Escamilla, Rafael F.; MacLeod, Toran D.; Wilk, Kevin E.; Paulos, Lonnie; Andrews, James R. (2012). "ACL Strain and Tensile Forces for Weight Bearing and Non—Weight-Bearing Exercises After ACL Reconstruction: A Guide to Exercise Selection". Journal of Orthopaedic & Sports Physical Therapy. 42 (3): 208–220. doi:10.2519/jospt.2012.3768. PMID22387600.
"Leg extension, machine". gluteus-maximus: muscle building, weight loss, training, nutrition. Archived from the original on 2022-03-31. Retrieved 2022-03-31.
Escamilla, Rafael F.; MacLeod, Toran D.; Wilk, Kevin E.; Paulos, Lonnie; Andrews, James R. (2012). "ACL Strain and Tensile Forces for Weight Bearing and Non—Weight-Bearing Exercises After ACL Reconstruction: A Guide to Exercise Selection". Journal of Orthopaedic & Sports Physical Therapy. 42 (3): 208–220. doi:10.2519/jospt.2012.3768. PMID22387600.
"Leg extension, machine". gluteus-maximus: muscle building, weight loss, training, nutrition. Archived from the original on 2022-03-31. Retrieved 2022-03-31.