What is the vertical ground reaction force for running speeds up to 6m/s?
a. one to two-fold the body weight
b. two to three-fold the body weight
c. three to five-fold the body weight
d. varies by individual based on body weight and gait abnormalities
Answer: b. two to three-fold the body weight
The vertical ground reaction force for running speeds up to 6m/s is two to three times the body weight. They occur during the heel strike and push-off phases.