Yeah they are pretty heavy for me, after about 7kg I struggle.

I'm looking to bulk up a lot, I'm currently about 5'11 and 120lb, age 16. I can only really exercise at home at the moment (could run but surely that wouldn't help me bulk up?) with a set of spinlock dumbbells weighing 15kg (33lb.) Basically I could use a routine as I know almost nothing. Time isn't...