scholarly journals EFFECT OF CAFFEINE INGESTION ON HIGH-INTENSITY INTERMITTENT EXERCISE PERFORMANCE IN ATHLETES

1999 ◽  
Vol 31 (Supplement) ◽  
pp. S402
Author(s):  
H. K. Whelan ◽  
D. T. Drinkwater
Keyword(s):  
Exercise Performance ◽  
High Intensity ◽  
Intermittent Exercise ◽  
Caffeine Ingestion

scholarly journals High-intensity intermittent exercise training with chlorella intake accelerates exercise performance and muscle glycolytic and oxidative capacity in rats

2017 ◽  
Vol 312 (4) ◽  
pp. R520-R528 ◽  
Author(s):  
Naoki Horii ◽  
Natsuki Hasegawa ◽  
Shumpei Fujie ◽  
Masataka Uchida ◽  
Eri Miyamoto-Mikami ◽  
...  
Keyword(s):  
Exercise Performance ◽  
Oxidative Metabolism ◽  
High Intensity ◽  
Citrate Synthase ◽  
Intermittent Exercise ◽  
Oxidative Capacity ◽  
Monocarboxylate Transporter ◽  
Peroxisome Proliferator ◽  
Sprague Dawley ◽  
Peroxisome Proliferator Activated Receptor

The purpose of this study was to investigate the effect of chronic chlorella intake alone or in combination with high-intensity intermittent exercise (HIIE) training on exercise performance and muscle glycolytic and oxidative metabolism in rats. Forty male Sprague-Dawley rats were randomly assigned to the four groups: sedentary control, chlorella intake (0.5% chlorella powder in normal feed), HIIE training, and combination of HIIE training and chlorella intake for 6 wk ( n = 10 each group). HIIE training comprised 14 repeats of a 20-s swimming session with a 10-s pause between sessions, while bearing a weight equivalent to 16% of body weight, 4 days/week. Exercise performance was tested after the interventions by measuring the maximal number of HIIE sessions that could be completed. Chlorella intake and HIIE training significantly increased the maximal number of HIIE sessions and enhanced the expression of monocarboxylate transporter (MCT)1, MCT4, and peroxisome proliferator-activated receptor γ coactivator-1α concomitantly with the activities of lactate dehydrogenase (LDH), phosphofructokinase, citrate synthase (CS), and cytochrome- c oxidase (COX) in the red region of the gastrocnemius muscle. Furthermore, the combination further augmented the increased exercise performance and the enhanced expressions and activities. By contrast, in the white region of the muscle, MCT1 expression and LDH, CS, and COX activities did not change. These results showed that compared with only chlorella intake and only HIIE training, chlorella intake combined with HIIE training has a more pronounced effect on exercise performance and muscle glycolytic and oxidative metabolism, in particular, lactate metabolism.

scholarly journals Acute ischemic preconditioning does not influence high-intensity intermittent exercise performance

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e4118 ◽  
Author(s):  
Isabela Coelho Marocolo ◽  
Gustavo Ribeiro da Mota ◽  
André Monteiro Londe ◽  
Stephen D. Patterson ◽  
Octávio Barbosa Neto ◽  
...  
Keyword(s):  
Heart Rate ◽  
Ischemic Preconditioning ◽  
Exercise Performance ◽  
High Intensity ◽  
Perceived Exertion ◽  
Intermittent Exercise ◽  
Lactate Concentration ◽  
Soccer Players ◽  
Rate Of Perceived Exertion ◽  
And Control

This study evaluated the acute effect of ischemic preconditioning (IPC) on a high-intensity intermittent exercise performance and physiological indicators in amateur soccer players. Thirteen players (21.5 ± 2 yrs) attended three trials separated by 3–5 days in a counterbalanced randomized cross-over design: IPC (4 × 5-min occlusion 220 mmHg/reperfusion 0 mmHg) in each thigh; SHAM (similar to the IPC protocol but “occlusion” at 20 mmHg) and control (seated during the same time of IPC). After 6-min of each trial (IPC, SHAM or control), the players performed the YoYo Intermittent Endurance Test level 2 (YoYoIE2). The distance covered in the YoYoIE2 (IPC 867 ± 205 m; SHAM 873 ± 212 m; control 921 ± 206 m) was not different among trials (p = 0.10), furthermore, lactate concentration and rate of perceived exertion did not differ (P > 0.05) among protocols. There were also no significant differences in either mean heart rate (HR) or peak HR (p > 0.05) for both IPC and SHAM compared to control. Therefore, we conclude that acute IPC does not influence high-intensity intermittent exercise performance in amateur soccer players and that rate of perceived exertion, heart rate and lactate do not differ between the intervention IPC, SHAM and control.

scholarly journals Effect of different methods of active recovery after high-intensity exercise on intermittent exercise performance of soccer referees

2017 ◽  
Vol 6 (5) ◽  
pp. 335-342
Author(s):  
Takuma Yanaoka ◽  
Tetsuhiro Kidokoro ◽  
Kanako Edamoto ◽  
Kyoko Kashiwabara ◽  
Jumpei Yamagami ◽  
...  
Keyword(s):  
Exercise Performance ◽  
High Intensity ◽  
Intermittent Exercise ◽  
High Intensity Exercise ◽  
Active Recovery

scholarly journals Effects of Various Doses of Caffeine Ingestion on Intermittent Exercise Performance and Cognition

2020 ◽  
Vol 10 (9) ◽  
pp. 595 ◽  
Author(s):  
Cuicui Wang ◽  
Yuechuan Zhu ◽  
Cheng Dong ◽  
Zigui Zhou ◽  
Xinyan Zheng
Keyword(s):  
Stroop Task ◽  
Exercise Performance ◽  
Power Output ◽  
Intermittent Exercise ◽  
Peak Power Output ◽  
High Dose ◽  
Double Blind ◽  
Caffeine Ingestion ◽  
Positive Effects ◽  
The Mean

To date, no study has examined the effects of caffeine on prolonged intermittent exercise performance that imitates certain team-sports, and the suitable concentration of caffeine for improved intermittent exercise performance remains elusive. The purpose of the present cross-over, double-blind preliminary study was to investigate effects of low, moderate, and high doses of caffeine ingestion on intermittent exercise performance and cognition. Ten males performed a familiarization session and four experimental trials. Participants ingested capsules of placebo or caffeine (3, 6, or 9 mg/kg) at 1 h before exercise, rested quietly, and then performed cycling for 2 × 30 min. The cycling protocol consisted of maximal power pedaling for 5 s (mass × 0.075 kp) every minute, separated by unloaded pedaling for 25 s and rest for 30 s. At pre-ingestion of capsules, 1 h post-ingestion, and post-exercise, participants completed the Stroop task. The mean power-output (MPO), peak power-output (PPO), and response time (RT) in the Stroop task were measured. Only 3 mg/kg of caffeine had positive effects on the mean PPO and MPO; 3 mg/kg caffeine decreased RTs significantly in the incongruent and congruent conditions. These results indicate that the ingestion of low-dose caffeine had greater positive effects on the participants’ physical strength during prolonged intermittent exercise and cognition than moderate- or high-dose caffeine.

Caffeine intake improves intense intermittent exercise performance and reduces muscle interstitial potassium accumulation

2011 ◽  
Vol 111 (5) ◽  
pp. 1372-1379 ◽  
Author(s):  
Magni Mohr ◽  
Jens Jung Nielsen ◽  
Jens Bangsbo
Keyword(s):  
Exercise Performance ◽  
Intermittent Exercise ◽  
Knee Extension ◽  
Caffeine Intake ◽  
Caffeine Ingestion ◽  
Potassium Accumulation ◽  
Knee Extension Exercise ◽  
Peak Blood ◽  
Peak Blood Glucose

The effect of oral caffeine ingestion on intense intermittent exercise performance and muscle interstitial ion concentrations was examined. The study consists of two studies (S1 and S2). In S1, 12 subjects completed the Yo-Yo intermittent recovery level 2 (Yo-Yo IR2) test with prior caffeine (6 mg/kg body wt; CAF) or placebo (PLA) intake. In S2, 6 subjects performed one low-intensity (20 W) and three intense (50 W) 3-min (separated by 5 min) one-legged knee-extension exercise bouts with (CAF) and without (CON) prior caffeine supplementation for determination of muscle interstitial K+ and Na+ with microdialysis. In S1 Yo-Yo IR2 performance was 16% better ( P < 0.05) in CAF compared with PLA. In CAF, plasma K+ at the end of the Yo-Yo IR2 test was 5.2 ± 0.1 mmol/l with no difference between the trials. Plasma free fatty acids (FFA) were higher ( P < 0.05) in CAF than PLA at rest and remained higher ( P < 0.05) during exercise. Peak blood glucose (8.0 ± 0.6 vs. 6.2 ± 0.4 mmol/l) and plasma NH3 (137.2 ± 10.8 vs. 113.4 ± 13.3 μmol/l) were also higher ( P < 0.05) in CAF compared with PLA. In S2 interstitial K+ was 5.5 ± 0.3, 5.7 ± 0.3, 5.8 ± 0.5, and 5.5 ± 0.3 mmol/l at the end of the 20-W and three 50-W periods, respectively, in CAF, which were lower ( P < 0.001) than in CON (7.0 ± 0.6, 7.5 ± 0.7, 7.5 ± 0.4, and 7.0 ± 0.6 mmol/l, respectively). No differences in interstitial Na+ were observed between CAF and CON. In conclusion, caffeine intake enhances fatigue resistance and reduces muscle interstitial K+ during intense intermittent exercise.

Caffeine Ingestion and High Intensity Intermittent Exercise

1994 ◽  
Vol 87 (s1) ◽  
pp. 64-64
Author(s):  
M Jackman ◽  
P Wendling ◽  
D Friars ◽  
T Graham
Keyword(s):  
High Intensity ◽  
Intermittent Exercise ◽  
Caffeine Ingestion
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