discuss. But seriously, why dont more people swim or jump rope instead of or in addition to running? Is it because swimming uses too much upper body strength and so isnt optimal on off days of lifting? Is it just because we associate jumping rope with teh gay? Why does everybody think of running first? I know its hella convienent, but then mutherfuckers go out and buy a tredmill, which is like, the opposite of convienent. Buy a bad ass jump rope=15 bucks, max.