Want the most bang for your buck when it comes to a quick and effective workout? Mountain Climbers are a killer endurance, core and cardio workout, while firing up nearly every muscle group in the body—deltoids, biceps, triceps, chest, obliques, abdominals, quads, hamstrings and hip abductors. It’s truly a fully body workout! Mountain Climbers are also very accessible. You can perform them anywhere because they require only your bodyweight (add a stability ball and resistance bands to increase intensity. You’ll be dripping sweat in no time.)

Mountain Climber w/ Stability Ball (and added resistance from the Kinetic Bands)

1. Begin in a pushup position, with your weight supported by your hands and feet on the stability ball. Flexing the knee and hip, bring one leg until the knee is approximately under the hip. This will be your starting position.

2. Explosively reverse the positions of your legs, extending the bent leg until the leg is straight and supported by the ball of your foot and bringing the other foot up with the hip and knee flexed. Repeat in an alternating fashion for 20-30 seconds. Change the speed of movement for a challenge.