Get in a lying position and stretch your legs straight up. Then, you need to move the fingertips away and draw the heels near. Before straightening the knees by tensing the muscles, slowly bend them.
Do 3 cycles of 10 exercises. Between the cycles, take a one minute break.
By keeping your hands on the ground, lie on your back. Before crossing the feet 10 times in scissor-like movements, raise them about 30cm high.
You need to start moving each leg up and down at least 10 times. Do not take breaks. You need to be able to make 3 circles without touching the ground with your feet.