Smith Ashleigh E, Eston Roger G, Norton Belinda, Parfitt Gaynor
Exercise for Health and Human Performance, Sansom Institute for Health Research, School of Health Sciences, The University of South Australia, Adelaide, Australia.
J Aging Phys Act. 2015 Apr;23(2):205-11. doi: 10.1123/japa.2013-0213. Epub 2014 Apr 3.
Peak oxygen uptake (VO2peak) is reliably predicted in young and middle-aged adults using a submaximal perceptually-regulated exercise test (PRET). It is unknown whether older adults can use a PRET to accurately predict VO2peak. In this study, the validity of a treadmill-based PRET to predict VO2peak was assessed in 24 participants (65.2 ± 3.9 years, 11 males). The PRET required a change in speed or incline corresponding to ratings of perceived exertion (RPE) 9, 11, 13, and 15. Extrapolation of submaximal VO2 from the PRET to RPE endpoints 19 and 20 and age-predicted HRmax were compared with measured VO2peak. The VO2 extrapolated to both RPE19 and 20 over-predicted VO2peak (p < .001). However, extrapolating VO2 to age-predicted HRmax accurately predicted VO2peak (r = .84). Results indicate older adults can use a PRET to predict VO2peak by extrapolating VO2 from submaximal intensities to an age-predicted HRmax.
使用次极量感知调节运动试验（PRET）能够可靠地预测年轻和中年成年人的峰值摄氧量（VO2peak）。目前尚不清楚老年人是否可以使用PRET来准确预测VO2peak。在本研究中，对24名参与者（65.2±3.9岁，11名男性）进行了基于跑步机的PRET预测VO2peak的有效性评估。PRET要求根据感知运动用力程度（RPE）9、11、13和15改变速度或坡度。将PRET的次极量VO2外推至RPE终点19和20以及年龄预测的HRmax，并与测量的VO2peak进行比较。外推至RPE19和20的VO2均高估了VO2peak（p<.001）。然而，将VO2外推至年龄预测的HRmax可准确预测VO2peak（r=.84）。结果表明，老年人可以通过将次极量强度下的VO2外推至年龄预测的HRmax，使用PRET来预测VO2peak。
