The One-Leg L-Sit on the parallettes is a challenging exercise that primarily targets the abdominal muscles, hip flexors, and supporting muscles. In this exercise, the athlete assumes an L-position, keeping one leg straight while bending the other. It requires a high level of body tension, strength, and balance.

The one-legged variation serves as a preparatory exercise for the classic L-Sit, where both legs are extended. Holding this position engages the abdominal muscles even more intensely.

An even easier progression is the Tuck L-Sit, where both legs are bent and pulled close to the body. This reduces the lever arm, making it easier to hold the position while still engaging the core and supporting muscles.

In the supported L-Sit, the legs are extended with the heels resting on the ground. Compared to the regular L-Sit, where the legs are fully lifted off the ground, the supported version is ideal for beginners, as it requires less core strength while still preparing the upper body for the proper L-Sit. Another easier variation is the Tuck L-Sit, where the knees are drawn toward the chest.

Knee raises primarily train the abdominal muscles and hip flexors, similar to the L-Sit or leg raises. During the exercise, the knee is pulled up to the chest while keeping the upper body upright. This exercise can be performed while standing or hanging from a pull-up bar.

Knee raises can be done with different equipment. In the parallel bars variation, the arms stabilize the body, which intensively engages the shoulder and core muscles.

The L-sit is a well-known exercise from gymnastics that is also very popular in calisthenics. It requires strong abdominal muscles, some flexibility in the back of the legs, strength in the hip flexors, and stability in the shoulder girdle. Depending on the training equipment used for the L-sit, the exercise can be easier or more difficult.