The Voxlova Weighted Jump Rope ($17, originally $19) clocks in at one full pound and is the perfect way to build aerobic endurance and lung capacity without working out for hours at a time. Like many of the products on this list, this item is adjustable, but it's the rope's extra thick diameter and synthetic rubber coating that differentiates it from the pack. These added features prevent wear during sustained use and keep the rope from becoming tangled during storage.