There is no specific answer to this question. It all depends on what you are wanting to improve on your body. i.e. if you want to work on your chest muscles, you should be doing dumbbell butterfly's. If you want to work on your arms, you should be doing curls. Not everything is to be done on a bench. You should try some push ups and crouches as well.
I guess when you are doing stretching exercises, at that time yoou may feel pain or you may not be comfortable.
yes somehow it is but it could be cured by doing meditation or some kind of brreathing exercises.
There are many exercises a person with a knee injury can do. Doing aerobic or endurance exercises can help. There have been studies that show that aerobic exercises help reduce inflammation, so those should help you.
It varies depending on what kind of exercises you are doing and if you are giving it everything you got.
There are many exercises you can perform with weight machines , sometimes they even have some examples in the manual it comes with , and some even include a DVD on how to do the exercises right and which ones you should be doing .
If the lower ab exercises are being done properly they should not strain the back. It is important to stretch prior to doing the exercises or the likelihood of straining the back will increase.
I think you could add heavy weights to any kind of exercise to make it more difficult. other than that I can't readily think of extreme exercises.
No it isn't
There are of course the common daily stretches that she can do. She could also do superman exercises to strengthen her lower back. She should also try doing yoga as well.
You should exercises your heart as much as possible but you have to exercises at least 3-4 days a week for like 4hrs each time.
There are no exercises that will increase the size.
Exercising doesn't stunt growth. That's an old wive's tale with no sort of evidence. There's no age too young to begin doing basic abdominal exercises. Be sure to be supervised when doing exercises involving weights.