マイクロメカトロニクス
Online ISSN : 2432-0358
Print ISSN : 1343-8565
ISSN-L : 1343-8565
研究
ウエアラブル機器へ適用するための最大酸素摂取量推定方法の検討
笹原 英生崔 宇飛黒田 真朗前澤 秀和永富 良一
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ジャーナル フリー

2020 年 64 巻 223 号 p. 1-15

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抄録

  Indicators of training effects in endurance race include VO2max. Measurement of VO2max is not easy because it requires a research facility. Therefore, simple estimation methods have been investigated. They include the Åstrand and Ryhming nomogram, which allows the estimation of VO2max from heart rates and VO2 during submaximal exercise. However, since it was developed for those in 20s, it lacks accuracy in estimating VO2max in 30s or older with lower maximum heart rates. In recent years, wearable wristwatch-type equipment with sensors, such as GPS, have been widely used, facilitating the measurements of heart rates and running speeds during exercise. Therefore, if VO2max can be estimated from running speed, it can be conveniently measured simply by wearing wearable equipment and using the Åstrand and Ryhming nomogram. In addition, the above issue relevant to the Åstrand and Ryhming nomogram can be solved by taking the maximum heart rates of individuals into consideration, allowing the estimation of VO2max close to the actual measurement. Therefore, we aim to examine whether VO2max can be estimated from heart rates and running speeds during running using the Åstrand and Ryhming nomogram by taking the maximum heart rates of individuals into consideration. Thirty-five healthy men (age: 36.7 ± 12.7, height: 170.0 ± 5.1 cm, body weight: 65.8 ± 7.3 kg) and twenty-eight healthy women (age: 37.4 ± 11.8, height: 158.8 ± 5.3 cm, body weight: 51.3 ± 5.3 kg) were included. For each subject, running speeds and heart rates were measured using low-, medium-, and high-intensity constant load tests after measurement of VO2max and maximum heart rates by an incremental load test. VO2 was estimated from the running speeds using the ACSM running equation. VO2max was estimated using the formulated VO2max estimation nomogram of Åstrand et al., and compared with the VO2max measured in the incremental load test, demonstrating a significant correlation between the measured and estimated VO2max in both males (r = 0.81) and females (r = 0.75) (p < 0.01). In conclusion, the novel Åstrand and Ryhming nomogram is applicable to wearable equipment by taking the maximum heart rates of individuals into consideration and using running speeds and heart rates during running.

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© 2020 一般社団法人 日本時計学会
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