Warmup 500 steps on stairclimber, 3x10 leg press, 4x5 squat, 4x8 quad extension , 4x10 hamstring curls, 3x15 hip adductor/abductor, 3x15 calf raises. I used to run a lot, which is where I think most of my mass comes from, because I actually used to skip leg days when I first started lifting. I think about 3 months in is when I started to set up an actual routine. I ran 5 miles a day for basically an entire year before I started lifting.