During the eccentric phase, what is the primary muscle group involved in standing trunk flexion?
a. iliopsoas
b. rectus abdominis
c. erector spinae
d. biceps femoris
Answer: C
During the eccentric phase, what is the primary muscle group involved in standing trunk flexion?
a. iliopsoas
b. rectus abdominis
c. erector spinae
d. biceps femoris