you know those t-shirt sites where people can design and market their own tees? like 'designbyhumans' or whatever? (or even cafepress I suppose, even though they kind of suck.) I used to know one that was just like 'designbyhumans' except it was only band shirts. like for the type of bands that...
I am a sprinter but I am doing XC this year because my best friend does it and I want it to benefit my track season.
i've done a crapload of sprint workouts, and notcied a considerable gaining of muscle mass... am I going to lose all my sprint-work with the longer-ran xc workouts?
is it a bad...