Training the abdominal muscle group is no easy task. The muscles do not all respond to training at the same rate and there is a core group of abdominal s, running beneath the external ones with muscle fibres pointing the opposite way. This makes for a core picture which no single exercise can adequately address which helps explain why strong abs are hard to attain, which makes them an aim to strive for.
The five minute plank is a paradox of sorts. It uses relative inactivity to challenge the abdominal muscles and strengthen them. In five minutes you get to exercise as many parts as possible of the muscle wall. The result: strong abs, a strong core, more power, better coordination plus you get to look good on the beach.
Instructions: Repeat each move with no rest in between until the set is done. It will only take five minutes but it will likely to make you cry… or at least whimper a little bit.
What it works: abs, chest, glutes, lower back, core.
Tip: To gain the maximum out of your time in this exercise tense your abdominal muscle group at each rep.