Lie prone on floor with hands slightly wider than shoulder width. Bend knees and raise body up off floor by extend arms with body straight. Keeping body straight and knees bent, lower body to floor by bending arms. Push body up until arms are extended.

Muscle group: Chest

Steps

http://www.exrx.net/WeightExercises/PectoralSternal/BWPushupKnee.html

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