What are peoples thoughts on weights? I did weighs before my half last year but stopped when I did my marathon ramp up, and really felt like I noticed it towards the end of my marathon. I especially noticed it on my upper body form. This year I'm planning on at least doing my upper body and core stuff, but an torn on the legs. Maff says not to, but a lot of people say it can really help, especially in injury prevention. I do low weight high rep stuff. But when doing legs I know my HR gets up there, since I do vet little rest. Should I just resign myself to week hamstrings to best listen to Uncle Phil and cut out the leg workouts? Or maybe continue doing it with no dumbbells in hopes of keeping my HR down and maybe increase rest? (it's all lunges, squats, calf raises and stuff)