No effect of glutamine supplementation and hyperoxia on oxidative metabolism and performance during high-intensity exercise

2008 ◽  
Vol 26 (10) ◽  
pp. 1081-1090 ◽  
Author(s):  
Simon Marwood ◽  
Jo Bowtell
Keyword(s):  
Oxidative Metabolism ◽  
High Intensity ◽  
High Intensity Exercise ◽  
Glutamine Supplementation ◽  
And Performance

Effects of Lactate Consumption on Blood Bicarbonate Levels and Performance During High-Intensity Exercise

2011 ◽  
Vol 21 (4) ◽  
pp. 311-317 ◽  
Author(s):  
David M. Morris ◽  
Rebecca S. Shafer ◽  
Kimberly R. Fairbrother ◽  
Mark W. Woodall
Keyword(s):  
Body Mass ◽  
High Intensity ◽  
Performance Test ◽  
Cycle Ergometer ◽  
High Intensity Exercise ◽  
Time To Exhaustion ◽  
Total Work ◽  
Male And Female ◽  
Lactate Consumption ◽  
And Performance

The authors sought to determine the effects of oral lactate consumption on blood bicarbonate (HCO3−) levels, pH levels, and performance during high-intensity exercise on a cycle ergometer. Subjects (N = 11) were trained male and female cyclists. Time to exhaustion (TTE) and total work were measured during high-intensity exercise bouts 80 min after the consumption of 120 mg/kg body mass of lactate (L), an equal volume of placebo (PL), or no treatment (NT). Blood HCO3− increased significantly after ingestion of lactate (p < .05) but was not affected in PL or NT (p > .05). No changes in pH were observed as a result of treatment. TTE and total work during the performance test increased significantly by 17% in L compared with PL and NT (p = .02). No significant differences in TTE and total work were seen between the PL and NT protocols (p = .85). The authors conclude that consuming 120 mg/kg body mass of lactate increases HCO3− levels and increases exercise performance during high-intensity cycling ergometry to exhaustion.

Short-Duration, High-Intensity Exercise and Performance of a Sports-Specific Skill: A Preliminary Study

2007 ◽  
Vol 105 (2) ◽  
pp. 523-530 ◽  
Author(s):  
Terry McMorris ◽  
Tom Rayment
Keyword(s):  
Short Duration ◽  
High Intensity ◽  
High Intensity Exercise ◽  
Perceptual Judgment ◽  
Negative Effect ◽  
Specific Skill ◽  
Preliminary Study ◽  
And Performance ◽  
Variable Errors ◽  
Number Of Passes

The purpose of this study was to examine the effect of one bout and three intermittent bouts of short-duration, high-intensity running on the performance of a sports-specific psychomotor skill. Participants ( N = 13) were male soccer players ( M age 20.5 yr., SD = 2.0) who had been playing semi-professionally for M = 2.1 years, SD = 1.11 and trained twice a week. They undertook a soccer-passing test in three conditions: following rest, following a 100-m sprint and following 3 × 100-m sprints, with 30-sec. rest intervals between sprints. Passing accuracy showed a significant linear deterioration, while number of passes showed a significant quadratic effect. Low to moderate linear regression correlations were found between posttest heart rate and absolute and variable errors on the test. It was concluded that short-duration, high-intensity exercise has a negative effect on accuracy in a sports-specific task that requires both perceptual judgment and motor control.

scholarly journals Sprint Training Increases Muscle Oxidative Metabolism During High-Intensity Exercise in Patients With Type 1 Diabetes

Diabetes Care ◽  
2008 ◽  
Vol 31 (11) ◽  
pp. 2097-2102 ◽  
Author(s):  
A. R. Harmer ◽  
D. J. Chisholm ◽  
M. J. McKenna ◽  
S. K. Hunter ◽  
P. A. Ruell ◽  
...  
Keyword(s):  
Type 1 Diabetes ◽  
Oxidative Metabolism ◽  
High Intensity ◽  
High Intensity Exercise ◽  
Sprint Training

scholarly journals Prior Low- or High-Intensity Exercise Alters Pacing Strategy, Energy System Contribution and Performance during a 4-km Cycling Time Trial

PLoS ONE ◽  
2014 ◽  
Vol 9 (10) ◽  
pp. e110320 ◽  
Author(s):  
Carlos Rafaell Correia-Oliveira ◽  
Ralmony Alcantara Santos ◽  
Marcos David Silva-Cavalcante ◽  
Romulo Bertuzzi ◽  
Maria Augusta Peduti Dal’Molin Kiss ◽  
...  
Keyword(s):  
High Intensity ◽  
Time Trial ◽  
Energy System ◽  
High Intensity Exercise ◽  
Cycling Time Trial ◽  
Pacing Strategy ◽  
And Performance ◽  
Cycling Time
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