Build mass, strength, endurance, bicep peak, tricep v, thicker neck, increase vascularity, building forearms, calves, lats v, abs, obliques, pelvic v-cut, inner thigh, bicep brachii, chest, jump higher, explosive sprints, shin splints, knee and shoulder c

portable electronic devices for measuring vertical jump height, timing lateral movement, measuring explosive leg power, measuring reaction time, timing dashes, and timing sprints