Dose-response relationship of taurine on endurance cycling performance under hot and humid conditions
Year: 2025
Type: article
Study designs: Randomized Controlled Trial, Clinical Trial
Abstract: Purpose To investigate the effects of different doses of taurine on endurance exercise performance and physiological parameters under hot and humid conditions. Methods This study adopted a double-blind, randomized, placebo-controlled, cross-over design. Sixteen male university students majoring in physical education (age: 20.12 ± 1.12 years; training status: ≥3 endurance sessions/week) received 4 supplement conditions: (1) placebo (maltodextrin), (2) low-dose (1 g taurine), (3) medium-dose (4 g taurine), and (4) high-dose (6 g taurine). Participants performed a graded cycling test (initial 50 W, +50 W every 3 min at 70 rpm) until exhaustion in an environmental chamber (35 °C, 65% RH). Heart rate, core temperature, skin temperature, sweat rate, RPE, and thermal sensation were measured. Results Compared to placebo, time to exhaustion was significantly longer in the medium-dose group (p < 0.05), with no significant or trend-level effects in low- or high-dose groups. Blood lactate accumulation and sweating rate were higher in the medium-dose group (p < 0.05). Core temperature (9 min-End) was lower in the medium-dose group during the latter exercise phase (p < 0.05). Conclusion Under hot and humid conditions, acute 4 g taurine supplementation enhanced time to exhaustion during graded cycling by improving thermoregulatory responses, whereas 1 g and 6 g doses showed no ergogenic effects.
Source: Frontiers in Nutrition
Authors: Xinlei Li, Lei Huo, Linuo Wang, Wenjuan Zhang
Language: English
Subfield: Physiology
Field: Medicine
Domain: Health Sciences
Open Access status: gold
Estimated APC paid: $3,801
OpenAlex ID: W4415097014