by POPSUGAR Fitness 0

There are lots of exercises you can do that really work your body without having to use a machine, weights or accessories. One of my favorites is the Mountain Climber, because it's a great exercise for the lower body muscles, the core, and it's also a great form of cardio.
Here's how to perform it:

• Start in a traditional push-up starting position — shoulders over hands and weight on just your toes.
• Bring your right foot forward, bending the knee and putting weight on the ball of your foot.
• Switch legs bringing the left knee forward while moving the right leg back. It feels a little like running in place in a plank position.

Fit's Tips: Make sure to keep the head in line with the body and the stomach muscles contracted throughout the entire range of motion. Start by moving consistently for 30 seconds without stopping. Pick up your pace as you get used to the movement.