Abdominal
the abdomen.
without muscles your body would not be able to work. you would not be able to do anything not even sit up or go poop.
Sit-ups will most benefit your abdominals and thigh muscles - as those are the groups doing most of the work.
Sit ups train the abdominals when performed properly. They also train the back muscles too. There are many different variations to work different muscle groups.
Rectus Abdominis
abdomen
A warm up prepares the muscles for work.
the abdominal muscles
your gluts, abs, and your intogalactibal muscle.
A sit up involves lifting your entire torso off the ground, while a crunch is a smaller movement that involves lifting just your shoulders off the ground. Sit ups engage a larger range of motion and work more muscles, while crunches specifically target the abdominal muscles.
tiens-toi droit is the French equivalent of 'sit up'. The sports exercise 'sit-ups' is called 'les abdos' (after the belly muscles 'abdominaux')
your gluts, abs, and your intogalactibal muscle.
The answer is homeostasis