eccentric on the way down concentric on the way up
The intercostal muscles, (muscles between the ribs), contract.
when you push yourself away from the floor, the lowering phase is the eccentric phase concentric = shortening of muscles - i like to think of this as when the muscles are "working" eccentric = lengthening of muscles - i like to think of this as when the opposite muscles would work to perform the action - e.g. when biceps brachii is eccentric in a bicep curl it is on the lowering phase (i.e. elbow extension - usually performed by triceps brachii)
The muscles contract which in turn push the baby out.
all of them, muscles can only contract and relax
When you do push-ups, the pressure on your abdominal muscles can cause them to contract and tighten, which may lead to discomfort or pain in your stomach. This is a normal response as your muscles are working hard to support your body during the exercise.
The muscles in your diaphragm contract to push the air out of your lungs.
Muscles contract and relax to pull/push
No. Muscles only pull (contract) and relax.
not push only pull or contract
During dumbbell push-ups, the muscles primarily worked are the chest muscles (pectoralis major), triceps, and shoulder muscles (deltoids).
Yes, your respiratory muscles contract each time you exhale to push air out of your lungs. The diaphragm and intercostal muscles are involved in this process.
During a reverse push-up, the muscles primarily worked are the triceps, shoulders, and chest.