when you run cross country it works your legs, calves and your back muscles.
Cross trainers work out many muscles but mainly they work out the abdominal and arm muscles.
If it's swimming versus downhill, that would be swimming. However, if it's swimming versus cross country, easily, cross country. What muscles do you need most for cross country skiing? All of them. Swimming neglects the calf and extensor (forearm) muscles, regardless of swimming style. In cross country skiing both your calves and forearms will get a workout, and the only part of the body not worked is the neck. However cross country skiing involves every single muscle in the human body.
the calf muscle can benefit from the cross trainer, if you are new to the cross trainer your calf muscles may be saw, just remember to stretch them out and make sure you do a warm up.
Cross country running or skiing are both great options for losing body fat. These exercises help you to get all of your muscles working together.
Cross-country. You use different length of poles in classic and free (skate) cross-country. The longest poles are used in free cross-country.
Probably soccer, because you move in different directions a lot.
Muscles that cross two joints and act on both joints are called biarticular muscles. These muscles can generate movement at both joints they cross, which can have implications for muscle function and coordination during activities involving those joints.
Cyclo- cross, cross-country mountainbiking, horse cross-country, cross-country rally, motorcross, supercross, cross-country running, cross-country skiing, boardercross, golfcross, lacrosse, and polocrosse.
Swimming is a easy activity to get more muscle mass. Also running, such as track or cross country.
concrete
cross country