work out, dont eat fat food, and stay heathly
You would be using them more often.
because they are larger
The dilator muscle which makes the pupil larger and the constrictor muscle which makes the pupil smaller.
Exercising after eating could cause cramps.
Vomiting tends to make the body tense up. The hand muscles might contract as a result of this tensing. Also, vomiting can cause dehydration which can make muscles contract.
Not bigger but they might get longer without support.
If you exercise a lot, it should be totally normal to have larger muscles.
because when you exercise your muscles are strained and get micro tears in them which is normal. the tears cause your muscles to hurt but when they heal the muscle gets larger and stronger like building callsuses in skin so if your muscles don't hurt after exercise then you don't gain any muscles.
Muscles form by being torn (soreness) and then they are rebuilt with proteins and are larger.
Most other muscles are larger and all are located below the human head.
Lactic acid settling in the muscles
All muscles cause movement due to the contraction of coupled muscle cells. Perhaps the question intended to inquire about muscles that cause a bending in which the joint angle decreases. Muscles of this type are called flexor muscles (biceps for example).