title: Postexercise cold-water immersion improves intermittent high-intensity exercise performance in normothermia.
abstract: A brief cold water immersion between 2 continuous high-intensity exercise bouts improves the performance of the latter compared with passive recovery in the heat. We investigated if this effect is apparent in normothermic conditions (∼19 °C), employing an intermittent high-intensity exercise designed to reflect the work performed at the high-intensity domain in team sports. Fifteen young active men completed 2 exhaustive cycling protocols (Ex1 and Ex2: 12 min at 85% ventilatory threshold (VT) and then an intermittent exercise alternating 30-s at 40% peak power (Ppeak) and 30 s at 90% Ppeakto exhaustion) separated by 15 min of (i) passive rest, (ii) 5-min cold-water immersion at 8 °C, and (iii) 10-min cold-water immersion at 8 °C. Core temperature, heart rate, rates of perceived exertion, and oxygen uptake kinetics were not different during Ex1 among conditions. Time to failure during the intermittent exercise was significantly (P < 0.05) longer during Ex2 following the 5- and 10-min cold-water immersions (7.2 ± 3.5 min and 7.3 ± 3.3 min, respectively) compared with passive rest (5.8 ± 3.1 min). Core temperature, heart rate, and rates of perceived exertion were significantly (P < 0.05) lower during most periods of Ex2 after both cold-water immersions compared with passive rest. The time constant of phase II oxygen uptake response during the 85% VT bout of Ex2 was not different among the 3 conditions. A postexercise, 5- to 10-min cold-water immersion increases subsequent intermittent high-intensity exercise compared with passive rest in normothermia due, at least in part, to reductions in core temperature, circulatory strain, and effort perception.
authors: Department of Physiology, School of Medicine, Trinity College Dublin, University of Dublin, Ireland.|Department of Physiology, School of Medicine, Trinity College Dublin, University of Dublin, Ireland.
authors: Avina
authors: A
authors: McCarthy
authors: Department of Physiology, School of Medicine, Trinity College Dublin, University of Dublin, Ireland.|Department of Physiology, School of Medicine, Trinity College Dublin, University of Dublin, Ireland.
authors: James
authors: J
authors: Mulligan
authors: Department of Physiology, School of Medicine, Trinity College Dublin, University of Dublin, Ireland.|Department of Physiology, School of Medicine, Trinity College Dublin, University of Dublin, Ireland.
authors: Mikel
authors: M
authors: Egaña
mesh_terms: D000328:Adult; D054874:Athletic Performance; D001642:Bicycling; D001831:Body Temperature; D003080:Cold Temperature; D015444:Exercise; D017079:Exercise Tolerance; D005221:Fatigue / Q000517:prevention & control; D006339:Heart Rate; D000072696:High-Intensity Interval Training; D006801:Humans; D007101:Immersion; D008297:Male; D018482:Muscle, Skeletal / Q000502:physiology*; D010101:Oxygen Consumption; D005082:Physical Exertion; D012146:Rest; D013997:Time Factors; D055815:Young Adult
keywords: cold-water immersion; exercise recovery; half-time interval; hydrotherapy; hydrothérapie; immersion en eau froide; intervalle à mi-temps; récupération postexercice; sports d’équipe; team sports