Figure 4. Loading rates for novice barefoot runners, pre- (dark gray) and post-exertion (light gray), delineated by foot-strike group. RFS= rear-foot strike ; MFS = mid-foot strike; FFS = forefoot-strike. Boxes, median, first and third quartiles; whiskers, minima and maxima. (↔) Indicates a significant between group difference (*) Indicates a significant within group difference.