Support the weight of the trunk with the elbow, which should be vertically aligned and at the same height as the shoulder, and the knee.
Action:
1. Raise the upper leg and hips, up to the shoulder, hip and knee remain fully aligned to form a straight parallel line with the ground.
2. Maintain this position for 20-30 seconds.
3. Rest, switch sides and return to the starting position.
4. Repeat with side against the lateral.
5. Repeat the exercise three times.
