LEG CURL MACHINE – RESEARCH
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MRI STUDY
BICEPS FEMORIS LONG HEAD, SEMITENDINOSUS, GRACILIS & SARTORIUS
– Seated Leg Curl vs. Prone Leg Curl
Greater Hamstrings Hypertrophy but Similar Damage Protection after Training at Long vs Short Muscle Lengths – 2021 – Maeo
Results – Change in Cross Sectional Area
Biceps femoris long head – Proximal: seated leg curl 20% . prone leg curl 10%
– Biceps femoris long head – Distal:: seated leg curl 10% . prone leg curl 5%
Semitendinosus – Proximal: seated leg curl 28% . prone leg curl 20%
– Semitendinosus – Distal: seated leg curl 21% . prone leg curl 17%
Results – Change in Muscle Volume
Semitendinosus: seated leg curl 24% . prone leg curl 19%
Gracilis: seated leg curl 22% . prone leg curl 20%
Biceps Femoris – Long Head: seated leg curl 13% . prone leg curl 12%
Biceps Femoris – Short Head: seated leg curl 10% .prone leg curl 8%
Semimembranosus: seated leg curl 8% .prone leg curl 4%
Sartorius: seated leg curl 12% . prone leg curl 7%
ISOKINETIC STUDY
KNEE EXTENSION TORQUE & KNEE FLEXION TORQUE
– Ankle Plantar Flexed or Dorsi Flexed
Differential effects of ankle position on isokinetic knee extensor and flexor strength gains during strength training – 2016 – Kim
Procedure
– trained isokinetically and concentrically in knee extension and flexion 4x/week for 3 weeks
– dorsiflexion is toes up; plantarflexion is toes pointed
Strength Gains
Knee Extension: dorsiflexion . plantarflexion
Knee Flexion: dorsiflexion . plantarflexion