1. On the run, for a split second, stop and put your feet together.
2. Bend down quickly, exhaling, and reach the floor with your fingers (you can use your palms). Do not bend your knees.
3. Just as quickly straighten up and continue running.
4. Repeat inclinations from 10 to 30 times with an interval of 4-10 steps.
Exercise involves many muscles, especially the abdominals and back. This helps to strengthen the whole body and develops dexterity. If the performance of the exercise will be intense, the muscles will work in anaerobic mode, i.e. without oxygen due to internal energy reserves. To a reasonable extent, this is useful, since the body's ability to act in this anoxic mode increases, and metabolism improves.
Text: From Ar Eddar's book "The Beginning of Hatha Yoga"