L holds are one of the most effective ways to train the core and also get compression strength. While the basic 2 legged L hold is often what people think of and jump to, the truth is that even a basic L hold is extremely challenging to do well with good technique. To help out with that, versions trying tucked knees, one bent knee, or alternating knees can be really good starting points. Then over time, athletes can progress through to reach the next difficulty level until they get the full L li