The push-up to cross-body knee touch is a compound exercise that combines the benefits of a push-up and a core exercise. 

Here are some of the benefits:

1. Strengthens the chest: The push-up portion of the exercise targets the chest muscles, including the major and minor pectoralis, triceps, and shoulders.
2. Builds core strength: The cross-body knee touch portion of the exercise targets the core muscles, including the rectus abdominis, obliques, and transverse abdominis.
3. Improves balance and stability: The movement of bringing the knee across the body while in the push-up position challenges your balance and stability.
4. Increases cardiovascular endurance: Doing multiple reps of this exercise can increase your heart rate and improve your cardiovascular endurance.
5. Requires no equipment: The push-up to cross-body knee touch can be done anywhere and requires no equipment, making it a convenient and effective exercise for those who don’t have access to a gym or workout equipment.

The push-up to cross-body knee touch is a challenging and effective exercise that can help you build strength, improve your balance and stability, and boost your cardiovascular endurance.