Department of Physiology, National Medical College, Bhediyahi-18, P.O. Box 78, Parsa, Birgunj, Nepal.
J Environ Public Health. 2011;2011:232168. doi: 10.1155/2011/232168. Epub 2011 Sep 25.
Miners fitness test was assessed in terms of determination of maximum aerobic capacity by an indirect method following a standard step test protocol before going down to mine by taking into consideration of heart rates (Telemetric recording) and oxygen consumption of the subjects (Oxylog-II) during exercise at different working rates. Maximal heart rate was derived as 220-age. Coal miners reported a maximum aerobic capacity within a range of 35-38.3 mL/kg/min. It also revealed that oldest miners (50-59 yrs) had a lowest maximal oxygen uptake (34.2 ± 3.38 mL/kg/min) compared to (42.4 ± 2.03 mL/kg/min) compared to (42.4 ± 2.03 mL/kg/min) the youngest group (20-29 yrs). It was found to be negatively correlated with age (r = -0.55 and -0.33 for younger and older groups respectively) and directly associated with the body weight of the subjects (r = 0.57 - 0.68, P ≤ 0.001). Carriers showed maximum cardio respiratory capacity compared to other miners. Indian miners VO(2 max) was found to be lower both compared to their abroad mining counterparts and various other non-mining occupational working groups in India.
矿工体能测试是通过标准台阶测试方案，在矿工下矿前，根据心率（遥测记录）和运动期间受试者的耗氧量（Oxylog-II）来间接测定最大有氧能力。最大心率为 220 减去年龄。矿工的最大有氧能力报告值在 35-38.3 毫升/公斤/分钟范围内。研究还表明，最年长的矿工（50-59 岁）的最大耗氧量最低（34.2 ± 3.38 毫升/公斤/分钟），与最年轻的矿工（20-29 岁）相比（42.4 ± 2.03 毫升/公斤/分钟）。最大有氧能力与年龄呈负相关（年轻组 r = -0.55，年长组 r = -0.33），与受试者的体重呈直接相关（r = 0.57-0.68，P ≤ 0.001）。与其他矿工相比，携带氧气的矿工表现出更高的心肺呼吸能力。与国外采矿同行以及印度其他非采矿职业工作群体相比，印度矿工的最大摄氧量（VO2 max）较低。
