Spasms and cramps can be mild or extremely painful. 1  While they can happen to any skeletal muscle, they are most common in the legs and feet and muscles that cross two joints (the calf muscle, for example). Cramps can involve part of a muscle or all the muscles in a group.
Weak is the opposite of strong. Muscles, arguments, defenses, and coffee can all be weak â and when they are, it's not good. Anything weak is lacking in strength or power. If your muscles are weak, you can't lift much. If your will power is weak, you give up easily. Food and drinks with little flavor are weak, and an argument that is flimsy is weak.
The weak interaction (often called the weak force or sometimes the weak nuclear force[1]) is one of the four fundamental interactions of nature. In the Standard Model of particle physics, it is due to the exchange of the heavy W and Z bosons.