Medicine balls provide another unstable surface for you to work on. While they are much smaller than the stability ball and BOSU Trainer, don’t let their small size fool you. Performing planks on the medicine ball is a fast track to a strong, stable shoulder and a tight core.
This is a challenging unstable surface, so a strong full plank is a must before progressing to the medicine ball. Medicine balls come in a variety of weights, but, for the purpose of the planks in this book, any weight is fine since none of these variations require lifting the medicine balls from the floor.
MEDICINE BALL PLANK
SKILL LEVEL: Intermediate
MODIFICATION: Can be performed on ...
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