Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, VIC3000, Australia.
Olympic Winter Institute of Australia, Docklands, Melbourne, Australia.
Br J Nutr. 2022 Apr 28;127(8):1204-1213. doi: 10.1017/S0007114521001860. Epub 2021 Jun 3.
Cycling is a sport characterised by high training load, and adequate nutrition is essential for training and race performance. With the increased popularity of indoor trainers, cyclists have a unique opportunity to practice and implement key nutritional strategies. This study aimed to assess carbohydrate (CHO) intake of cyclists training or racing in this unique scenario for optimising exercise nutrition. A mixed-methods approach consisting of a multiple-pass self-report food recall and questionnaire was used to determine total CHO intake pre, during and post-training or racing using a stationary trainer and compared with current guidelines for endurance exercise. Sub-analyses were also made for higher ability cyclists (>4 W/kg functional threshold power), races v. non-races and 'key' training sessions. Mean CHO intake pre and post-ride was 0·7 (sd 0·6) and 1·0 (sd 0·8) g kg/BM and 39·3 (sd 27·5) g/h during training. CHO intake was not different for races (pre/during/post, P = 0·31, 0·23, 0·18, respectively), 'key sessions' (P = 0·26, 0·89, 0·98) or higher ability cyclists (P = 0·26, 0·76, 0·45). The total proportion of cyclists who failed to meet CHO recommendations was higher than those who met guidelines (pre = 79 %, during = 86 %, post = 89 %). Cyclists training or racing indoors do not meet current CHO recommendations for cycling performance. Due to the short and frequently high-intensity nature of some sessions, opportunity for during exercise feeding may be limited or unnecessary.
骑行是一项以高训练负荷为特点的运动，充足的营养对于训练和比赛表现至关重要。随着室内训练器的普及，骑行者有机会实践和实施关键的营养策略。本研究旨在评估在这种独特场景下训练或比赛的自行车手的碳水化合物（CHO）摄入量，以优化运动营养。采用多次自我报告的食物回忆和问卷调查的混合方法，使用固定训练器确定训练或比赛前后的总 CHO 摄入量，并与耐力运动的当前指南进行比较。还对能力较高的自行车手（>4 W/kg 功能阈功率）、比赛与非比赛以及“关键”训练进行了亚组分析。骑行前和骑行后的平均 CHO 摄入量分别为 0.7（sd 0.6）和 1.0（sd 0.8）g/kg/BM，训练期间为 39.3（sd 27.5）g/h。比赛时的 CHO 摄入量没有差异（赛前/赛中/赛后，P = 0.31、0.23、0.18），“关键课程”也没有差异（P = 0.26、0.89、0.98）或能力较高的自行车手（P = 0.26、0.76、0.45）。未能满足 CHO 建议的自行车手比例高于符合指南的自行车手（赛前 = 79%，赛中 = 86%，赛后 = 89%）。室内训练或比赛的自行车手不符合当前的 CHO 建议以提高骑行表现。由于某些课程的持续时间短且强度高，运动中进食的机会可能有限或不必要。
