A lack of knee joint integrity may hold you back in middle splits. Improving knee joint integrity may help you get deepen your middle splits.
Screw Home Mechanism of The Knee Joint - Physiopedia
Half Side Splits
Middle Split with Knee Bends
Blog – Bent Knees in the Middle Split – Biggest Mistake – Coach
Yoga for Strength
Improving Flexibility
Adductor Stretches
Knee Pain in Middle Splits? Try These Adjustments — Dani Winks
So Much Psoas with Melina Meza
Creep behavior of human knee joint determined with high-speed
Intraoperative view of a left knee with the patellar tendon
Blog – Bent Knees in the Middle Split – Biggest Mistake – Coach
Yoga for Flexibility
Why Do My Knees Crack and Pop? - 6 Exercises for Knee Cracking