Evans et al. (A-5) examined the effect of velocity on ground reaction forces (GRF) in dogs with lameness from a torn cranial cruciate ligament. The dogs were walked and trotted over a force platform and the GRF recorded (in newtons) during the stance phase. The following table contains 22 measurements of force expressed as the mean of five force measurements per dog when walking and the mean of five force measurements per dog when trotting. Use the GRF value when walking to predict the GRF value when trotting.
GRF-Walk GRF-Trot GRF-Walk GRF-Trot 31.5 50.8 24.9 30.2 33.3 43.2 33.6 46.3 32.3 44.8 30.7 41.8 28.8 39.5 27.2 32.4 38.3 44.0 44.0 65.8 36.9 60.1 28.2 32.2 14.6 11.1 24.3 29.5 27.0 32.3 31.6 38.7 32.8 41.3 29.9 42.0 27.4 38.2 34.3 37.6 31.5 50.8 24.9 30.2 Source: Data provided courtesy of Richard Evans, Ph.D.