Muscle contraction is the tightening, shortening, or lengthening of muscles when you do some activity. It can happen when you hold or pick up something, or when you stretch or exercise with weights.
Proprioceptive neuromuscular facilitation (PNF) is a form of assisted stretching. It combines passive stretching with muscle contraction. First, your partner applies force to stretch your muscle ...
Medlife Crisis on MSN
Your muscle didn’t run out of anything – what’s actually causing cramps
Muscle cramps are usually blamed on dehydration or low potassium. It’s simple. It’s familiar. And it’s incomplete. The real cause has more to do with how your nervous system controls muscle ...
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