jdrocks, i had a few more questions for you:
I am 14 and slim and a hardgainer, is this a good workout for me? I have been working out for about 4 or 5 months. Will this make me lose more weight or will this make me gain mass ( i really want to gain mass )?
I play football, basketball, and baseball. is this a good workout for these sports?
which is better; the dumbbells or resistance bands for gaining as much mass as possible?