身体的虚弱が疑われる低体力と運動量の関係：地域在住高齢女性を対象とした横断研究

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  • Cross-sectional analysis of low fitness status as an indicator of physical frailty and quantity of exercise in community-dwelling older women
  • シンタイテキ キョジャク ガ ウタガワレル テイタイリョク ト ウンドウリョウ ノ カンケイ : チイキ ザイジュウ コウレイ ジョセイ オ タイショウ ト シタ オウダン ケンキュウ

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PURPOSE: The purpose of this study was to examine the association between low fitness status and quantity of exercise, and to derive a reference value of exercise for preventing low fitness status, in community-dwelling older women.<br> METHODS: The participants were 515 community-dwelling older women, aged 65 to 91 years (73.4±5.5 years). Physical fitness was assessed using a functional fitness score (FFS), which was calculated from the scores of four fitness items (i.e., tandem stance, 5-chair sit-to-stand, alternate step, and up & go). The quantity of exercise (QE) was calculated by multiplying exercise duration, exercise frequency and exercise intensity per week. The participants were divided into four groups according to the level of QE (no exercise: NE Group (QE=0), Low Tertile Group (0<QE≦4.6), Middle Tertile Group (4.6<QE≦11.7), High Tertile Group (QE>11.7)). FFSs of less than 0.065 were defined as the low fitness, and those of 0.065 or more were defined as good fitness. Logistic regression analysis was performed to obtain odds ratios (ORs) and 95% confidence interval (CI) for the low fitness according to the level of QE. Receiver operating characteristic (ROC) analysis was conducted to detect a reference value of QE. RESULTS: The ORs (95% CI) compared with the NE Group were 0.76 (0.44-1.32) in the Low Group, 0.53 (0.31-0.92) in the Middle Group, and 0.30 (0.17-0.55) in the High Group. The optimal QE cut-off value for the low fitness was 5.1 METs·hour/week (area under the ROC curve: 0.64, sensitivity: 55%, specificity: 68%).<br> CONCLUSION: It is recommended that community-dwelling older women exceed at least 5.1 METs·hour/week on a regular basis to prevent the low fitness status. Longitudinal research on the quantity of exercise, assessed using an accelerometer, is needed to obtain a more accurate reference value.<br>

収録刊行物

  • 体育学研究

    体育学研究 57 (1), 9-19, 2012

    一般社団法人 日本体育・スポーツ・健康学会

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