Hang from your arms and pull your upper body to a horizontal position, while keeping the arms fully straight.
Keep one leg extended horizontally, while the other leg is tucked towards your chest.
The primary muscles work equally regardless of which leg you extend, so it is not necessary to count the exercise as unilateral: it is enough to alternate the legs with each set.
Form tips
The body should be horizontal, with the shoulders, hips and the straight leg on the same line.
Keep your arms fully straight.
Do not let your upper back round.
Engage your scapulas: try to retract your shoulders , so that they end up in a neutral position.