Position leg extension exercises.

Isolation Series - Leg Curl/Extension - GR639

PDF) Posterior muscle chain activity during various extension exercises: An observational study

Leg extension - Wikipedia

Straight Leg Raise: Tips and Recommended Variations

Position trunk extension exercises.

Jessica VAN OOSTERWIJCK, Professor (Associate), PhD Rehabilitation Sciences, Ghent University, Gent, UGhent, Department of Rehabilitation Sciences and Physiotherapy

Adjustable Plate Loaded Leg Extension and Curl Machine - Rotary Specialty Machine Develops Quads and Hamstrings

Leg Extension VS Leg Press - N1 Training

Muscle functional MRI analysis of trunk muscle recruitment during extension exercises in asymptomatic individuals - De Ridder - 2015 - Scandinavian Journal of Medicine & Science in Sports - Wiley Online Library

PDF) Muscle functional MRI analysis of trunk muscle recruitment during extension exercises in asymptomatic individuals

PDF) Posterior muscle chain activity during various extension exercises: An observational study