molecule. 1  Chemistry, Physics. the smallest physical unit of an element or compound, consisting of one or more like atoms in an element and two or more different atoms in a compound. 2  Chemistry. a quantity of a substance, the weight of which, measured in any chosen unit, is numerically equal to the molecular weight; gram molecule.
When I do crunches my neck starts to tighten up and it makes me have to rest before doing another set of crunches.
Normally a hurt muscle, like a calf muscle, can be wrapped against a splint to keep it immobilize. The trapezius is a bit harder to wrap. In fact, normally you wonât wrap your trap, but your doctor might recommend that you wear a soft neck brace to immobilize your neck and keep it from doing further damage to your trap.