Quadriceps
Leg Extensions
A machine exercise that isolates the quadriceps by extending your knees against resistance.
Primary musclesQuadriceps
Energy burned
≈ 26 kcalFor 3 × 8–12, rest 90s · ≈ 4.5 kcal/min
Estimate range 19–32 kcal (±25 %)
Muscle mass worked16 %
Effort during a set7.4 MET
Your lean mass53.5 kgBody fat estimated from BMI and age
Machine / cable: about 15 % less than free weights.
Estimate ±25 %: muscles worked (from the exercise data), sets, reps, rest and your body. See the planner for whole sessions.
Setup
- 1Adjust the seat so your knees line up with the machine's pivot and the pad rests on your lower shins.
- 2Sit back with your hips against the seat and grip the handles.
How to perform
- 1Extend your knees until your legs are nearly straight.
- 2Squeeze your quads at the top.
- 3Lower the weight slowly.
- 4Stop just before the stack touches down.
