Laroche Marie-Andrée, Chassé Étienne, Théoret Daniel, Lalonde François, Comtois Alain-Steve
Personnel Support Program, Canadian Forces Leadership and Recruit School, Richelain, QC J0J 1R0, Canada.
Department of Exercise Sciences, Faculty of Sciences, Université du Québec à Montréal, Montréal, QC H2X 3Y7, Canada.
Mil Med. 2023 Jul 22;188(7-8):e2018-e2025. doi: 10.1093/milmed/usac334.
Optimizing training load (TL) and sleep is essential to maximize physical performance and prevent musculoskeletal injuries (MSKIs) for Canadian forces recruits during the 10-week basic military qualification (BMQ) course. The purpose of this study was to assess the TL, sleep duration, the occurrence of MSKIs during the BMQ, and the operation fitness performance during the BMQ.
Forty Canadian recruits, eight females and 32 males, (age 24 ± 5 years; height 176.4 ± 10.4 cm), were monitored with an accelerometer (GENEActiv) on their wrist between weeks 1 and 9 to evaluate the TL and sleep duration. During weeks 2 and 10, the recruits completed an operational fitness evaluation. Injury surveillance was performed over 10 weeks.
TL intensity was significantly different (P = 0.0001) from week to week. The weekly average total time of moderate and vigorous physical activity was 189.7 ± 48.1 min and 44.7 ± 15.2 min, respectively. The average sleep duration was 5.4 ± 0.4 h per night and decreased to 4.2 h ± 0.4 during field exercises. A significant difference in sleep duration was observed between recruits with and without a MSKI. The recruits accumulated a total of 95 days under medical restrictions with an average of 3.8 consecutive days. The VO2peak estimated from the Fitness for Operational Requirements of Canadian Armed Forces Employment job-based simulation test significantly improved from weeks 2 to 10 (pre, 47.1 ± 6.3; post: 50.2 ± 5.8; P = 0.001).
TL is of high magnitude and varies from week to week. The reported mean sleep duration per week may perhaps negatively impact the occurrence of MSKI. No significant improvement was detected in operational fitness by the end of the BMQ.
优化训练负荷（TL）和睡眠对于加拿大军队新兵在为期10周的基础军事资格（BMQ）课程中最大限度地提高身体表现和预防肌肉骨骼损伤（MSKI）至关重要。本研究的目的是评估BMQ期间的训练负荷、睡眠时间、MSKI的发生率以及BMQ期间的作战体能表现。
40名加拿大新兵，8名女性和32名男性，（年龄24±5岁；身高176.4±10.4厘米），在第1周和第9周期间用手腕上的加速度计（GENEActiv）进行监测，以评估训练负荷和睡眠时间。在第2周和第10周期间，新兵完成了一次作战体能评估。在10周内进行了损伤监测。
训练负荷强度每周有显著差异（P = 0.0001）。每周中等强度和剧烈身体活动的平均总时间分别为189.7±48.1分钟和44.7±15.2分钟。平均睡眠时间为每晚5.4±0.4小时，在野外训练期间降至4.2±0.4小时。有和没有MSKI的新兵之间观察到睡眠时间有显著差异。新兵在医疗限制下总共积累了95天，平均连续3.8天。根据加拿大武装部队就业基于工作的模拟测试的作战体能要求估计的VO2峰值从第2周到第10周有显著改善（之前，47.1±6.3；之后：50.2±5.8；P = 0.001）。
训练负荷强度大且每周变化。报告的每周平均睡眠时间可能会对MSKI的发生产生负面影响。到BMQ结束时，作战体能未发现显著改善。
