Kinetics

Assignment #2
1. Take the position of a runner in the starting blocks for a short running race. Place one foot forward and one foot back while placing your hands on the starting line.
a. In what position is the hip joint for the forward leg (flexed, extended)?
b. In what position is the hip joint of the back leg (flexed, extended)?
c. Now imagine the starter has fired the starting gun. Into what position did the hip joint of the forward leg move, and what muscles caused that movement?
d. Into what position did the hip joint of the back leg move, and what muscles caused that movement?

2. Perform the classic jumping jack exercise (from the feet together starting point)several times, observing the movements of the hip joint during the counts of 1 and 2.
a. Describe the position of both hip joints on the count of 1.
b. Which muscles were used to put the hips in that position in "a"?
c. Describe the position of both hip joints on the count of 2.
d. Which muscles were used to put the hips in that position in "b"?