scholarly journals Peer Review #2 of "Acute ischemic preconditioning does not influence high-intensity intermittent exercise performance (v0.2)"

2017 ◽  
Keyword(s):  
Peer Review ◽  
Ischemic Preconditioning ◽  
Exercise Performance ◽  
High Intensity ◽  
Intermittent Exercise

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 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.

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