You can cut or slow down your muscle loss by 3 - 5 % with
moderate resistance training or weight training, just by doing two full -
body workout sessions per week.
HIIT (high intensity interval training): Too much endurance / cardio work can actually rob your
body of testosterone, while
resistance training / lifting is shown to increase the production of T, but this has a drop off point where too much of either robs the
body; a
moderate amount of strength training and cardio together make the optimal blend to produce T. Lifting more than three times a week can actually slow your T production way down, so don't overdo it.