This MOST likely indicates tightness in which muscles?

When assessing a client’s hip flexion using a passive supine straight-leg raise, an ACE certified Personal Trainer discovers there is less than 80 degrees of motion on both the right and left sides.

This MOST likely indicates tightness in which muscles?
A . Iliopsoas
B . Hamstrings
C . Adductor magnus and brevis
D . Gluteus medius and minimus

Answer: A