scholarly journals Pilot study: an acute bout of high intensity interval exercise increases 12.5 h GH secretion

2018 ◽  
Vol 6 (2) ◽  
pp. e13563 ◽  
Author(s):  
Sarah E. Deemer ◽  
Todd J. Castleberry ◽  
Chris Irvine ◽  
Daniel E. Newmire ◽  
Michael Oldham ◽  
...  
Keyword(s):  
Pilot Study ◽  
High Intensity ◽  
Acute Bout ◽  
Interval Exercise ◽  
Gh Secretion ◽  
High Intensity Interval

scholarly journals Cerebrovascular Response to an Acute Bout of Short Interval High Intensity Interval Exercise and Recovery in Healthy Adults

2021 ◽  
Author(s):  
Alicen A. Whitaker ◽  
Stacey E. Aaron ◽  
Carolyn S. Kaufman ◽  
Brady K. Kurtz ◽  
Stephen X. Bai ◽  
...  
Keyword(s):  
High Intensity ◽  
Short Interval ◽  
Healthy Adults ◽  
Acute Bout ◽  
Interval Exercise ◽  
Low Intensity ◽  
The Third ◽  
Secondary Objective ◽  
High Intensity Interval ◽  
End Tidal

Introduction: High intensity interval exercise (HIIE) is performed widely. However, the field possesses limited knowledge regarding the acute HIIE cerebrovascular response. Our objective was to characterize the middle cerebral artery blood velocity (MCAv) response during an acute bout of short interval HIIE in healthy adults. We hypothesized MCAv would decrease below BL 1) during HIIE, 2) following HIIE, 3) and 30-minutes after HIIE. As a secondary objective, we investigated sex differences in the MCAv response during HIIE. Methods: Fourteen healthy adults (7 male) completed the HIIE session. The 10-minute HIIE session included alternating 1-minute bouts of high-intensity and low-intensity intervals. MCAv, mean arterial pressure (MAP), heart rate (HR), and expired end tidal carbon dioxide (PETCO2), were recorded at BL, during HIIE, following HIIE, and 30-minutes after HIIE. Results: Contrary to our hypothesis, MCAv remained above BL for the HIIE duration. MCAv peaked at the third minute then decreased concomitantly with PETCO2. MCAv was lower than BL after HIIE (p=0.03). Thirty minutes after HIIE, MCAv returned to near BL values (p = 0.47). Women showed higher BL MCAv (x = 70.9 ± 8.1 cm/s) compared to men (x = 59.3 ± 5.8 cm/s, p = 0.01). A greater magnitude of MCAv response was observed in men resulting in non-significant differences during HIIE secondary to higher workload (p = 0.03). Conclusions: Collectively, these findings show that in healthy adults, MCAv remained above BL during a 10-minute short-interval HIIE and returned to resting values 30 minutes after exercise.

Acute effect of high-intensity interval exercise and moderate-intensity continuous exercise on appetite in overweight/obese males: a pilot study

2017 ◽  
Vol 13 (2) ◽  
pp. 403-410 ◽  
Author(s):  
Victor Araújo Ferreira Matos ◽  
Daniel Costa de Souza ◽  
Rodrigo Alberto Vieira Browne ◽  
Victor Oliveira Albuquerque dos Santos ◽  
Eduardo Caldas Costa ◽  
...  
Keyword(s):  
Pilot Study ◽  
High Intensity ◽  
Acute Effect ◽  
Moderate Intensity ◽  
Interval Exercise ◽  
Continuous Exercise ◽  
High Intensity Interval

scholarly journals The Effects of High-Intensity Interval Exercise and Hypoxia on Cognition in Sedentary Young Adults

Medicina ◽  
2019 ◽  
Vol 55 (2) ◽  
pp. 43 ◽  
Author(s):  
Shengyan Sun ◽  
Paul D. Loprinzi ◽  
Hongwei Guan ◽  
Liye Zou ◽  
Zhaowei Kong ◽  
...  
Keyword(s):  
Reaction Time ◽  
Cognitive Function ◽  
High Intensity ◽  
Cognitive Task ◽  
Response Accuracy ◽  
Acute Bout ◽  
Moderate Hypoxia ◽  
Interval Exercise ◽  
Hypoxic Conditions ◽  
High Intensity Interval

Background and Objectives: Limited research has evaluated the effects of acute exercise on cognition under different conditions of inspired oxygenation. Thus, the purpose of this study was to examine the effects of high-intensity interval exercise (HIE) under normoxia (inspired fraction of oxygen (FIO2): 0.209) and moderate hypoxia (FIO2: 0.154) on cognitive function. Design: A single-blinded cross-over design was used to observe the main effects of exercise and oxygen level, and interaction effects on cognitive task performance. Methods: Twenty inactive adults (10 males and 10 females, 19–27 years old) performed a cognitive task (i.e., the Go/No-Go task) before and immediately after an acute bout of HIE under normoxic and hypoxic conditions. The HIE comprised 10 repetitions of 6 s high-intensity cycling against 7.5% body weight interspersed with 30 s passive recovery. Heart rate, peripheral oxygen saturation (SpO2) and rating of perceived exertion were monitored. Results: The acute bout of HIE did not affect the reaction time (p = 0.204, η2 = 0.083) but the accuracy rate decreased significantly after HIE under both normoxic and hypoxic conditions (p = 0.001, η2 = 0.467). Moreover, moderate hypoxia had no influence either on reaction time (p = 0.782, η2 = 0.004) or response accuracy (p = 0.972, η2 < 0.001). Conclusions: These results indicate that an acute session of HIE may impair response accuracy immediately post-HIE, without sacrificing reaction time. Meanwhile moderate hypoxia was found to have no adverse effect on cognitive function in inactive young adults, at least in the present study.

Improved Insulin Sensitivity Following an Acute Bout of High Intensity Interval Exercise is Race Specific

2015 ◽  
Vol 47 ◽  
pp. 142-143
Author(s):  
Stephen J. Carter ◽  
Gordon Fisher ◽  
Eric P. Plaisance ◽  
Barbara A. Gower ◽  
Gary R. Hunter
Keyword(s):  
Insulin Sensitivity ◽  
High Intensity ◽  
Acute Bout ◽  
Interval Exercise ◽  
High Intensity Interval

Classroom-based high-intensity interval activity improves off-task behaviour in primary school students

2014 ◽  
Vol 39 (12) ◽  
pp. 1332-1337 ◽  
Author(s):  
Jasmin K. Ma ◽  
Lucy Le Mare ◽  
Brendon J. Gurd
Keyword(s):  
Physical Activity ◽  
Primary School ◽  
High Intensity ◽  
Primary School Students ◽  
School Students ◽  
Acute Bout ◽  
Interval Exercise ◽  
Regular Class ◽  
Classroom Behaviour ◽  
High Intensity Interval

This study examined the effects of an acute bout of brief, high-intensity interval exercise on off-task classroom behaviour in primary school students. A grade 4 class (n = 24) and a grade 2 class (n = 20) were exposed to either a no-activity break or an active break that consisted of “FUNtervals”, a high-intensity interval protocol, on alternating days for 3 weeks. No-activity days consisted of a 10-min inactive break while FUNterval days consisted of a 4-min FUNterval completed within a 10-min break from regular class activities. Off-task behaviour was observed for 50 min after each no-activity/FUNterval break, with the amount of time students spent off-task (motor, passive, and verbal behaviour) being recorded. When comparing no-activity breaks with FUNtervals the grade 4 class demonstrated reductions in both passive (no activity = 29% ± 13% vs. FUNterval = 25% ± 13%, p < 0.05, effect size (ES) = 0.31) and motor (no activity = 31% ± 16% vs. FUNterval = 24% ± 13%, p < 0.01, ES = 0.48) off-task behaviour following FUNtervals. Similarly, in the grade 2 class, passive (no activity = 23% ± 14% vs. FUNterval = 14% ± 10%, p < 0.01, ES = 0.74), verbal (no activity = 8% ± 8% vs. FUNterval = 5% ± 5%, p < 0.05, ES = 0.45), and motor (no activity = 29% ± 17% vs. FUNterval = 14% ± 10%, p < 0.01, ES = 1.076) off-task behaviours were reduced following FUNtervals. In both classrooms the effects of physical activity were greatest in those students demonstrating the highest rates of off-task behaviour on no-activity days. These data demonstrate that very brief high-intensity bouts of exercise can improve off-task behaviour in grade 2 and 4 students, particularly in students with high rates of such behaviour.

Sleeping/Resting Energy Expenditure Is Significantly Increased Following an Acute Bout of High Intensity Interval Exercise

2015 ◽  
Vol 47 ◽  
pp. 642
Author(s):  
Gary R. Hunter ◽  
Gordon Fisher ◽  
Stephen J. Carter ◽  
Marcas M. Bamman ◽  
Doug R. Moellering ◽  
...  
Keyword(s):  
Energy Expenditure ◽  
High Intensity ◽  
Resting Energy Expenditure ◽  
Acute Bout ◽  
Interval Exercise ◽  
High Intensity Interval ◽  
Resting Energy

scholarly journals Methods to match high-intensity interval exercise intensity in hypoxia and normoxia – A pilot study

2021 ◽  
Author(s):  
Yanchun Li ◽  
Jia Li ◽  
Muhammed M. Atakan ◽  
Zhenhuan Wang ◽  
Yang Hu ◽  
...  
Keyword(s):  
Pilot Study ◽  
Exercise Intensity ◽  
High Intensity ◽  
Interval Exercise ◽  
High Intensity Interval
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