Yes, you can engage and contract your stomach muscles while doing sit-ups to strengthen and tone your core.
Hamstrings and Quadriceps.
You can increase your muscles by doing regular exercise. gradually increasing resistance. following a proper diet and achieving proper rest...your muscles grow while resting not while working out....
Ideally your whole body will be used while doing aerobics. But the primary muscles involved will be your leg muscles (quadriceps, hamstrings, calves) and the muscles of your lower back, abdominal and but muscles.. The lung and heart muscles function at their optimum to compensate the stress on these muscle groups...
The muscles that are in your arms
you can build your abb muscles by doing sit ups and abb workouts also you can flex your abbs while you run or walk
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An exercise ball can be used to develop many different muscle groups. Placing one hand on an exercise ball while doing a push up will help develop the pectorial and latimus dorsi muscles. Doing a crunch while seated on an exercise ball will help develop oblique muscles.
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yes, you are putting to much strain on your back and not using your abdominal muscles to lift you
Back soreness after doing pushups can be caused by improper form, overexertion, or weak back muscles. It is important to ensure proper alignment and technique while doing pushups to prevent strain on the back muscles. Strengthening the back muscles through targeted exercises can also help alleviate soreness and prevent future discomfort.
of course