Fig. 8. Frequency distributions of strain magnitudes for the cranial, caudal and medial surfaces of the radius. Details of these distributions and the values shown are the same as in Fig. 7. Though all six distributions are skewed to the right and appear to fit a lognormal distribution, only the caudal surface during outdoor locomotion (C; P=0.15) and the medial surface during treadmill locomotion (F, P=0.15) are not significantly different than a standard lognormal distribution. As in the metacarpus, all of the outdoor distributions had smaller deviations (according to the D statistic) from the log-normal curves than the corresponding treadmill distributions, probably because the larger sample size for the outdoor data.