A Prerequisite to Lifting Heavy Weights

Ahhh how exciting, my first blog post as a coach at SAPT. I’ve got my cup of coffee, The Best Around playing on loop and I’ll be doing hip mobilities throughout writing this blog entry. Why? Because The Best Around was originally supposed to be for a Rocky III montage, but was replaced by Eye of the Tiger and I think Joe Esposito deserves more credit for the inspiration it brings…. Why am I doing the hip mobilities every 30 minutes while at a desk? Easy, because I want to squat later. Mobility: A Prerequisite to Lifting Heavy Weights

If you’re reading this blog, then it’s obvious you want to get strong, build muscle, and improve fitness in each and everyone of your workouts. You’re the type of person who sees exercises like deficit deadlifts, deep squats and overhead presses and gets as giddy as a little schoolgirl at the thought of trying it in your next workout. You look up the technique, take a few mental notes, begin with light weight for a warm-up, and then finally drop butt-to-heels into that heavy squat.

But what happened? You thought you would drive up out of the hole like superman initiating his flight takeoff, but instead you feel your lower back light up like Iron Man’s arc reactor.

You didn’t check your mobility prerequisites for that exercise did you?

Position is Power

Every exercise requires a certain degree of mobility in particular joints in order to execute the movement safely. If the mobility is not there, then the body will look for a way around it to accomplish that movement. By doing this you are putting yourself into a compromised position, and what’s worse is that if you’re doing it with training, you are reinforcing a compromised motor pattern. Practice doesn’t make perfect; practice makes permanent.

Not only are you actually weaker in these compromised positions, but you are more likely to injure yourself. This needs to be fixed before you can get strong. You can only squat so much weight with a Hyena Butt. You must work on gaining enough mobility to get into whatever position a given exercise/movement requires, WITHOUT compromise, and then you can become strong.

I’m sure you’re probably wishing I’d just shut up and tell you how to get mobile, right? Well too bad! Because first it is more important to understand WHAT needs to be mobile.

Understanding Mobility

Joint mobility is the degree to which a joint can move through a range of motion. When a joint becomes less mobile, it becomes more stable as it can’t move. (Note: Stability is not a bad thing! You just need it in the right places.)

Though it’s not black and white, many of our joints are meant to be mobile while others are stable. Sometimes, due to activities (or lack thereof) in our daily life, injuries or even the shoes we wear, joints that should be mobile become stable and throw off our body’s movements. When these joints that should be mobile are then locked down, joints that are stable then become mobile to compensate for the lost motion. This relationship is constant throughout the entire body and it’s the reason you will see lots of errors in movements that can’t be fixed with simple queues.

The Joint-by-Joint Approach outlines this mobility-stability relationship between the joints and how it could affect movement. Essentially it conveys that the following joints need more mobility or stability:

Arch of Foot – Stability

Ankle- Mobility

Knee- Stability

Hips- Mobility

Lumbar spine- Stability

Thoracic spine- Mobility

Scapula- Stability

Gleno-humeral(shoulder) joint- Mobility

Does anyone else see the pattern here? Our body alternates the needs of our joints from head to toe. So what do you think happens if one of these is thrown off? Then the pattern is broken and they all get thrown off to some extent. If someone is flat footed, they will probably have poor foot stability and it will cause their feet to collapse in movement. This results in a loss of ankle mobility over time, and their knees will almost always cave in when they squat. The reason for this is because their knees are now looking for mobility. The same can be true for losing stability. Lets say Yoga Sue starts stretching out her lower back more and more because she’s been having back pain. By creating more mobility in her lumbar spine through stretching, she is reinforcing her body to move through her lower back rather than hips and will eventually lose hip mobility. I’ll touch more on the stability component in my next post.

If the stability/mobility pattern is thrown off, then it will compromise your movements and thus jeopardize the intended benefits of lifting heavy things and your training sessions will look like poop.

Fix It!

So I’m sure you’ve spent the past few minutes form checking your squat depth in a mirror and are now begging for the answer of how to become a mobility master. Have patience grasshopper; first you must find your weakness.

Step 1. Find your limiting factor

This step will most likely need a coach or knowledgable training partner. You must determine what joint is immobile and causing the issue in your movement. You can use a movement screen for this or you can informally just breakdown the movement to see when the poop hits the fan.

Step 2. Determine WHY it’s your limiting factor

Joints can become immobile for several reasons. More often then not it is because your joint is stuck in one position for a long period of time due to your lifestyle. If you find this to be the culprit you’re going to need to make some changes before you can start seeing results. You may have to stop wearing those 5 inch heels or you may have to start getting up and walking from your desk every 20 minutes.

Sometimes a joint can become immobile due to overuse in a certain range of motion. You will see this a lot in runners or any other athlete that goes through repetitive motion. If this were the finding, you would just go straight to step 3.

Occasionally you may find that a joint is immobile because it is protecting something. This will take a more educated diagnosis, but if that is the case, then DO NOT MOBILIZE IT. If muscles aren’t firing right or there is a structural issue causing instability, the body’s natural response is to lock that joint down to keep it from being unstable and causing more damage.

Step 3. Soft Tissue Work

You now know what’s immobile and why. You’re about to start training, now it’s time to mobilize it. Foam rolling is one of the fastest ways to increase mobility of a certain joint. Simply roll on the muscles that influence that joint and try to workout the super-happy-fun knots you find. If you’re new to this use a foam roller, if you’re one bad dude, try a PVC pipe or lax balls. If it’s your thoracic spine, try using a t-spine peanut.

Step 4. Mobilities

You’re going to have to lengthen the tissues holding down the joint at some point. I find it most effective to do in the warm up, right after foam rolling and even throw a few into the workouts. If it’s pre or intra-workout, then you will want to use dynamic movements to accomplish this. Otherwise feel free to do the good ol’ fashioned static holds.

Step 5. Activate

If you take one thing away from this process, I want it to be this: Mobility will not stick, unless stability is created somewhere else. If you’re trying to loosen up your hip flexors, do some glute work after you stretch them. If you’re trying to improve ankle mobility, do some dorsiflexion exercises after you stretch the calf. If you’re trying to improve adductor length, do some core stabilization exercises right after loosening up the adductors. I think you get the picture.

Step 6. Use It

In order to keep your joints mobile, you must consistently use the full range of motion in them when you train. This means going to full depth in a squat, locking out that deadlift and overhead press and really grinding the lateral lunges. If you want to get fancy with it, you can even use exercises that are known for creating excessive range of motion like Bulgarian split squats, windmills and arm bars. Whatever you decide to do, don’t cheat yourself and use the full range.

Step 7. Dominate

If you consistently follow the previous steps, you should be in a good position to rip some weight off the floor. Some issues will take longer to fix then others, but be religious with your mobility work and it will pay off to help you feel and perform better.

Lifting & Running = Monster Benefits - An Intern Post!!!

This week we're going with one theme: RunFAST. This is the new program we've been developing that we'll officially take the lid off of on Friday. I have to acknowledge, we're offering something totally new, so we're gonna take it slow and start with a post a bit more traditional in terms of the usual SAPTstrength banter. But check the blog every day this week. We've got 5 killer posts lined up.

For the first RunFAST post, one of our interns has written a fantastic post describing in detail the benefits of lifting for ALL TYPES OF RUNNERS (yes, you distance folks can enjoy this, too!).

Why should you listen to this guy who I just admitted is an intern, well, he's a special intern. His name is Gustavo Osorio (or Goose from here on out) and he just graduated from George Mason. Goose was a member of the track team and a stellar decathlete who very recently repeated as CAA champion! Pretty cool, right? This guy knows his stuff. I learned a few things myself and, given that I was his strength coach, that means he really knows some awesome details about high-performance.

I opened up comments again, so please post your thoughts and share with friends. Here we go:

Lifting And Its Benefits For Runners!

“Strength is the foundation for excellence,” this is a mindset I’ve come to respect and adopt for myself after my short time here at SAPT. When you think about it a strong body is a health body, one capable of efficiently moving in any way and letting a person’s athleticism truly shine. Strength is without a doubt the foundation for speed and agility. This concept that may seem foreign to many runners because of all the myths regarding resistance training and running. Many runners and even some running coaches are under the impression that hitting up the weight room once in a while will only result in injury, getting “bulky”, and losing that speed they’ve worked so hard to achieve. When, in reality, a well-structured resistance training program can make the body bulletproof, make your muscles more efficient without bulk, and boost the training effects of your running workouts (aka make you faster).

Myth #1: Lifting (squatting and deadlifting) is bad for your back. Don’t do it!

When performed correctly and with the appropriate assistance work squats and deadlifts can help you build a bulletproof back, glutes, and hamstrings. All three of these muscle groups also happen to be three of the most common sites for sprains and injuries on runners. Coincidence?? I think not! When running you’re lower back acts as a shock absorber, while the glutes and hamstrings are used for force production to propel the body forward. If an individual doesn’t strengthen these muscle groups and continues to constantly hammer them with more running eventually the muscles breakdown from overuse and an injury occurs.

On the other hand, if an individual strengthens these muscle groups they reduce their chances of injury and increase the work load their body can handle. This means they’ll be able to put in more work on the track during practice and, when meet day arrives, fast times will be run!

Fun fact about elite runners, whether it be a sprinter or a distance runner, is that they have some type of year around resistance training program implemented into their training. When you get to the Olympic level and everyone is tenths of seconds away from each other, keeping your body healthy through resistance training makes the difference between being an Olympic medalist and not making the final.

Myth #2: Lifting will make you bulky and slow

A big fear amongst runners is that resistance training will put on too much “useless” muscle for them to carry around. Truth is, a resistance training routine will make you bulky and slow ONLY if you completely stop running and if you have no idea of how to make it sport specific. Just because you’re lifting weights doesn’t mean you’ll turn into the hulk overnight (or ever... let's be real here) but it can make your muscles more efficient at what they do. By training your energy systems through lifting you’re running can be exponentially enhanced. Think of your body as a car and that the energy systems providethree different types of fuel it runs on. These BIG 3 are: the phosphagen system, the anaerobic system, and the aerobic system.

The phosphagen system provide the equivalent of jet fuel for the body. It gives you tons of energy but it burns out super fast! How fast you ask?? Well it gives you enough for 6 to 10 seconds of all out exertion. It provides the energy for the beginning of every race and it is the most dominant energy system during short running event, 60 meters to 100 meters. It is also involved in any sport that requires any sudden bursts of speed and explosion such as basketball, baseball, football, and volleyball. This system is primarily trained through plyometrics and lifts that require high force production at high speeds.

The anaerobic system gives you a mix between jet fuel and regular gas, it still yields a high amount of energy and manages to last a bit longer, between 1 to 3 minutes depending on the intensity of the event. This system is the most dominant for the 400-800 meter distances.It is also involved in sports that require prolonged bouts of speed and some endurance such as boxing, wrestling, lacrosse, and soccer. This is a tricky energy system to train because it requires a mix of power training, muscular strength training, and some muscular endurance training.

The aerobic system gives the body the same effect gas would in a car, it doesn’t let you go blistering fast but it give you a constant stream of energy to keep you going for miles. This is the dominant system in athletes who compete in endurance events such as triathlons, marathons, long distance swimming, and cross country skiing. This energy system can be trained through circuit training and low weight/high rep/low rest lifting.

**WORD OF CAUTION: Train a certain energy system through lifting does not mean you’ll necessarily get faster. When you integrate a lifting program on to a running program correctly the two can complement each other quite nicely. However if all you do is lift aerobically and then expect to go run a marathon you most likely won’t finish.**

Myth #3: Lifting has no positive transfer to running.

Another great benefit of resistance training is the improvement in something called your Rate of Force Development (RFD). [Side note: Kelsey did an amazing job of going into great detail on RFD, if you haven’t read her posts I strongly recommend them! Part 1 and Part 2.] Basically what that means is how fast your muscles can produce a high amount of force. This is beneficial to runners and all athletes because producing higher amounts of force at a faster rate enable you to move faster. Through training this can help optimize your stride length (amount of distance covered per step) and increase your stride frequency (how fast your feet hit the ground) both of which will also make you faster.

This last bit is something most people often neglect, but it makes a world of difference in their running. Aside from improving energy systems and Rate of Force Development lifting can be used to improve running posture. When performed correctly the squat and the deadlift teach people to brace their core and to properly align their back so it’s in the neutral position. A lot of people can go through an entire running career (like myself) without ever realizing that this has a massive positive transfer to running.

The two pictures above demonstrate how the body should be aligned during the deadlift and squat. If you take a side picture of yourself you should be able to draw a straight line from your hips to the base of the head.

Let’s take a look at Tyson Gay coming out of blocks. You can make a straight line from his hips to his head, JUST like a squat or deadlift! Coincidence?? I think not!  By keeping his back in a neutral position and bracing his core he is getting the most propulsion out of the power he is putting on the ground. By keeping his core rigid (not tense) all the force being placed on the ground is not lost or being absorbed by an arched or hunched back. Same thing would happen if you lifted with a rounded back, the spine would absorb a lot of the force going up (deadlift) or down (squat) instead of letting your legs and glutes do the work.

Now take a look on the right at Carl Lewis, he is in the Maximum Velocity phase of the 100 meters which means he is trying to maintain his top speed for as long as possible. The line from the hips to the head is still there which means he is getting the most out of the force production. But that’s not all! Notice how his hip are neutral and not anteriorly rotated, his butt isn’t sticking out. This allows him to get a higher knee drive, cover more ground with his stride, and keeps him from kicking his leg too far back. A great way to teach this to people is the finishing position in the squat and the deadlift often referred to as the “lock out”. And like the squat/deadlift lock out phase if his hips were too posteriorly rotated, too far forward, he would put his back out of alignment and sacrifice kick back range of motion.

Rate of Force Development Part 2: Training to Increase RFD

Last post, I went over some of the terms and definitions of rate of force development (RFD). I also mentioned motor units (MU) and if, at this point, you have no clue what I'm talking about, go back and read it. It's right here. Why should you care about increasing your rate of force development? Because power sports (which is every sport to some degree) is dependent upon the ability to produce high levels of force at any given moment, like running away from a T-Rex.

Good motivation for increasing rate of force development.

There are two main ways research and experience backs up to train RFD: explosive strength training (Newton et al. Med. Sciences Sports Exer. 1999) and maximal load training, i.e. picking up heavy stuff. (McBride et al, J. Strength and Conditioning Research 2002). It should be noted that most of the research has been done with isolated muscles/movements (it's a lot easier to test the quadriceps muscle in a leg extension machine than the various muscle groups in a deadlift) and so it can be a little tricky to apply to real life. However, where science has holes, the experience of coaches fills the gap!

First: force = mass x acceleration Keep this in mind...

Explosive training (speed work) is taking a sub-max load (say, 50% of your one rep max) and moving it as fast as possible, with good form obviously, for 1-3 reps per set. That's key- as fast as possible. Those high threshold motor units, the ones that produce the most force, are recruited to move that weight fast by contracting quickly. Even though the load is light, the acceleration is high. By challenging your system to move loads quickly, we increase the force production by increasing the acceleration part of the equation. This is one way to increase RFD. Typically at SAPT, we program 1-3 reps for 6-8 sets with a strict :45-:60 rest period. Why the rest parameters? We want to keep the nervous system "primed" and if the rest period is too long, we lose a bit of that ability to send rapid signals to the muscles.

Maximal load training, aka picking up some freakin' heavy weight, will typically be above 90% of your one rep max, also we keep the rep range between 1 and 3 (mainly because form can turn to utter poo very quickly under heavy loads if the volume is too high). This untilizes the other part of the force equation, mass. If the acceleration is low, the mass has to be high in order to have high force production. Once again, neural drive is increased and those high threshold MU's get activated. The threat of being crushed beneath a heavy bar can do that.

Recruit! Recruit! Recruit!

Bottom line: As the RFD increases --> the recruitment threshold of the more powerful motor units decreases --> more force is produced sooner in the movement --> heavier weights can be moved/athlete becomes more explosive in sport movements.

Think back on poor lifter B from last post who had a really low RFD during his 400lb deadlift attempt. Being the determined young man that he is, he trained intelligently to increase if RFD through practicing speed deadlifts (to get the bar off the floor faster) and maximal training, (to challenge the high threshold units to fire). Pretty soon, instead of taking 3 seconds to even get the bar off the floor, it only takes 1 second of effort and instead fo straining for 5 seconds just to get the bar to his knees, he's able to accelerate through the pull and get it to lock out in just under 4 seconds. Success!

Conquered.

For sake of the blog post, we could assume he always had the capability of producing enough force to pull 400lbs, but could produce it fast enough before his body pooped out. Now, with his new and improved RFD, 400lbs flies up like it's nothin.'

Another thing to keep in mind is the torque-angle relationship during the movement. Right... what?

All that means is the torque on the joints will change depending on their angles throughout the movement, thus affecting the amount of force the muscles surrounding those joints have to produce. For example, typically* the initial pull off the floor in a deadlift will be harder than the last 1-2 inches before locking out due to the angle of the hip and knees (at the bottom, the glutes are in a stretched position which makes contracting a little tougher than at the top when they're closer to their resting length.) Same concept applies to the bench press, typically** the first 1-2 inches off the chest are more difficult than the last 1-2 inches at lockout. The implication of all this being  the muscles will have different force-production demands throughout the exercise.

Knowing this, we can train through the "easier" angles and still impose a decent stimulus to keep those higher threshold motor units firing the whole time. How?

With chains and bands! Yay!

Aside from looking totally awesome, chains provided added resistance during the "easier" portions of the exercise to encourage (read: compel) muscles to maintain a high force output throughout the movement. Watch Conrad, The Boss, deadlift with chains:

At the bottom, when the torque-angle relationship is less favorable, the weight is the lightest and as he pulls up, the weight increases as glutes must maintain a high  level of force output to complete the deadlift. No lazy glutes up in hea'! Bands produce a similar effect. Check out the smashingly informative reverse band bench post Steve wrote here.

There are other ways, but quite frankly this blog post is reaching saga-like proportions so I'm going to cut it here. And remember kids:

*unless your name is Kelsey Reed and you have a torso 6 inches long... but can't lock the pull out.

** unless your arms a crazy long.

Deadlift Troubleshooting Using the Coach's Eye

Here's a clip I recently threw together using the extremely handy application, Coach's Eye. Today we are going to analyze a recent deadlift session of one of our adult clients, Conrad, and explain how we were able to use this video footage to help him take his deadlift from "good" to "better than good."

More of these "Coach's Eye Analyses" will follow on SAPTstrength in the future, should you all find them enjoyable and/or useful.

Grip, Dip, and RIP!

Obviously, we’re talking about DEADLIFTS! If you haven’t heard it before, “grip, dip and rip” typically refers to the set-up and execution of picking up heavy barbells off the ground. Grip- Grab the bar and squeeze it tight. Dip- Dip your hips down, get your back flat. RIP!- RIP that bar off the floor!

I’m a big fan of the phrase. It takes an extremely technical lift like the deadlift and boils it down to three simple words that happen to rhyme. Awesome. Of course, when teaching someone how to properly pick up heavy things, more effective cueing is going to be necessary. However, if you’ve been deadlifting for a while and your technique is in check, sometimes you need to stop obsessing over the MILLIONS of details involved in the technique and just RIP that bar off the ground and into lockout.

The Dip

Although each cue deserves a blog post of its own, what I want to talk about specifically is that crucial point between the grip and the rip. That moment immediately before you pull when you set your position can make or break your lift. So what really goes on in that short duration in your deadlift set-up?

Bracing and Setting Your Lower Back

The moment you set your hips into position is also the moment when you should be bracing as hard as you can through your abs. With your hips in place and your abs as tight as possible, you set your lower back into a neutral position to protect your spine from the high sheer and compressive forces you’re about to hit it with.

Applying Tension in the Hamstrings

Pulling your hips down into position while simultaneously flattening out your lower back will place a significant amount of tension on your hamstrings, which is a great thing to have happen right before your deadlift. By creating this pre-stretch, you will be able to take advantage of the stretch reflex that we humans so thoroughly enjoy. When the muscle spindles in your hamstrings are stimulated by the stretch they will freak out and wake up all the contractile units, who will all jump on-board the deadlifting train and say “alright boss, LET’S DO THIS!”

One thing to keep in mind regarding the pre-stretch on your hamstrings is that the longer you hold that stretched position the more the reflex potential will be diminished. Think about it in terms of another lift: what’s easier, a touch-and-go bench press or a bench press with a 3 second pause on your chest? So when you dip down into position on your deadlift and feel tight, PULL! Don’t hang out at the bottom for too long.

Setting Your Upper Back

Another key component in preparing for a nice deadlift is setting your upper back. This means shoulders down and back, sufficient t-spine extension, neck packed, and using your lats. During my “dip” on the deadlift, I also like to roll my shoulders from a shrugged position into a packed position while doing my best to extend through the t-spine. I also like to apply some external rotation torque on the bar with my hands because I feel like it helps me “turn on” my lats.

All of THAT in the Dip?!?

Yep, all of that happens in the dip. It’s a lot of detail, but as I mentioned earlier, don’t get caught up in trying to go down a HUGE technique checklist before every pull. Trust me, you’ll drive yourself crazy because you will always be able to find an aspect of the lift you didn’t do with absolute perfection. Just work on fixing a couple form issues at a time and keep on grippin’ dippin’ and rippin’!

10 Reasons You Should Swing Heavy Bells

So, I forgot to post on Wednesday. Sorry folks! To make up for it, I present this: As the title states: Swing. Big. Bells.

Me and Natasha, just swinging around.

1. Glute strength- Do you want a strong butt? Of course you do, that's why you read this site. Swings are fantastic glute builders. The glutes are the most powerful hip extensors so it makes sense to perform exercises that force the glutes to extend the hips... hmmm, sounds like swings huh? The powerful snap of the swing carries over into other lifts such as the deadlift and squat. The glutes also play in vital role in sprinting and jumping. So if you want to be the Athlete-Of-Steel, you needs buns of steel. Swing it baby!

Gotta build the wheels if you want speed!

2. Upper back strength- During the swing, the upper back is essentially holding an isometric contraction to maintain the "chest up" postion throughout the swing. The lats are working hard to keep the bell close to the body (so it doesn't go flying away and pull you with it). The rhomboids and the teres major and minor are doing their duty of keeping the shoulder blades down and back and keeping the humerus in it's socket (kinda important). Guess what? Chin/Pull ups require those muscles too.

All my ButtKamp Ladies are swingers (the G-Rated kind, not the other kind) and ALL my ButtKamp Ladies' have improved in the pull up/chin up. We now have 2 women who are able to do a body weight chin up...(Suzanne, above, is one. The day after this, she nailed it!) pretty awesome! Personally, I've noticed an marked difference in my pull up strength, both my 1-rep max (weight on my waist) and my total rep max (how many I can do) have increased. With all the work the lats and upper back do in the swing, I don't think it's a cowinky-dink. Once again, the upper back strength also carries over to the big girl/boy lifts: squats and deads. Try performing either with a weak upper back and you'll find yourself stapled by the weight.

3. Injury prevention/rehab for lower backs- I professed my love and belief in swings for back rehab on Wednesday. The nature of swings, strengthening glutes, upper back, the spinal erectors, and core muscles, perfectly align with the needs of most back-pain sufferers. Most of us have, weak glutes, upper backs, cores, and spinal erectors. I know mine were (thus part of the reason I have injuries). While I can't claim that swings will heal any injury, they can at least prevent further injury (or injury if there isn't one present) and build up the muscles that protect the injury.

4. Grip strength- When your forced to grip a heavy weight while it's moving, you're going to build up some pretty strong hand and forearm muscles. One of my weak links in the deadlift (and pull ups) was my grip. I found this out pretty quickly once I started doing high rep, heavy swings. My forearms were on fire and my grip often gave out before the rest of me did. If you like picking up heavy things and walking around, swings will help build up an iron grip so you can pick up heavier things and walk around even more.

Keep on walkin'...

5. Cardiovascular and muscular endurance- Don't like running? Me neither. I do love to swing though. Swinging is excellent for building up cardiovascular endurance and muscular endurance (the ability for muscles to produce sub-max force over an extended period of time). Don't believe me? Try this: do a ladder of 1-2-3-4-5-6-7-8-9-10-9-8-7-6-5-4-3-2-1. Take a breath for every swing you do. How do you feel? Oh wait, I can't hear your over you pounding heart and labored breathing...

I see too many people talk while using this...

6. Core strength and function- During the swing, the midsection must remain tight not only to protect the spine, but also to transfer the force of the glute contractions into the bell to swing it. The core has to also be able to relax slightly so you can breathe throughout the workout (pretty important piece of exercise, that breathing. Generally, you inhale on the way down, brace on the way up, and breathe out forcefully at the apex of the swing.) and immediately brace for the next cycle of contraction as the bell swings forward. For those with back pain, sometimes the core muscles aren't firing in the right order. Swings help retrain the muscles in this sense.

7. Joint-Friendly conditioning- As mentioned, swings are pretty safe for those with back injuries (most of the time anyway). They're a perfect conditioning tool for those with cranky knees, ankles, and shoulders (mostly). They're also good introductory training for deconditioned individuals as they're scalable to individual strength and fitness levels. Unlike running, which essentially is thousands of one-legged hops, swings have very little negative joint impact (the elbows can take a beating if the upper back isn't doing it's job though so be prudent!) so it's less likely that you'll sustain an injury and want to quit exercising.

Done...

8. Leanness- This is more anecdotal than factual, but swinging promotes leanness better than any other form of conditioning I've run across (outside of regular sprint sessions, which can take their toll on the system physically as they're pretty stressful). Coach Dan John has spoken of the power of the swing to help athletes/trainees maintain a lower body fat percentage and I've noticed in myself as well. It's not going to be the magic bullet, but for those who train hard and eat pretty well, the addition of swings can help pull the body fat down a bit without too much stress to your system.

9. Overall strength- Swings involve the whole body, in case you couldn't tell from the above points. If you want to increase your strength, add some of these in and you'll be amazed at the carry over into the rest of your workouts/activities.

Hagrid-like strength in a little body

10. Self-Defense- If swings help build up the glutes and hamstrings, which are the primary movers and shakers of sprinting, should you be attacked by zombies or some other terrifying creature, you'll be able to scamper away pretty darn fast. Or, if you're brave, just swing your bell at them and let go. 60+ pounds to the face will mess any body up. Pretty sure Kathy could take down any foe.

If those didn't convince you then, well, I have no words.