Garbutt G, Boocock M G, Reilly T, Troup J D
School of Pharmacology, Faculty of Science, Sunderland Polytechnic, England.
Med Sci Sports Exerc. 1990 Dec;22(6):769-72. doi: 10.1249/00005768-199012000-00006.
Decreases in stature (shrinkage) are used to indicate exercise induced spinal loading. This study examined the effect of three running speeds on two groups of runners, one with chronic low back pain. The two groups of seven male marathon runners ran at 70%, 85%, and 100% of their marathon race pace for 30 min on separate occasions. Before and after exercise the subjects were seated for 20 min with the lumbar spine supported. Stature was measured before pre-exercise sitting, before running, after 15 min of running, after 30 min of running, and after post-exercise sitting. A stadiometer accurate to within 0.5 mm was used to record changes in stature. Results showed no differences in response to the three running regimens between the groups (P greater than 0.05). Shrinkage was greater during the first 15 min, being 3.26 (+/- 2.78) mm compared with 2.12 (+/- 1.61) mm for the second 15 min of the run (P less than 0.05). The faster the running speed the greater the resultant shrinkage. The 70%, 85%, and 100% conditions caused 3.37 (+/- 2.38), 5.10 (+/- 1.90), and 7.69 (+/- 3.69) mm of shrinkage, respectively (P less than 0.005). These results suggest that low back pain is independent of the shrinkage induced by running. Further research is required to determine the effect of longer duration runs on spinal shrinkage.
身高降低（收缩）被用于指示运动引起的脊柱负荷。本研究考察了三种跑步速度对两组跑步者的影响，其中一组患有慢性下背痛。两组各有七名男性马拉松跑者，分别在不同时间以其马拉松比赛配速的70%、85%和100%跑30分钟。运动前后，受试者在腰椎得到支撑的情况下坐20分钟。在运动前坐姿前、跑步前、跑步15分钟后、跑步30分钟后以及运动后坐姿后测量身高。使用精确到0.5毫米以内的身高计记录身高变化。结果显示两组之间对三种跑步方案的反应没有差异（P大于0.05）。在跑步的前15分钟身高收缩更大，为3.26（±2.78）毫米，而跑步的第二个15分钟为2.12（±1.61）毫米（P小于0.05）。跑步速度越快，产生的收缩越大。70%、85%和100%配速条件下分别导致3.37（±2.38）、5.10（±1.90）和7.69（±3.69）毫米的收缩（P小于0.005）。这些结果表明下背痛与跑步引起的收缩无关。需要进一步研究以确定更长时间跑步对脊柱收缩的影响。
