For best results, be sure to bring the knee toward the chest using the fullest range of motion possible while still maintaining good form.
Mountain Climbers may be performed using a stability ball to work more on balance and upper body strength. With this option, the hands or the forearms rest on the ball while the legs are in motion. The smaller the stability ball that is used, the greater the degree of difficulty.
As an alternative to counting the number of repetitions, a fun challenge is to time each set to see how many seconds you are able to continue the exercise. Being able to add seconds as you get stronger is a great reminder of how well you are progressing and helps to keep you motivated.
Keep in mind that not all exercises are right for everyone. If unsure, talk to your doctor before beginning a strengthening program.
Although core exercises can be performed every day, frequency depends on factors such as fitness level and degree of intensity. The greater the intensity, the greater the muscle breakdown and need for additional rest and recovery before the next workout.