Janet Turner
That sounds like a great exercise, but too hard for me I'm afraid.
Mountain climbers are an advanced, high intensity exercise that will get your heart rate up and add intensity to your workouts. This move will build leg endurance and help you work on agility as well, making it a great overall exercise.
If you've never tried this move, take your time and ease into it with slow reps. If you feel discomfort or pain, avoid this exercise. You'll need lots of core strength for this move, as well as upper body endurance.