Schantz Peter, Salier Eriksson Jane, Rosdahl Hans
Research Unit for Movement, Health and Environment, The Åstrand Laboratory and Laboratory of Applied Sport Science, The Swedish School of Sport and Health Sciences, GIH, Stockholm, Sweden.
Front Sports Act Living. 2020 Jun 30;2:65. doi: 10.3389/fspor.2020.00065. eCollection 2020.
Knowledge about exercise intensity and energy expenditure combined with trip frequency and duration is necessary for interpreting the character and potential influencing capacity of habitual cycle commuting on e.g., health outcomes. It needs to be investigated with validated methods, which is the purpose of this study. Ten male and 10 female middle-aged habitual commuter cyclists were studied at rest and with maximal exercise tests on a cycle ergometer and a treadmill in the laboratory. During their normal commute in the Stockholm County, Sweden, their oxygen uptake, heart rate, energy expenditure, ventilation, blood lactate, rated perceived exertion, number of stops, durations, route distances and cycling velocities were monitored with validated methods. The frequency of trips was self-reported. The relative exercise intensity was 65% of maximal oxygen uptake, and the energy expenditure was 0.46 kcal per km and kg body weight for both sexes. Sex differences in MET-values (men, 8.7; women 7.4) mirrored higher levels of cycling speed (20%), body weight (29%), oxygen uptake (54%) and ventilation (51%) in men compared to women. The number of METhours per week during peak cycling season averaged 40 for the men and 28 for the women. It corresponded to a total energy expenditure of about 3,500 and 1,880 kcal for men and women, respectively. The number of trips per year was about 370, and the annual distance cycled was on average 3,500 km for men and 2,300 for women. Cycle commuting is characterized by equal relative aerobic intensity levels and energy requirements for a given distance cycled by men and women. Based on an overall evaluation, it represents a lower range within the vigorous intensity category. The combined levels of oxygen uptake, durations and trip frequencies lead to high levels of METhours and energy expenditure in both men and women during both peak cycling season as well as over the year. Overall, the study presents a novel basis for interpreting cycle commuting in relation to various health outcomes.
要解读习惯性自行车通勤对健康结果等方面的特征及潜在影响能力，就需要了解运动强度、能量消耗，以及出行频率和时长。这需要用经过验证的方法进行研究，而本研究的目的正在于此。在实验室中，对10名男性和10名女性中年习惯性通勤自行车骑行者进行了静息状态下以及在自行车测力计和跑步机上的最大运动测试。在瑞典斯德哥尔摩县他们正常通勤期间，用经过验证的方法监测了他们的摄氧量、心率、能量消耗、通气量、血乳酸、主观用力感觉等级、停车次数、时长、路线距离和骑行速度。出行频率由他们自己报告。相对运动强度为最大摄氧量的65%，男女两性每公里体重的能量消耗均为0.46千卡。代谢当量值的性别差异（男性为8.7；女性为7.4）反映出，与女性相比，男性的骑行速度高20%、体重高29%、摄氧量高54%、通气量高51%。在骑行旺季，男性每周的代谢当量小时数平均为40，女性为28。这分别相当于男性和女性的总能量消耗约为3500千卡和1880千卡。男性每年的出行次数约为370次，平均骑行距离为3500公里，女性为2300公里。男女在给定骑行距离下的自行车通勤具有相对有氧强度水平和能量需求相等的特点。基于总体评估，它属于高强度类别中的较低范围。摄氧量、时长和出行频率的综合水平导致男女在骑行旺季以及全年的代谢当量小时数和能量消耗都很高。总体而言，本研究为解读自行车通勤与各种健康结果的关系提供了一个新的依据。
