ham string
You use the muscles in your body.
You use your quadriceps, hamstrings, gluts, abs, biceps, triceps, and obliques.
Because they stretch and use most of the muscles in your body.
No, jumping primarily engages major muscles in the lower body, such as the quadriceps, hamstrings, and calf muscles, along with core muscles for stability and balance. While other muscles may provide support or stabilization, not every muscle in the body is actively used during a jump.
Kangaroos and other macropods such as wallabies and wallaroos use their tail to balance while jumping.
Running. Jumping. Eating. Even sleeping. Even eating ice cream while sitting on the couch watching Tv! Ok that one up there on top of this sentence is just a joke.
The key muscles are those used for jumping, and striking the ball. For jumping, mostly quads, hamstrings, glutes and lower back. Also calves and smaller muscles in feet. Squats and plyometric jumping can help improve your jump. For striking the ball, mainly the shoulder muscles, also abs/core and lats, for pulling the arm over and down to strike the ball. Dumbell raises can help this. Flexibility is very important too. Most players who hit the ball hard end up with shoulder problems, if they don't warm up and stretch the shoulder muscles regularly.
lungs
Because the only way to move, other than falling down, is to use your muscles. That is their purpose.
none
Because we don't want to die.
To prevent your dog from injuring itself while jumping down stairs, you can install a pet gate at the top of the stairs to restrict access, provide training to teach your dog to use the stairs safely, or carry your dog up and down the stairs if necessary. Regular exercise and maintaining a healthy weight can also help reduce the risk of injury.