The plank isometric exercise
Muscles; abs internal and external
1. lay with your face down on the floor, keep your legs and feet together maintain a neutral spine position. Place hands together and form a V with forearms.
2. Lift your body transferring the weight onto your forearms, and toes, draw stomach in. Hold position for 30 -40secs beginners, otherwise hold for as long as possible.
for extra resistance extend arms further out
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