Let’s make sure the hips are mobile and the tissues surrounding them are strong!
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As a College strength coach, I’d see this all the time during field work (high knees, A skips, wall slides, high knee carioca’s etc.)
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An easy way to spot it is when an athlete’s chest sinks towards the knees during those dynamic types of hip flexion.
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From another perspective we can also dive into relative flexibility. Stiffness in one area will tend to cause excess mobility in another. Therefore, if the thoracic spine is stiff the cervical spine and lumbar spine will need greater motion to compensate.
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This leads to excessive motion in those areas. Probably a good call to assess hip mobility/pelvic stability AND thoracic mobility if this movement pattern is apparent.
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https://www.youtube.com/watch?v=He7HvF4QhVo
Knocked out @mikerashid 's Iron Marathon Bench Press on Saturday January 18, 2014. His video of this workout is on YouTube (225lbs, 20 Sets, 210 reps). I have 2 installments because my camera fell and shut off during the 17th set. I didn't lose much footage (about 3 reps) from that set. I had a quarter on each side. No spotter. No assisted reps. Got every rep myself. It was just me, my spotify playlist, my canon camera and sheer will power that got me through! Clocked out at 50min, 50sec.
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https://www.youtube.com/watch?v=4qXTtzfCGFk