http://timinvermont.com/fitness/boosttes.htm
The normal level of testosterone in your bloodstream is between 350 and 1,000 nanograms per deciliter (ng/dl). Like combable hair, those quantities silently start to wane around age 40. You lose about 1 percent a year -- a harmless decline in the...
average
effective
erection
erections
exercise
fitness
gain
hydromax
impotence
libido
question
research
serum
sex
short
shrinkage
symptoms
testicles
weight gain
workload
workout
Another training method is hypertrophy. It is too long for me to explain so here is a link to an article on it.
http://www.hypertrophy-specific.com/hst_index.html