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.
Lean over and slide your hands underneath the sandbag.
In one motion, pull the weight up and sling it over your shoulder as you stand.