scholarly journals The Effects of Different Warm-up Loads [Routines] at Equal Total Workload for High Intensity Exercise Performance

2006 ◽  
Vol 4 ◽  
pp. 1-9 ◽  
Author(s):  
Kazuki Takizawa ◽  
Kojiro Ishii
Keyword(s):  
Exercise Performance ◽  
High Intensity ◽  
High Intensity Exercise ◽  
Warm Up ◽  
Total Workload

scholarly journals Effects of Respiratory Muscle Warm-up on High-Intensity Exercise Performance

Sports ◽  
2015 ◽  
Vol 3 (4) ◽  
pp. 312-324
Author(s):  
Taylor Thurston ◽  
Jared Coburn ◽  
Lee Brown ◽  
Albert Bartolini ◽  
Tori Beaudette ◽  
...  
Keyword(s):  
Exercise Performance ◽  
High Intensity ◽  
Respiratory Muscle ◽  
High Intensity Exercise ◽  
Warm Up

scholarly journals Defining the contribution of skeletal muscle pyruvate dehydrogenase α1 to exercise performance and insulin action

2018 ◽  
Vol 315 (5) ◽  
pp. E1034-E1045 ◽  
Author(s):  
Kristoffer Svensson ◽  
Jessica R. Dent ◽  
Shahriar Tahvilian ◽  
Vitor F. Martins ◽  
Abha Sathe ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Insulin Sensitivity ◽  
Energy Expenditure ◽  
Exercise Performance ◽  
Pyruvate Dehydrogenase ◽  
High Intensity ◽  
High Intensity Exercise ◽  
Low Intensity ◽  
Low Intensity Exercise ◽  
Muscle Contractile

The pyruvate dehydrogenase complex (PDC) converts pyruvate to acetyl-CoA and is an important control point for carbohydrate (CHO) oxidation. However, the importance of the PDC and CHO oxidation to muscle metabolism and exercise performance, particularly during prolonged or high-intensity exercise, has not been fully defined especially in mature skeletal muscle. To this end, we determined whether skeletal muscle-specific loss of pyruvate dehydrogenase alpha 1 ( Pdha1), which is a critical subunit of the PDC, impacts resting energy metabolism, exercise performance, or metabolic adaptation to high-fat diet (HFD) feeding. For this, we generated a tamoxifen (TMX)-inducible Pdha1 knockout (PDHmKO) mouse, in which PDC activity is temporally and specifically ablated in adult skeletal muscle. We assessed energy expenditure, ex vivo muscle contractile performance, and endurance exercise capacity in PDHmKO mice and wild-type (WT) littermates. Additionally, we studied glucose homeostasis and insulin sensitivity in muscle after 12 wk of HFD feeding. TMX administration largely ablated PDHα in skeletal muscle of adult PDHmKO mice but did not impact energy expenditure, muscle contractile function, or low-intensity exercise performance. Additionally, there were no differences in muscle insulin sensitivity or body composition in PDHmKO mice fed a control or HFD, as compared with WT mice. However, exercise capacity during high-intensity exercise was severely impaired in PDHmKO mice, in parallel with a large increase in plasma lactate concentration. In conclusion, although skeletal muscle PDC is not a major contributor to resting energy expenditure or long-duration, low-intensity exercise performance, it is necessary for optimal performance during high-intensity exercise.

Fast-Start Strategy Improves V˙O2 Kinetics and High-Intensity Exercise Performance

2011 ◽  
Vol 43 (3) ◽  
pp. 457-467 ◽  
Author(s):  
STEPHEN J. BAILEY ◽  
ANNI VANHATALO ◽  
FRED J. DIMENNA ◽  
DARYL P. WILKERSON ◽  
ANDREW M. JONES
Keyword(s):  
Exercise Performance ◽  
High Intensity ◽  
High Intensity Exercise ◽  
Fast Start

Failure of Glycine-Arginine-α-Ketoisocaproic Acid to Improve High-Intensity Exercise Performance in Trained Cyclists

2011 ◽  
Vol 21 (1) ◽  
pp. 33-39 ◽  
Author(s):  
Lukas Beis ◽  
Yaser Mohammad ◽  
Chris Easton ◽  
Yannis P. Pitsiladis
Keyword(s):  
Exercise Performance ◽  
High Intensity ◽  
Perceived Exertion ◽  
Cycle Ergometer ◽  
High Intensity Exercise ◽  
Ratings Of Perceived Exertion ◽  
Mean Power ◽  
Double Blind ◽  
Oral Supplementation ◽  
Experimental Trials

Oral supplementation with glycine-arginine-α-ketoisocaproic acid (GAKIC) has previously been shown to improve exhaustive high-intensity exercise performance. There are no controlled studies involving GAKIC supplementation in well-trained subjects. The aim of the current study was to examine the effects of GAKIC supplementation on fatigue during high-intensity, repeated cycle sprints in trained cyclists. After at least 2 familiarization trials, 10 well-trained male cyclists completed 2 supramaximal sprint tests each involving 10 sprints of 10 s separated by 50-s rest intervals on an electrically braked cycle ergometer. Subjects ingested 11.2 g of GAKIC or placebo (Pl) during a period of 45 min before the 2 experimental trials, administered in a randomized and double-blind fashion. Peak power declined from the 1st sprint (M ± SD; Pl 1,332 ± 307 W, GAKIC 1,367 ± 342 W) to the 10th sprint (Pl 1,091 ± 229 W, GAKIC 1,061 ± 272 W) and did not differ between conditions (p = .88). Mean power declined from the 1st sprint (Pl 892 ± 151 W, GAKIC 892 ± 153 W) to the 10th sprint (Pl 766 ± 120 W, GAKIC 752 ± 138 W) and did not differ between conditions (p = .96). The fatigue index remained at ~38% throughout the series of sprints and did not differ between conditions (p = .99). Heart rate and ratings of perceived exertion increased from the 1st sprint to the 10th sprint and did not differ between conditions (p = .11 and p = .83, respectively). In contrast to previous studies in untrained individuals, these results suggest that GAKIC has no ergogenic effect on repeated bouts of high-intensity exercise in trained individuals.

scholarly journals The Effects Of Rich Hydrogen And Oxygen Mixed Gas Inhalation After High Intensity Exercise Influence On Exercise Performance

2020 ◽  
Vol 52 (7S) ◽  
pp. 1024-1025
Author(s):  
Yudai Shibayama ◽  
Shohei Dobashi ◽  
Tamotsu Fukuoka ◽  
Takaaki Arisawa ◽  
Katsuhiro Koyama
Keyword(s):  
Exercise Performance ◽  
High Intensity ◽  
High Intensity Exercise ◽  
Mixed Gas ◽  
Gas Inhalation
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