This study assessed the effect of combined jump training and collagen supplementation on bone mineral density (BMD) in elite road-race cyclists. In this open-label, randomized study with two parallel groups, 36 young (21 ± 3 years) male (n = 8) and female (n = 28) elite road-race cyclists were allocated to either an intervention (INT: n = 18) or a no-treatment control (CON: n = 18) group. The 18-week intervention period, conducted during the off-season, comprised five 5-min bouts of jumping exercise per week, with each bout preceded by the ingestion of 15 g hydrolyzed collagen. Before and after the intervention, BMD of various skeletal sites and trabecular bone score of the lumbar spine were assessed by dual-energy X-ray absorptiometry, along with serum bone turnover markers procollagen Type I N propeptide and carboxy-terminal cross-linking telopeptide of Type I collagen. BMD of the femoral neck decreased in CON (from 0.789 ± 0.104 to 0.774 ± 0.095 g/cm²), while being preserved in INT (from 0.803 ± 0.058 to 0.809 ± 0.066 g/cm²; Time × Treatment, p < .01). No differences between treatments were observed for changes in BMD at the total hip, lumbar spine, and whole body (Time × Treatment, p > .05 for all). Trabecular bone score increased from 1.38 ± 0.08 to 1.40 ± 0.09 in CON and from 1.46 ± 0.08 to 1.47 ± 0.08 in INT, respectively (time effect: p < .01), with no differences between treatments (Time × Treatment: p = .33). Serum procollagen Type I N propeptide concentrations decreased to a similar extent in CON (83.6 ± 24.8 to 71.4 ± 23.1 ng/ml) and INT (82.8 ± 30.7 to 66.3 ± 30.6; time effect, p < .001; Time × Treatment, p = .22). Serum carboxy-terminal cross-linking telopeptide of Type I collagen concentrations did not change over time, with no differences between treatments (time effect, p = .08; Time × Treatment, p = .58). In conclusion, frequent short bouts of jumping exercise combined with collagen supplementation beneficially affects femoral neck BMD in elite road-race cyclists.

这项研究评估了跳跃训练和胶原蛋白补充相结合对精英公路自行车运动员骨矿物质密度 (BMD) 的影响。在这项开放标签随机研究中，有两个平行组，36 名年轻（​​21 ± 3 岁）男性（n  = 8）和女性（n  = 28）精英公路自行车运动员被分配到任一干预组（INT：n  = 18) 或未治疗对照组 (CON: n  = 18) 组。为期 18 周的干预期在淡季期间进行，包括每周 5 次每次 5 分钟的跳跃运动，每次运动前摄入 15 克水解胶原蛋白。干预前后采用双能X线骨密度仪评估各骨骼部位的BMD和腰椎骨小梁评分，同时测定血清骨转换标志物IN型前胶原前肽和Type型羧基端交联端肽。我胶原蛋白。股骨颈的 BMD 在 CON 中下降（从 0.789 ± 0.104 至 0.774 ± 0.095 g/cm ²），而在 INT 中保持不变（从 0.803 ± 0.058 至 0.809 ± 0.066 g/cm ²；时间 × 治疗，p  < .01 ）。在整个髋部、腰椎和全身的 BMD 变化方面，治疗之间没有观察到差异（时间 × 治疗， 全部p > 0.05）。CON 中的骨小梁评分分别从 1.38 ± 0.08 增加到 1.40 ± 0.09，INT 中从 1.46 ± 0.08 增加到 1.47 ± 0.08（时间效应：p  < .01），治疗之间没有差异（时间 × 治疗：p  = . 33）。CON 组（83.6 ± 24.8 至 71.4 ± 23.1 ng/ml）和 INT 组（82.8 ± 30.7 至 66.3 ± 30.6）血清前胶原 IN 型前肽浓度下降程度相似；时间效应，p  < .001；时间 × 治疗，p  = .22）。血清 I 型胶原羧基末端交联端肽浓度不随时间变化，治疗之间没有差异（时间效应，p  = .08；时间 × 治疗，p  = .58）。总之，频繁的短时跳跃运动结合补充胶原蛋白有益于影响优秀公路自行车运动员的股骨颈 BMD。