16/02/2026
Want more quad growth without adding more sets?
Try this small tweak on your leg extensions!
A recent paper by Larsen et al. (2024) compared leg extensions performed at 40° vs 90° of hip flexion and found something interesting:
💪 Re**us femoris growth was greater at 40° hip flexion
💪 Vastus lateralis growth was the same at both angles
Why?
➡️The re**us femoris crosses both the hip and the knee. The authors hypothesized that sitting more reclined (~40° hip flexion) places it in a more lengthened position, which leads to greater muscular hypertrophy.
➡️The vasti muscles don’t cross the hip, so changing hip angle doesn’t meaningfully affect their length, or their growth.
Practical takeaway:
💡You don’t need to reinvent the leg extension. Just try moving the seat back and leaning slightly backwards instead of forwards. Same exercise, yet better stimulus for one of quad muscles.
Small setup change. Potentially bigger quads. 💪
Source: Larsen et al. (2024), Journal of Sports Sciences