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Muscle growth can happen is you do muscle specific exercise which target many reps of the same exercise per muscle. You can also try increasing the amount of protein in your diet, either with diet or with protein powders.
It depends on the weight you're using. at your house etc.
Any excercise is good for your cardiac muscle. I'd suggest swimming and walking because they are gentle. Go ask an exercise expert or a doctor for specific details.
How stupid are you, you don't even know that. lol
You can easily tell muscle and fat apart by looking at them and touching the specific area of skin. Muscle is strong and hard, whereas fat is soft and flabby.
During exercise muscle cells use oxygen.
due to lack of oxygen
To help in muscle recovery by rebuilding damaged muscle tissue from exercise
The best way to exercise without building "short muscles" is swimming, running and other cardiovascular exercises. The best possible exercise for your joints, while toning your body is swimming.
exercise
Yes. Strenuous exercise can kill the muscle fibers. Such muscle fibers are replaced by fibrous tissue.
The primary muscle intended for exercise.