Cardio-vascular work
Global muscular work
              (Lower and upper limbs, spinal stomach muscles)

Rolling up your shoulders and back when getting back to the original position
Lumbars too arched

 

Your feet must be tied up
You must bend your upper limbs while stretching your lower limbs.
Watch ahead
Upper limbs :
   Do not stretch entirely your elbows when getting back to the original position.
Be careful
Do not stretch your knees when pulling
Do not block your heels or stretch your elbows while getting back to the original position.

           You can choose the length, intensity and execution speed of this exercise depending on your capacities and objectives.