Here’s collegiate football player & NFL prospect Miles Fox on 500 lb squat with 90 degree eccentric isometrics.
Yes there is conflicting data on what’s optimal for squat depth as some research studies show deeper ROM is optimal whereas other studies show the exact opposite.
So we’re left with a quandary where the research is essentially split. However if we examine foundational principles of kinesiology such as neuromuscular mechanisms of muscular contractions, structural physiology, osteokinematics, neurophysiology, biomechanics, anatomical levers, elastic energy, length tension relationship of muscles, proprioception, motor control, reciprocal inhibition, & co-contraction of reciprocal muscle groups, here’s what we find.
They’re all congruent with each other and they all point to the same thing: 90-deg joint angles (above parallel due to tibial inclination) are optimal for human body in terms of muscle growth, strength, power, joint health, muscle function, & athletic performance. If you don’t believe me examine the literature yourself.
Here are 70+ references supporting 90 deg. If you don’t like what you find then take it up with the scientists & researchers. I’m just the messenger putting the pieces of the puzzle together to help folks stay as health as possible & avoid the common issues associated with deep ATG squatting.
1.Full article on why 90 deg represents optimal squat depth with 18 scientific references [ Ссылка ] .
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2.Read more about why optimal mobility & maximal mobility are 2 very different things + 50 scientific references [ Ссылка ] .
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3. Article on science of squat depth & length tension relationship, functional anatomy, neuromuscular physiology, anatomical levers [ Ссылка ] .
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4. Article on PAIN science & the negative ramifications of excessive range of motion [ Ссылка ] .
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Read more in my 600 page book MOVEMENT REDEFINED which explains all of my methods with hundreds of studies. This book took me 8 years to write & includes my life’s work. Link in bio.
