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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
In the muscles of a body while doing exercises or else.
you can build your abb muscles by doing sit ups and abb workouts also you can flex your abbs while you run or walk
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.
you can put a turtle in a tank with no cover and it wont crawl out while you are sleeping
Cleveland elementary is smarter than miner elementary because Cleveland elementary is the top elementary school while miner elementary is the tenth!
yes, you are putting to much strain on your back and not using your abdominal muscles to lift you
of course
Muscles that are used while doing High Knees are Hamstrings