you should NOT use any weights on your ankles it's bad for the connective tissues in your knees and ankles. if you really want to put weight on your legs there are some that attach to your thighs however you can do damage to your hips.
i suggest adding some sprints...helps w/ explosiveness. also some bleachers training.
if you need some specific suggestions on sprints etc let me know i can tell you what i do.
|