ORCID Profile
0000-0002-4631-6751
Current Organisation
Edith Cowan University
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Publisher: Springer Science and Business Media LLC
Date: 30-03-2020
Publisher: Public Library of Science (PLoS)
Date: 27-02-2019
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 10-2014
Publisher: Informa UK Limited
Date: 21-09-2016
DOI: 10.1080/02640414.2016.1235790
Abstract: 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°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 (%CVC
Publisher: Informa UK Limited
Date: 02-12-2022
Publisher: Springer Science and Business Media LLC
Date: 31-05-2023
Publisher: Wiley
Date: 28-07-2016
DOI: 10.1111/CPF.12380
Abstract: This study compared the effect of postexercise water immersion (WI) at different temperatures on common femoral artery blood flow (CFA), muscle (total haemoglobin tHb) and skin perfusion (cutaneous vascular conductance CVC), assessed by Doppler ultrasound, near-infrared spectroscopy (NIRS) and laser Doppler flowmetry, respectively. Given that heat stress may influence the vascular response during cooling, nine men cycled for 25 min at the first ventilatory threshold followed by intermittent 30-s cycling at 90% peak power until exhaustion at 32·8 ± 0·4°C and 32 ± 5% RH. They then received 5-min WI at 8·6 ± 0·2°C (WI
Publisher: American Physiological Society
Date: 08-2015
DOI: 10.1152/AJPREGU.00031.2015
Abstract: This study investigated the effect of regular postexercise cold water immersion (CWI) on muscle aerobic adaptations to endurance training. Eight males performed 3 sessions/wk of endurance training for 4 wk. Following each session, subjects immersed one leg in a cold water bath (10°C COLD) for 15 min, while the contralateral leg served as a control (CON). Muscle biopsies were obtained from vastus lateralis of both CON and COLD legs prior to training and 48 h following the last training session. S les were analyzed for signaling kinases: p38 MAPK and AMPK, peroxisome proliferator-activated receptor gamma coactivator-1α (PGC-1α), enzyme activities indicative of mitochondrial biogenesis, and protein subunits representative of respiratory chain complexes I–V. Following training, subjects' peak oxygen uptake and running velocity were improved by 5.9% and 6.2%, respectively ( P 0.05). Repeated CWI resulted in higher total AMPK, phosphorylated AMPK, phosphorylated acetyl-CoA carboxylase, β-3-hydroxyacyl-CoA-dehydrogenase and the protein subunits representative of complex I and III ( P 0.05). Moreover, large effect sizes (Cohen's d 0.8) were noted with changes in protein content of p38 ( d = 1.02, P = 0.064), PGC-1α ( d = 0.99, P = 0.079), and peroxisome proliferator-activated receptor α ( d = 0.93, P = 0.10) in COLD compared with CON. No differences between conditions were observed in the representative protein subunits of respiratory complexes II, IV, and V and in the activities of several mitochondrial enzymes ( P 0.05). These findings indicate that regular CWI enhances p38, AMPK, and possibly mitochondrial biogenesis.
No related grants have been discovered for Hui Cheng Choo.