Androstenediol does not seem to help increase muscle size or strength.

In fact, only now is a study being conducted to see if any of these supplements increase muscle size.

Although muscle size and strength are related, size alone is not representative of fitness.

Moreover, most individuals wish to develop a combination of strength, endurance and muscle size.

It was a place for hard work, accomplishment, renewed strength and increased muscle size.

Strength gains are experienced by subjects without any increased muscle size.

"Among the old," the researchers write, "neither prescription was sufficient to maintain the gains in muscle size."

Studies have shown that they don't increase testosterone levels, strength, muscle size, or performance.

If you haven't started puberty, you'll still get strong, but your muscle size won't increase that much.

The mice show greater than normal muscle size and strength and do not lose it as they age.