When you flex your muscles you are contracting them. When your muscle fibers gain tension through Actin and Myosin crossbridge cycling they may shorten due to the tension. This is called muscle contraction
2 I have taken that before
You should change it out (try out a new method so that you get something that will work).
My answer would be B or A. You could do both of those while watching TV.
Vitamin C is water-soluble, ascorbic acid supplement to our body. We get vitamin C from citrus fruits, tomatoes and of course vitamin C tablets. Too much vitamin C or overdosage will cause indigestion, diarrhea, cramps, hair loss, nausea and nerve damage to the person. Daily recommended dosage is until 90 mg per day.
