Which of the following lower-body exercises is a single-joint exercise?
A) barbell back squat
B) leg extension
C) leg press
D) barbell lunge

Question

Quizplus · Accepted Answer

A single-joint exercise targets only one joint and works only one muscle group at a time. The leg extension is a single-joint exercise that isolates the quadriceps muscle group by flexing the knee joint. The other options listed are multi-joint exercises that engage multiple muscles and joints simultaneously.

Which of the Following Lower-Body Exercises Is a Single-Joint Exercise