This move not only strengthens your legs and chisels your core but also fires up your hard-to-ignite fast-twitch muscles. Better yet, a few sets of ninja jumps with a sandbag throw tossed in make for a total-body workout in just a few minutes. Try three sets of five reps and you'll feel the burn all day long.
The 5-Minute Full-Body Workout
Master the ninja jump and get ripped—fast.
The gear to get.
If you're in the market for a sandbag system, you need to make sure it can stand up to repeated wear and tear. The Ultimate Sandbag pictured here is made out of military-grade materials and comes with seven handles, which make it incredibly versatile. It can hold 30 to 85 pounds of sand, and if that's too light, it comes in larger versions. $130; henkinfitnesssystems.com