Side planks
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Hi Fran. “Most effective” depends on a number of factors such as your training goal, any underlying physical limitations, physical condition of the person performing them etc. In the wonderful world of exercise, variety is the spice of life, and so no matter if one exercise is “more effective” than another or not, I will often use a variety of the same exercise to keep things interesting, challenging, and boredom-free!
LaRue, CSCS
www.lecfitness.com
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