Contract-relax is tensing a muscle briefly and then letting it go and lengthen, the family of methods 📝Resisted Soft-Tissue Release belongs to.
In this library it is a generic method, not a named certification. A short hold of effort, then a let-go, then more range if it is available. It is not a claim the muscle has been reset. Effort stays light. If the person cannot let go, the dose was already too high.
Clients feel work, then ease. Fighting the let-go is the miss.