the abdominal muscles
The gluteal muscle.
The major spine flexor is the rectus abdominis muscle. It runs along the front of the abdomen and helps to bend the spine forward. It is commonly known as the "abs" muscle and is important for activities like sit-ups and crunches.
your gluts, abs, and your intogalactibal muscle.
Pretty much only abs, if you're doing them correctly. If you're doing it wrong, tights and arms might be worked too.
ur abs
sartorius
Because you sit on it everyday!
Rectus abdominus Internal and external obliques Transversus abdominus.
Technically speaking it's the abs. The agonist muscle in a situp is actually the hip flexors.
In a sit-up, the primary agonist muscle is the rectus abdominis. This muscle contracts to flex the spine and bring the torso towards the thighs. Other muscles, such as the hip flexors, also assist in the movement but the rectus abdominis is the main muscle responsible for the action.
The prime mover during sit-ups is the rectus abdominis muscle. This muscle, commonly referred to as the "abs," contracts to flex the spine, allowing the torso to lift towards the knees. Additionally, the hip flexors assist in the movement, but the rectus abdominis is the primary muscle responsible for the action.
A sit up is an eccentric muscle contraction.