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For a rock hard core that's stable and injury resistant, this abdominal exercise is second to none.
Improved shoulder and thoracic spine mobility for better overhead arm positioning. Great for swimmers and people that sit too much.
Improves hip and shoulder stability, head positioning, and coordination with rhythmic side-to-side weight shifting combined with lateral reaching.
Single Arm Reach: shoulders, scapular muscles, spinal erectors, core, glutes, lats, triceps, forearms