tightness in a muscle
Flexor muscles have a predictable tendency towards tightness.
Tightness around the ribcage can be caused by broken ribs, pulled or strained muscles, or fluid in or around the lung or heart.
weakness or tightness of the iliopsoas (psoas major/iliacus)
opposite paired muscles are ones that while one is relaxing, the other is flexing. for example, the Triceps and Biceps are opposite.
you should work out all your muscles, as if you just work out certain ones, then other muscles may develop problems such as pains and tightness due to not being used while other muscles are being possibly overworked
The general opposite of contraction is expansion, or possibly inflation. For muscles, the opposite of contraction is relaxation.
They constrict, cramp, & spasm in an attempt to prevent losing body heat.
Antagonists are muscles that work in the opposite direction from prime movers and synergists.
Relax. Muscles can only work by contracting (tensing). When an opposite force is desired, an opposite muscle contracts.
I have experienced tightness and cramping after sex. later in pregnancy, sex can bring on labor. early in pregnancy, your probably feeling your muscles contracting after orgasm because it affects your uterus as well. like braxton hicks contractions
The tightness of the anal sphincter muscles helps to maintain bowel control and prevent involuntary passage of waste. Additionally, the anus has sensitive nerve endings, contributing to the sensation of tightness.
The warm water in a bath warms your muscles allowing them to relax. Muscle tightness is often a main cause of pain, especially after exercise.