Looking for a fun workout that incorporates the TRX Suspension Trainer into an Premier Global NASM Optimum Performance Training™ (OPT™) Phase 1 program? We’re sharing this OPT Phase 1 Stabilisation Endurance program with you – it’s great for the generally fit and healthy client with knees that may move inwards during an overhead squat assessment. Be sure to modify to best meet your client’s needs with appropriate progressions or regressions.