3. Jackknife crunches:
This is a more challenging variety for the classic crunches because you’ll need strong core to support and sustain the form. Targeting the abdominal muscles, it helps in defining those 6 packs in your abs. You can burn 200 calories in 20 minutes of doing jackknife crunches!
You can consume or burn 1000 calories by doing 1 hour of these three exercises. You can lose up to 5 kg of your weight in 20 days by doing these exercises daily. However, do consult your physiotherapist or physician before starting these exercises. It is recommended to perform stretching exercises both before and after you do the exercise. Take a break of 5-10 minutes in between each set of exercise.