Institute of Movement Sciences (ISM), University of the Mediterranean, Marseille, France.
Am J Phys Med Rehabil. 2012 Nov;91(11):931-40. doi: 10.1097/PHM.0b013e318269d9bb.
The aim of this study was to analyze the physiologic demand of pedaling on an electrically assisted bicycle to test its potential as an alternative method to perform exercise.
Twenty participants (ten trained vs. ten untrained in endurance) novice in the electrically assisted bicycle performed the same cycling protocol composed of nine 5-min submaximal cycling periods without electrical support (NO), with a light support (S1), or with a high support (S4). The cycling conditions were tested at two different imposed speeds (16 and 21 km·hr(-1)) and one freely chosen speed (mean [SD], 18.1 [0.7] km·h(-1)).
Mean power output, intensity, and energy expenditure were significantly lowered by the use of an electrical support, in similar proportions between the groups. For all subjects, the intensity of the electrically assisted bicycle in all measured conditions (S1 or S4) was sufficiently high to achieve the standards for moderate-intensity health-enhancing physical activity for adults (>3 metabolic equivalents). However, a vigorous intensity (>6 metabolic equivalents) was reached with the NO and S1 supports in the untrained group whatever the cycling speed and only at 21 km·hr(-1) with the light support (S1) in the endurance-trained group.
By reducing the perceived sensation of effort while maintaining a sufficiently high energy expenditure, the electrically assisted bicycle has a great potential to promote physical activity in industrialized societies.
本研究旨在分析电动助力自行车踩踏的生理需求，以测试其作为替代运动方法的潜力。
20 名参与者（10 名有耐力训练的参与者和 10 名无耐力训练的参与者）均为电动助力自行车新手，他们完成了相同的九次 5 分钟亚最大强度踏车周期，没有电动助力（NO）、轻度助力（S1）或高度助力（S4）。测试条件在两种不同的强制速度（16 和 21km·hr(-1))和一种自由选择的速度（平均[SD]，18.1[0.7]km·h(-1))下进行。
电动助力的使用显著降低了平均功率输出、强度和能量消耗，在两组之间的比例相似。对于所有受试者，在所有测量条件下（S1 或 S4），电动助力自行车的强度都足够高，达到了促进成年人（>3 代谢当量）健康增强身体活动的中等强度标准。然而，无论踏车速度如何，未受过耐力训练的组在无助力（NO）和轻度助力（S1）条件下均可达到剧烈强度（>6 代谢当量），而在有耐力训练的组仅在 21km·hr(-1)的轻度助力（S1）条件下才可达到。
电动助力自行车通过降低感知的努力程度，同时保持足够高的能量消耗，具有很大的潜力来促进工业化社会的身体活动。
