Gi Intermediate
The IBJJF's own explanation of the leg-reap rules, the reference for what is legal in gi competition.
Concepts
Leg Lock Concepts and Safety
How leg locks injure, which are legal under which rule sets and belts, and the principles behind entries, control and escapes.
Also called leg lock principles, leg lock rules, leg lock safety, are heel hooks legal.
Where it shows up
Related techniques
Resources
5 resources
YouTube videos
Gi & no-gi Intermediate
Stephan Kesting on IBJJF-legal leglocks and how to do them: which attacks are legal at which belt, and why heel hooks are treated differently.
No-gi Intermediate
Lachlan Giles on the inside heel hook: setup, safety and the control that has to exist before you crank anything. Also the best short explanation of how the position injures.
No-gi Intermediate
Danaher's four-part leg-lock system: entry, control, finish and the safety rules that sit under the heel hook.
Gi Intermediate
Legal footlocks under the 2025 IBJJF rules, a short competitor-facing summary.