Which of the following would be typical for vertical ground reaction force (GRF) during running? Naim 14:07 Biomechanics Chapter 12 Which of the following would be typical for vertical ground reaction force (GRF) during running? A. GRF = body weight B. GRF = 2 × body weight C. GRF = ½ body weight D. None of the above Answer: B Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+