Reliability of laser Doppler, near-infrared spectroscopy and Doppler ultrasound for peripheral blood flow measurements during and after exercise in the heat

被引:15
作者
Choo, Hui C. [1 ]
Nosaka, Kazunori [1 ]
Peiffer, Jeremiah J. [2 ]
Ihsan, Mohammed [1 ,3 ]
Yeo, Chow C. [1 ]
Abbiss, Chris R. [1 ]
机构
[1] Edith Cowan Univ, Sch Med & Hlth Sci, Ctr Exercise & Sports Sci Res, Joondalup, WA, Australia
[2] Murdoch Univ, Sch Psychol & Exercise Sci, Murdoch, WA, Australia
[3] Singapore Sports Inst, Sports Physiol Dept, Singapore, Singapore
关键词
Coefficient of variation; cutaneous vascular conductance; reproducibility; muscle oxygenation; MUSCLE OXYGENATION; SKELETAL-MUSCLE; SKIN; ACCLIMATION; TEMPERATURE; INTENSITY; RESPONSES; VOLUME; REPRODUCIBILITY; STRESS;
D O I
10.1080/02640414.2016.1235790
中图分类号
G8 [体育];
学科分类号
04 ; 0403 ;
摘要
This study examined the test-retest reliability of near-infrared spectroscopy (NIRS), laser Doppler flowmetry (LDF) and Doppler ultrasound to assess exercise-induced haemodynamics. Nine men completed two identical trials consisting of 25-min submaximal cycling at first ventilatory threshold followed by repeated 30-s bouts of high-intensity (90% of peak power) cycling in 32.8 +/- 0.4 degrees C and 32 +/- 5% relative humidity (RH). NIRS (tissue oxygenation index [TOI] and total haemoglobin [tHb]) and LDF (perfusion units [PU]) signals were monitored continuously during exercise, and leg blood flow was assessed by Doppler ultrasound at baseline and after exercise. Cutaneous vascular conductance (CVC; PU/mean arterial pressure (MAP)) was expressed as the percentage change from baseline (% CVCBL). Coefficients of variation (CVs) as indicators of absolute reliability were 18.7-28.4%, 20.2-33.1%, 42.5-59.8%, 7.8-12.4% and 22.2-30.3% for PU, CVC, % CVCBL, TOI and tHb, respectively. CVs for these variables improved as exercise continued beyond 10 min. CVs for baseline and post-exercise leg blood flow were 17.8% and 10.5%, respectively. CVs for PU, tHb (r(2) = 0.062) and TOI (r(2) = 0.002) were not correlated (P > 0.05). Most variables demonstrated CVs lower than the expected changes (35%) induced by training or heat stress; however, minimum of 10 min exercise is recommended for more reliable measurements.
引用
收藏
页码:1715 / 1723
页数:9
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