The Mountain Climber
One of my favorite exercises to get my heart rate pumping is the mountain climber.
It is great to add to any workout to elevate your heart rate and help work on stability through the trunk and shoulders. If you notice, there is no bouncing in my mountain climber, this should be the goal! A proper plank position should be maintained throughout.
Here's How to do it
Start in a push-up position
Drive one knee in towards your chest, not letting your toe touch the ground
As you are kicking that leg back to the starting position go ahead and drive the opposite knee to your chest.
Don't let your torso move through the exercise
If you are a beginner start with doing these for 15s and if you are loking for more of a challenge try and go for 30s