Plank will melt more fat deposits than sit-ups and it will strengthen internal and external muscles on the back and the core. It will also strengthen the muscles on the buttocks, arms and legs. Plank is actually holding the push-up position, so the muscles work in a similar way as with push-ups â?? they become stronger and more durable. The goal of this plank challenge is to see how long you can hold a plank. It is designed to be completed in a period of four weeks. The duration of the plank inc

Plank will melt more fat deposits than sit-ups and it will strengthen internal and external muscles on the back and the core. It will also strengthen the muscles on the buttocks, arms and legs. Plank is actually holding the push-up position, so the muscles work in a similar way as with push-ups â?? they become stronger and more durable. The goal of this plank challenge is to see how long you can hold a plank. It is designed to be completed in a period of four weeks. The duration of the plank inc

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