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首页> 外文期刊>Brazilian Journal of Medical and Biological Research >Reliability and validity of heart rate variability threshold assessment during an incremental shuttle-walk test in middle-aged and older adults
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Reliability and validity of heart rate variability threshold assessment during an incremental shuttle-walk test in middle-aged and older adults

机译：在中老年人中进行递增穿梭步行试验期间心率变异性阈值评估的信度和效度

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Studies on the assessment of heart rate variability threshold (HRVT) during walking are scarce. We determined the reliability and validity of HRVT assessment during the incremental shuttle walk test (ISWT) in healthy subjects. Thirty-one participants aged 57 ± 9 years (17 females) performed 3 ISWTs. During the 1st and 2nd ISWTs, instantaneous heart rate variability was calculated every 30?s and HRVT was measured. Walking velocity at HRVT in these tests (WV-HRVT1 and WV-HRVT2) was registered. During the 3rd ISWT, physiological responses were assessed. The ventilatory equivalents were used to determine ventilatory threshold (VT) and the WV at VT (WV-VT) was recorded. The difference between WV-HRVT1 and WV-HRVT2 was not statistically significant (median and interquartile range = 4.8; 4.8 to 5.4 vs 4.8; 4.2 to 5.4?km/h); the correlation between WV-HRVT1 and WV-HRVT2 was significant (r = 0.84); the intraclass correlation coefficient was high (0.92; 0.82 to 0.96), and the agreement was acceptable (-0.08?km/h; -0.92 to 0.87). The difference between WV-VT and WV-HRVT2 was not statistically significant (4.8; 4.8 to 5.4 vs 4.8; 4.2 to 5.4?km/h) and the agreement was acceptable (0.04?km/h; -1.28 to 1.36). HRVT assessment during walking is a reliable measure and permits the estimation of VT in adults. We suggest the use of the ISWT for the assessment of exercise capacity in middle-aged and older adults.
机译：步行期间对心率变异性阈值（HRVT）评估的研究很少。我们确定了健康受试者的增量穿梭行走测试（ISWT）期间HRVT评估的可靠性和有效性。年龄为57±9岁的31名参与者（17名女性）进行了3次ISWT。在第一和第二次ISWT期间，每30？s计算一次瞬时心率变异性，并测量HRVT。在这些测试（WV-HRVT1和WV-HRVT2）中记录了HRVT的步行速度。在第三次ISWT期间，评估了生理反应。使用通气等效值确定通气阈值（VT），并记录VT处的WV（WV-VT）。 WV-HRVT1和WV-HRVT2之间的差异无统计学意义（中位数和四分位数间距= 4.8; 4.8至5.4与4.8; 4.2至5.4？km / h）; WV-HRVT1和WV-HRVT2之间的相关性显着（r = 0.84）;组内相关系数很高（0.92; 0.82至0.96），并且一致性可以接受（-0.08？km / h; -0.92至0.87）。 WV-VT和WV-HRVT2之间的差异在统计学上不显着（4.8; 4.8至5.4与4.8; 4.2至5.4？km / h），一致性是可以接受的（0.04？km / h; -1.28至1.36）。步行过程中的HRVT评估是一种可靠的措施，可以估算成人的VT。我们建议使用ISWT来评估中老年人的运动能力。

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