Metabolic response of trained and untrained women during high-intensity intermittent cycle exercise

2007 ◽  
Vol 293 (6) ◽  
pp. R2370-R2375 ◽  
Author(s):  
E. Gail Trapp ◽  
Donald J. Chisholm ◽  
Stephen H. Boutcher
Keyword(s):  
Oxygen Uptake ◽  
Young Women ◽  
High Intensity ◽  
Metabolic Response ◽  
Intermittent Exercise ◽  
High Intensity Exercise ◽  
Cycle Exercise ◽  
Trained Subjects ◽  
Women Subjects ◽  
Catecholamine Concentration

The metabolic response to two different forms of high-intensity intermittent cycle exercise was investigated in young women. Subjects (8 trained and 8 untrained) performed two bouts of high-intensity intermittent exercise: short sprint (SS) (8-s sprint, 12-s recovery) and long sprint (LS) (24-s sprint, 36-s recovery) for 20 min on two separate occasions. Both workload and oxygen uptake were greater in the trained subjects but were not significantly different for SS and LS. Plasma glycerol concentrations significantly increased during exercise. Lactate concentrations rose over the 20 min and were higher for the trained women. Catecholamine concentration was also higher postexercise compared with preexercise for both groups. Both SS and LS produced similar metabolic response although both lactate and catecholamines were higher after the 24-s sprint. In conclusion, these results show that high-intensity intermittent exercise resulted in significant elevations in catecholamines that appear to be related to increased venous glycerol concentrations. The trained compared with the untrained women tended to show an earlier increase in plasma glycerol concentrations during high-intensity exercise.

scholarly journals Postexercise cold-water immersion improves intermittent high-intensity exercise performance in normothermia

2016 ◽  
Vol 41 (11) ◽  
pp. 1163-1170 ◽  
Author(s):  
Avina McCarthy ◽  
James Mulligan ◽  
Mikel Egaña
Keyword(s):  
Heart Rate ◽  
Oxygen Uptake ◽  
Core Temperature ◽  
High Intensity ◽  
Perceived Exertion ◽  
Cold Water ◽  
Intermittent Exercise ◽  
Water Immersion ◽  
Cold Water Immersion ◽  
High Intensity Exercise

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% Ppeak to 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.

scholarly journals Locomotor Muscle Fatigue Does Not Alter Oxygen Uptake Kinetics during High-Intensity Exercise

2016 ◽  
Vol 7 ◽  
Author(s):  
James G. Hopker ◽  
Giuseppe Caporaso ◽  
Andrea Azzalin ◽  
Roger Carpenter ◽  
Samuele M. Marcora
Keyword(s):  
Oxygen Uptake ◽  
Muscle Fatigue ◽  
High Intensity ◽  
Oxygen Uptake Kinetics ◽  
Uptake Kinetics ◽  
High Intensity Exercise

scholarly journals Muscle metabolic responses during high-intensity intermittent exercise measured by 31P-MRS: relationship to the critical power concept

2013 ◽  
Vol 305 (9) ◽  
pp. R1085-R1092 ◽  
Author(s):  
Weerapong Chidnok ◽  
Fred J. DiMenna ◽  
Jonathan Fulford ◽  
Stephen J. Bailey ◽  
Philip F. Skiba ◽  
...  
Keyword(s):  
High Intensity ◽  
Critical Power ◽  
Intermittent Exercise ◽  
High Intensity Exercise ◽  
Interval Duration ◽  
Constant Power ◽  
Recovery Interval ◽  
Duration Relationship ◽  
Recovery Protocols ◽  
Work Done

We investigated the responses of intramuscular phosphate-linked metabolites and pH (as assessed by 31P-MRS) during intermittent high-intensity exercise protocols performed with different recovery-interval durations. Following estimation of the parameters of the power-duration relationship, i.e., the critical power ( CP) and curvature constant ( W′), for severe-intensity constant-power exercise, nine male subjects completed three intermittent exercise protocols to exhaustion where periods of high-intensity constant-power exercise (60 s) were separated by different durations of passive recovery (18 s, 30 s and 48 s). The tolerable duration of exercise was 304 ± 68 s, 516 ± 142 s, and 847 ± 240 s for the 18-s, 30-s, and 48-s recovery protocols, respectively ( P < 0.05). The work done > CP ( W> CP) was significantly greater for all intermittent protocols compared with the subjects' W′, and this difference became progressively greater as recovery-interval duration was increased. The restoration of intramuscular phosphocreatine concentration during recovery was greatest, intermediate, and least for 48 s, 30 s, and 18 s of recovery, respectively ( P < 0.05). The W> CP in excess of W′ increased with greater durations of recovery, and this was correlated with the mean magnitude of muscle phosphocreatine reconstitution between work intervals ( r = 0.61; P < 0.01). The results of this study show that during intermittent high-intensity exercise, recovery intervals allow intramuscular homeostasis to be restored, with the degree of restoration being related to the duration of the recovery interval. Consequently, and consistent with the intermittent CP model, the ability to perform W> CP during intermittent high-intensity exercise and, therefore, exercise tolerance, increases when recovery-interval duration is extended.

Oxygen Uptake Response To High Intensity Intermitten Cycle Exercise

2004 ◽  
Vol 36 (Supplement) ◽  
pp. S278
Author(s):  
Gail Trapp ◽  
Yati N. Boutcher ◽  
Stephen H. Boutcher
Keyword(s):  
Oxygen Uptake ◽  
High Intensity ◽  
Cycle Exercise ◽  
Oxygen Uptake Response

Oxygen Uptake Response To High Intensity Intermitten Cycle Exercise

2004 ◽  
Vol 36 (Supplement) ◽  
pp. S278 ◽  
Author(s):  
Gail Trapp ◽  
Yati N. Boutcher ◽  
Stephen H. Boutcher
Keyword(s):  
Oxygen Uptake ◽  
High Intensity ◽  
Cycle Exercise ◽  
Oxygen Uptake Response

scholarly journals Moderate-intensity exercise with blood flow restriction on cardiopulmonary kinetics and efficiency during a subsequent high-intensity exercise in young women

Medicine ◽  
2021 ◽  
Vol 100 (31) ◽  
pp. e25368
Author(s):  
Robson F. Borges ◽  
Gaspar R. Chiappa ◽  
Paulo T. Muller ◽  
Alexandra Correa Gervazoni Balbuena de Lima ◽  
Lawrence Patrick Cahalin ◽  
...  
Keyword(s):  
Blood Flow ◽  
Young Women ◽  
High Intensity ◽  
High Intensity Exercise ◽  
Blood Flow Restriction ◽  
Moderate Intensity ◽  
Moderate Intensity Exercise ◽  
Flow Restriction

Acute effects of chocolate milk and a commercial recovery beverage on postexercise recovery indices and endurance cycling performance

2009 ◽  
Vol 34 (6) ◽  
pp. 1017-1022 ◽  
Author(s):  
Kelly Pritchett ◽  
Philip Bishop ◽  
Robert Pritchett ◽  
Matt Green ◽  
Charlie Katica
Keyword(s):  
Oxygen Uptake ◽  
Maximal Oxygen Uptake ◽  
High Intensity ◽  
Repeated Measures ◽  
Intermittent Exercise ◽  
Cycling Performance ◽  
Exercise Session ◽  
Time To Exhaustion ◽  
Chocolate Milk ◽  
Significant Difference

To maximize training quality, athletes have sought nutritional supplements that optimize recovery. This study compared chocolate milk (CHOC) with a carbohydrate replacement beverage (CRB) as a recovery aid after intense exercise, regarding performance and muscle damage markers in trained cyclists. Ten regional-level cyclists and triathletes (maximal oxygen uptake 55.2 ± 7.2 mL·kg–1·min–1) completed a high-intensity intermittent exercise protocol, then 15–18 h later performed a performance trial at 85% of maximal oxygen uptake to exhaustion. Participants consumed 1.0 g carbohydrate·kg–1·h–1 of a randomly assigned isocaloric beverage (CHOC or CRB) after the first high-intensity intermittent exercise session. The same protocol was repeated 1 week later with the other beverage. A 1-way repeated measures analysis of variance revealed no significant difference (p = 0.91) between trials for time to exhaustion at 85% of maximal oxygen uptake (CHOC 13 ± 10.2 min, CRB 13.5 ± 8.9 min). The change in creatine kinase (CK) was significantly (p < 0.05) greater in the CRB trial than in the CHOC trial (increase CHOC 27.9 ± 134.8 U·L–1, CRB 211.9 ± 192.5 U·L–1), with differences not significant for CK levels before the second exercise session (CHOC 394.8 ± 166.1 U·L–1, CRB 489.1 ± 264.4 U·L–1) between the 2 trials. These findings indicate no difference between CHOC and this commercial beverage as potential recovery aids for cyclists between intense workouts.

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