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The most important step is to rub your hands thoroughly especially between your fingers
Give you lack of nutrition and will take a toll on your ability to function through out the day. feeding your brain is like getting rest so you are recharged with out it you get tired sluggish and grumpy easily.
Lifting things that are too heavy... pushing too hard. Flexing out, and I think doing this specific workout for your stomach too much.
B.exercise because static stretch and rest aren't physical which wouldnt move muscles