TY - JOUR
T1 - Environmental temperature and exercise-induced blood oxidative stress
AU - Quindry, John
AU - Miller, Lindsey
AU - McGinnis, Graham
AU - Kliszczewiscz, Brian
AU - Slivka, Dustin
AU - Dumke, Charles
AU - Cuddy, John
AU - Ruby, Brent
PY - 2013/4
Y1 - 2013/4
N2 - Previous research findings indicate that environmental temperature can influence exercise-induced oxidativestress responses, although the response to variable temperatures is unknown. The purpose of this study was to investigate the effect of warm, cold, and 'neutral,' or room, environmental temperatures on the blood oxidative stress associated with exercise and recovery. Participants (N = 12, age 27 ± 5 yr, VO2max = 56.7 ± 5.8 ml . kg-1 . min-1, maximal cycle power output = 300 ± 39 W) completed 3 exercise sessions consisting of a 1-hr ride at 60% Wmax, at 40% relative humidity in warm (33 °C), cold (7 °C), and room-temperature environments (20 °C) in a randomized crossover fashion. Rectal core temperature was monitored continually as participants remained in the respective trial temperature throughout a 3-hr recovery. Blood was collected preexercise and immediately, 1 hr, and 3 hr postexercise and analyzed for oxidative-stress markers including ferric-reducing ability of plasma (FRAP), Trolox-equivalent antioxidant capacity (TEAC), lipid hydroperoxides, and protein carbonyls. Core temperature was significantly elevated by all exercise trials, but recovery core temperatures reflected the given environment. FRAP (p < .001), TEAC (p < .001), and lipid hydroperoxides (p < .001) were elevated after warm exercise while protein carbonyls were not altered (p > .05). These findings indicate that moderate-intensity exercise and associated recovery in a warm environment elicits a blood oxidative-stress response not observed at comparable exercise performed at lower temperatures.
AB - Previous research findings indicate that environmental temperature can influence exercise-induced oxidativestress responses, although the response to variable temperatures is unknown. The purpose of this study was to investigate the effect of warm, cold, and 'neutral,' or room, environmental temperatures on the blood oxidative stress associated with exercise and recovery. Participants (N = 12, age 27 ± 5 yr, VO2max = 56.7 ± 5.8 ml . kg-1 . min-1, maximal cycle power output = 300 ± 39 W) completed 3 exercise sessions consisting of a 1-hr ride at 60% Wmax, at 40% relative humidity in warm (33 °C), cold (7 °C), and room-temperature environments (20 °C) in a randomized crossover fashion. Rectal core temperature was monitored continually as participants remained in the respective trial temperature throughout a 3-hr recovery. Blood was collected preexercise and immediately, 1 hr, and 3 hr postexercise and analyzed for oxidative-stress markers including ferric-reducing ability of plasma (FRAP), Trolox-equivalent antioxidant capacity (TEAC), lipid hydroperoxides, and protein carbonyls. Core temperature was significantly elevated by all exercise trials, but recovery core temperatures reflected the given environment. FRAP (p < .001), TEAC (p < .001), and lipid hydroperoxides (p < .001) were elevated after warm exercise while protein carbonyls were not altered (p > .05). These findings indicate that moderate-intensity exercise and associated recovery in a warm environment elicits a blood oxidative-stress response not observed at comparable exercise performed at lower temperatures.
KW - Antioxidant capacity
KW - Free radicals
KW - Protein carbonyls
KW - Reactive oxygen species
UR - http://www.scopus.com/inward/record.url?scp=84875449130&partnerID=8YFLogxK
U2 - 10.1123/ijsnem.23.2.128
DO - 10.1123/ijsnem.23.2.128
M3 - Article
AN - SCOPUS:84875449130
SN - 1526-484X
VL - 23
SP - 128
EP - 136
JO - International Journal of Sport Nutrition and Exercise Metabolism
JF - International Journal of Sport Nutrition and Exercise Metabolism
IS - 2
ER -