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Amplitude Of Movement, Law of Repetitive Motion, and Plyometrics
You may have heard trainers and coaches talk about movement amplitude. I often talk about amplitude as being one of those performance characteristics that determine the outcome of a training regimen and one of the factors indicating reductions or improvement in performance.
Amplitude is also part of the "law of repetitive motion" equation developed by Dr. Michael P. Leahy, who is the founder of Active Release Techniques (ART). This "law" is an equation describing the interaction between various parameters of human motion: I=NF/AR where:
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Tweaking the Overhead Squat: Dislocates, Reaching Back, Grip Width and Mobility Drills
The basic bar position for the overhead squat is barbell held overhead and lined up in the imaginary "pocket" between the scapula and the back of the ears. Some people teach this as being between the shoulders and ears as well. It doesn't make a lot of difference. The bar will be somewhere in that area and with practice you will develop the proper position.
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What Is Dynamic Mobility?
I've noticed a lot of folks are searching for the definition of the term "dynamic mobility" and I'm pretty sure they will get fairly confused trying to come up with a definition of that in these pages so I wanted to clear it up a bit.
Mobility? No problem. Dynamic? Sure. But dynamic mobility? Sounds redundant, right?
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Static Stretching Effects On Force Production and Performance
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Shoulder Injury Prevention
The shoulder is a ball-and-socket joint. The head of the humerus (the bone where your biceps and triceps are) attaches into the “glenoid fossa”, which is simply a cavity for the bone to go into. This is just one aspect of this complex joint. It gets crazy.
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The Stretching Handbook
The techniques, ideas, and suggestions in this document are not intended as a substitute for proper medical advice! Consult your physician or health care professional before performing any new exercise or exercise technique, particularly if you are pregnant or nursing, or if you are elderly, or if you have any chronic or recurring conditions. Any application of the techniques, ideas, and suggestions in this document is at the reader's sole discretion and risk.
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Mobility and Flexibility
Flexibility can have two definitions:
1.) The ability of muscle to lengthen during passive movements.
2.) Range of motion about a joint and surrounding musculature during passive movements.
Mobility can also have two ways of being defined. The main definition is the state of being in motion. But this state of motion can be looked at within certain joints (subtalar mobility) or as a physical whole (moving from one position into the next during a run).
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