Foot strike patterns of runners at the 15-km point during an elite-level half marathon

摘要: There are various recommendations by many coaches regarding foot landing techniques in distance running that meant to improve performance and prevent injuries. Several studies have investigated the kinematic kinetic differences between rearfoot strike (RFS), midfoot (MFS), forefoot (FFS) patterns at their effects on efficiency a treadmill over ground conditions. However, little is known about actual condition of pattern during an road race elite level competition. The purpose present study was document half marathon which international runners, including Olympians, compete. Four hundred fifteen runners were filmed 2 120-Hz video cameras height 0.15 m placed 15.0-km point obtained sagittal taking off images for 283 runners. Rearfoot observed 74.9% all analyzed MFS 23.7%, FFS 1.4%. percentage higher faster group, when ranked divided into 50 runner groups In top 50, included up 69th place order who passed 15-km 45 minutes, 53 second (this speed represents 5.45 x s(-1), or 15 17 seconds per 5 km), RFS, MFS, 62.0, 36.0, 2.0%, respectively. Contact time (CT) clearly increased slower placement (r = 0.71, p < 0.05). CT RFS + every group significantly with increase order. longer than (200.0 +/- 21.3 vs. 183.0 16 millisecond). Apparent inversion (INV) 42% INV (62.5, 32.0, 50%, respectively). shorter without RFS. Furthermore, push-off findings this indicate related speed. increases decreasing speed; conversely, as increases. A contact frequency might contribute economy.