Mostly your upper back muscles. Mostly your upper back muscles.
The sole f80 treadmill work a few muscles out. They work out your quadriceps, hamstrings, gluteus maximus, calf muscle, lower abdominal muscles and your upper abdominal muscles.
They are an upper body exercise. They also work core muscles.
The shoulder press works the upper body muscles such as the deltoids and the triceps. The shoulder press also involves the core muscles.
Because the chicken wing needs very many muscles to move its wing. The muscles work together when the bird is in flight to move the wing up and down.
An elliptical stepper with upper arm moving bars will work both upper and lower body muscles.
The muscles in your upper arms and upper legs, mainly.
The Sartorius and Gracilis are two upper leg "strap" muscles.
The biceps is a word meaning the muscles on the upper arm.
forearm and upper arm muscles.
Most of the work is being done by your leg muscles, but the upper body sees some activity as it keeps you balanced and upright.
From what I know it mainly works your triceps, shoulders, upper back, chest and your neck.