How to do a 45° Back Extension (Hamstring Emphasis)
Perform 45 degree extension reps with a neutral spine (rather than with a slightly flexed spine for glute emphasis). Maintenance of neutral pelvis & spine will allow hamstrings to work more dominantly than the glutes.
Muscles used in a 45° Back Extension (Hamstring Emphasis)
Lower Back, Hamstrings
Movement patterns used in a 45° Back Extension (Hamstring Emphasis)
Hinge