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The BOSU Ballast ball has 2.5 pounds of MDL which stands for Multi-Dimensional Load.
It is not sand, but a specially formulated material which responds to human m...
The BOSU Ballast ball has 2.5 pounds of MDL which stands for Multi-Dimensional Load.
It is not sand, but a specially formulated material which responds to human movement.
This exercise is only done properly if you keep your core engaged and your lower back DOES NOT ARCH, if the lower back archest (belly button goes up in air) STOP and perform this without the ball, or perform crunches.
To learn the real, no-nonsense, hype and crap of the corrupt fitness industry please visit personal trainer Mike Behnken, MS, CSCS http://AskTheTrainer.com
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