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.
3. Cold Pack: Cold pack helps to relieve the neck pain and ease the stiff neck. Cold pack helps to dull the pain and limits the buildup of lactic acid that causes soreness. Try this regularly whenever you feel pain at your neck and shoulder.2. Naturally, there are many herbs that helps to treat the pain of stiff neck. You can use them either in any cream or balm form. 1  Menthol is an herb that has cooling effect and when applied on the neck that works to relieve pain. 2  Camphor reduces swelling and increases the blood circulation to the area.