Clinical and Molecular Osteoporosis Research Unit, Department of Clinical Sciences and Orthopaedic Surgery, Malmö University Hospital, Lund University, Malmö, Sweden.
Int J Sports Med. 2010 Jul;31(7):511-5. doi: 10.1055/s-0029-1243616. Epub 2010 Apr 29.
Professional cycling combines extensive endurance training with non weight-bearing exercise, two factors often associated with lower bone mineral density (BMD). Therefore BMD was measured with dual-energy x-ray absorptiometry in 30 professional road cyclists (mean (SD) age: 29.1 (3.4) years; height: 178.5 (6.7) cm; weight: 71.3 (6.1) kg; %fat mass: 9.7 (3.2)%; VO (2)max: 70.5 (5.5) ml.kg (-1).min (-1)) and in 30 young healthy males used as reference (28.6 (4.5) years; 176.5 (6.3) cm; 73.4 (7.3) kg; 20.7 (5.8)%). Adjusting for differences in age, height, fat mass, lean body mass, and calcium intake by ANCOVA, professional cyclists had similar head BMD (p=0.383) but lower total body (1.135 (0.071) vs. 1.248 (0.104) g.cm (-2); p<0.001), arms (0.903 (0.075) vs. 0.950 (0.085), p=0.028), legs (1.290 (0.112) vs. 1.479 (0.138); p<0.001), spine (0.948 (0.100) vs. 1.117 (0.147) g.cm (-2); p<0.001), pelvis (1.054 (0.084) vs. 1.244 (0.142), p<0.001), lumbar spine (1.046 (0.103) vs. 1.244 (0.167), P<0.001), and femoral neck BMD (0.900 (0.115) vs. 1.093 (0.137), p<0.001) compared to reference subjects. Professional cycling appears to negatively affect BMD in young healthy and highly active males, the femoral neck being the most affected site (-18%) in spite of the elevated muscle contractions inherent to the activity.
职业自行车运动结合了广泛的耐力训练和非承重运动，这两个因素通常与较低的骨密度（BMD）有关。因此，通过双能 X 射线吸收法测量了 30 名职业公路自行车运动员（平均（SD）年龄：29.1（3.4）岁；身高：178.5（6.7）厘米；体重：71.3（6.1）公斤；%脂肪量：9.7（3.2）%；最大摄氧量（VO2）：70.5（5.5）ml.kg（-1）.min（-1））和 30 名年轻健康男性作为参考（28.6（4.5）岁；176.5（6.3）厘米；73.4（7.3）公斤；20.7（5.8）%）。通过协方差分析调整年龄、身高、脂肪量、瘦体重和钙摄入量的差异，职业自行车运动员的头部 BMD 相似（p=0.383），但总身体（1.135（0.071）与 1.248（0.104）g.cm（-2）；p<0.001）、手臂（0.903（0.075）与 0.950（0.085），p=0.028）、腿部（1.290（0.112）与 1.479（0.138）；p<0.001）、脊柱（0.948（0.100）与 1.117（0.147）g.cm（-2）；p<0.001）、骨盆（1.054（0.084）与 1.244（0.142），p<0.001）、腰椎（1.046（0.103）与 1.244（0.167），P<0.001）和股骨颈 BMD（0.900（0.115）与 1.093（0.137），p<0.001）与参考组相比。职业自行车运动似乎会对年轻健康和高度活跃的男性的 BMD 产生负面影响，尽管活动中固有的肌肉收缩会增加，但股骨颈是受影响最严重的部位（-18%）。
