What Is the Effort (E) and What Is the Resistance

Multiple Choice

What is the effort (E) and what is the resistance (R) acting on the femur during flexion of the knee of the supporting leg when going down a step?

A) E = concentric contraction of the hamstring, R = weight
B) E = concentric contraction of the vasti, R = weight
C) E = weight, R = eccentric contraction of the hamstrings
D) E = weight, R = eccentric contraction of the vasti