“Loss of lumbar … that whole lumbar is tucking under. So, we want to find that sweet spot,” says CrossFit Seminar staff member Jenni Orr.

Here, Orr works with a group on midline stabilization in the air squat. For more info and upcoming dates for the CrossFit Level 1 Certificate Course: https://training.crossfit.com/level-one

The CrossFit Journal — (http://journal.crossfit.com)

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