Question

how do muscles help our body

Answer 1

Muscles make up half of a person's body weight. They are connected to bones by tough, cord-like tissues called tendons, which allow the muscles to pull on bones. If you wiggle your fingers, you can see the tendons on the back of your hand move as they do their work.

Answer 2

hi friend!!
Our muscles often have multiple functions, such as the gluteus maximus, which extends and externally rotates the hip joint as well as guides the femoral head in the hip socket. That's a lot of jobs. So when the gluteus isn't working well, several motions are affected, which can then result in several possible injuries. You'll also notice that some muscles affect both the upper and lower leg bone movements, sometimes in opposite ways, as in the sartorius muscle, which externally rotates the thigh bone but internally rotates the tibia.

Many of these muscles overlap in function. For instance the tensor fascia lata (TFL), rectus femoris, and sartorius all flex the hip joint. And the gluteus maximus and part of the gluteus medius both externally rotate the thigh bone. To me, this is important because it shows the body has several redundant muscles for the same job. Therefore if one muscle begins to fail, another can seamlessly take up the load. This can't go on forever though, so problems arise when the backup muscle ends up doing too much of the work for too long (as in the case of the hamstrings overworking due to poor gluteal function).
hope my answer helps you✌✌✌✌✌