Intensities and Metabolic Characteristics of the Walking and Running during Snowfall Season

虽然从无雪表面运行速度估算VO2/能量消耗的信息很多，但关于降雪季节VO_2/能量消耗关系的报道很少。通过对非降雪期和降雪期步行和跑步的运动强度和步态特征的测定，揭示了降雪期步行和跑步的特点。结果如下：(1)10名健康老年男性受试者在雪地上行走时的VO2比非降雪季节以相同速度行走时的VO2高3~4ml/kg/min(1 Met)，(2)在雪地上以相同速度行走时的心率平均值比在无雪地面上行走时高6~8次/min，VO2比在无雪地面上跑步时高2~3ml/kg/min。与无雪表面或无雪表面相比，在无雪表面跑步时，受试者各受试者的血乳酸浓度升高的速度较慢。(3)与无雪表面或无雪表面相比，在无雪表面跑步时运动强度有增加的趋势，步长有减小的趋势。运动强度和步态特征在很大程度上受地表积雪性质的影响。

Although much informations were presented for the estimation of VO_2/energy expenditure from running velocity on snowless surface, few information are reported regarding to the relationships during snowfall season. Exercise intensities and the gait characteristics of walking and running were determined during non-snowfall season and snowfall season for the purpose to elucidate the characteristics of walking/running during snowfall season. The results were summalized as follows :(1) VO_2 in ten healthy elderly male subjects during walking on packed snow were 3 to 4 ml/kg/min (1 Met) higher than these during walking at the same velocity on non-snowfall season.(2) Mean values in the heart rate during running on packed snow at the same velocity were 6 to 8 beats/min higher, and VO_2 were 2 to 3 ml/kg/min higher than these during running on snowless surface. Blood lactate concentration in each subject during running on packed snow increased at lower velocity than these on snowless surface.(3) There were tendencies of increasing exercise intensities and decreasing stride length during running on slushy snow comparing with snowless surface or packed snow. These difference were enlarged as the velocity increase.It was concluded that exercise intensities and gait characteristics were largely influenced by nature of snow on surface.