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High intensity interval training hypoxia

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https://www.readbyqxmd.com/read/28706859/role-of-metabolic-stress-for-enhancing-muscle-adaptations-practical-applications
#1
REVIEW
Marcelo Conrado de Freitas, Jose Gerosa-Neto, Nelo Eidy Zanchi, Fabio Santos Lira, Fabrício Eduardo Rossi
Metabolic stress is a physiological process that occurs during exercise in response to low energy that leads to metabolite accumulation [lactate, phosphate inorganic (Pi) and ions of hydrogen (H(+))] in muscle cells. Traditional exercise protocol (i.e., Resistance training) has an important impact on the increase of metabolite accumulation, which influences hormonal release, hypoxia, reactive oxygen species (ROS) production and cell swelling. Changes in acute exercise routines, such as intensity, volume and rest between sets, are determinants for the magnitude of metabolic stress, furthermore, different types of training, such as low-intensity resistance training plus blood flow restriction and high intensity interval training, could be used to maximize metabolic stress during exercise...
June 26, 2017: World Journal of Methodology
https://www.readbyqxmd.com/read/28646182/high-intensity-interval-training-improves-mitochondrial-function-and-suppresses-thrombin-generation-in-platelets-undergoing-hypoxic-stress
#2
Li-Hua Wu, Shao-Chiang Chang, Tieh-Cheng Fu, Ching-Hui Huang, Jong-Shyan Wang
This study elucidates how high-intensity interval training (HIT) and moderate-intensity continuous training (MCT) affect mitochondrial functionality and thrombin generation (TG) in platelets following hypoxic exercise (HE, 100 W under 12% O2 for 30 min). Forty-five healthy sedentary males were randomized to engage either HIT (3-minute intervals at 40% and 80%VO2max, n = 15) or MCT (sustained 60%VO2max, n = 15) for 30 minutes/day, 5 days/week for 6 weeks, or to a control group (CTL, n = 15) that did not received exercise intervention...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28620311/physiological-adaptations-to-hypoxic-vs-normoxic-training-during-intermittent-living-high
#3
Stefan De Smet, Paul van Herpt, Gommaar D'Hulst, Ruud Van Thienen, Marc Van Leemputte, Peter Hespel
In the setting of "living high," it is unclear whether high-intensity interval training (HIIT) should be performed "low" or "high" to stimulate muscular and performance adaptations. Therefore, 10 physically active males participated in a 5-week "live high-train low or high" program (TR), whilst eight subjects were not engaged in any altitude or training intervention (CON). Five days per week (~15.5 h per day), TR was exposed to normobaric hypoxia simulating progressively increasing altitude of ~2,000-3,250 m...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28479953/effects-of-simulated-altitude-on-maximal-oxygen-uptake-and-inspiratory-fitness
#4
Nicole C Biggs, Benjamin S England, Nicole J Turcotte, Melissa R Cook, Alyne L Williams
Aerobic exercise at altitude has shown an increase in maximal oxygen uptake. Similar effects have been replicated by way of simulated altitude training, which have influenced various advances in the field of exercise science. Elevation Training Masks© (ETM) claim to stimulate cardiorespiratory fitness improvements similar to training at altitude, however, there is little research to support this claim. The purpose of this study was to research the effect that a hypoxia-inducing mask would have on cardiorespiratory fitness and pulmonary function through the use of a high intensity interval training (HIIT) running program...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/28386234/high-intensity-interval-training-in-normobaric-hypoxia-improves-cardiorespiratory-fitness-in-overweight-chinese-young-women
#5
Zhaowei Kong, Qingde Shi, Jinlei Nie, Tomas K Tong, Lili Song, Longyan Yi, Yang Hu
Previous studies have investigated the effects of high-intensity interval training (HIIT) on cardiorespiratory fitness and body composition in overweight populations. However, the additive effect of HIIT and hypoxia on health parameters is not clear. This study compared the effects of HIIT under hypoxic conditions on cardiometabolic function with that under normoxia in overweight Chinese young women. Methods: A double-blind randomized controlled experimental design was applied. Twenty-four sedentary overweight Chinese young women (weight: 68...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28368957/impact-of-endurance-exercise-in-hypoxia-on-muscle-damage-inflammatory-and-performance-responses
#6
Daichi Sumi, Chihiro Kojima, Kazushige Goto
This study evaluated muscle damage and inflammatory and performance responses following high-intensity endurance exercise in moderate hypoxia among endurance athletes. Nine trained endurance athletes completed two different trials on different days: exercise under moderate hypoxia (H trial, FiO2 = 14.5%) and normoxia (N trial, FiO2 = 20.9%). They performed interval exercises (10 × 3-min running at 95% of VO2max with 60-s of active rest at 60% of VO2max) followed by 30-min of continuous running at 85% of VO2max under either hypoxic or normoxic conditions...
March 25, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27761657/high-intensity-interval-training-enhances-mobilization-functionality-of-endothelial-progenitor-cells-and-depressed-shedding-of-vascular-endothelial-cells-undergoing-hypoxia
#7
RANDOMIZED CONTROLLED TRIAL
Hsing-Hua Tsai, Chin-Pu Lin, Yi-Hui Lin, Chih-Chin Hsu, Jong-Shyan Wang
PURPOSE: Exercise training improves endothelium-dependent vasodilation, whereas hypoxic stress causes vascular endothelial dysfunction. Monocyte-derived endothelial progenitor cells (Mon-EPCs) contribute to vascular repair process by differentiating into endothelial cells. This study investigates how high-intensity interval (HIT) and moderate-intensity continuous (MCT) exercise training affect circulating Mon-EPC levels and EPC functionality under hypoxic condition. METHODS: Sixty healthy sedentary males were randomized to engage in either HIT (3-min intervals at 40 and 80 % VO2max for five repetitions, n = 20) or MCT (sustained 60 % VO2max, n = 20) for 30 min/day, 5 days/week for 6 weeks, or to a control group (CTL) that did not received exercise intervention (n = 20)...
December 2016: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/27731374/exercise-training-alleviates-hypoxia-induced-mitochondrial-dysfunction-in-the-lymphocytes-of-sedentary-males
#8
Hsing-Hua Tsai, Shao-Chiang Chang, Cheng-Hsien Chou, Tzu-Pin Weng, Chih-Chin Hsu, Jong-Shyan Wang
This study elucidates how interval and continuous exercise regimens affect the mitochondrial functionality of lymphocytes under hypoxic stress. Sixty healthy sedentary males were randomly assigned to engage in either high-intensity interval training (HIIT, 3 min intervals at 80% and 40% VO2max, n = 20) or moderate-intensity continuous training (MICT, sustained 60% VO2max, n = 20) for 30 min/day, 5 days/week for 6 weeks or were assigned to a control group that did not receive exercise intervention (n = 20)...
October 12, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27274656/cardiorespiratory-effects-of-one-legged-high-intensity-interval-training-in-normoxia-and-hypoxia-a-pilot-study
#9
Verena Menz, Mona Semsch, Florian Mosbach, Martin Burtscher
A higher-than-average maximal oxygen consumption (VO2max), is closely associated with decreased morbidity and mortality and improved quality of life and acts as a marker of cardiorespiratory fitness. Although there is no consensus about an optimal training method to enhance VO2max, nevertheless training of small muscle groups and repeated exposure to hypoxia seem to be promising approaches. Therefore, this study was aimed at gaining innovative insights into the effects of small muscle group training in normoxia and hypoxia...
June 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/26566220/effects-of-high-intensity-interval-training-on-pregnant-rats-and-the-placenta-heart-and-liver-of-their-fetuses
#10
Nils Thomas Songstad, Knut-Helge Frostmo Kaspersen, Anne Dragøy Hafstad, Purusotam Basnet, Kirsti Ytrehus, Ganesh Acharya
OBJECTIVE: To investigate the effects of high intensity interval training (HIIT) on the maternal heart, fetuses and placentas of pregnant rats. METHODS: Female Sprague-Dawley rats were randomly assigned to HIIT or sedentary control groups. The HIIT group was trained for 6 weeks with 10 bouts of high intensity uphill running on a treadmill for four minutes (at 85-90% of maximal oxygen consumption) for five days/week. After three weeks of HIIT, rats were mated. After six weeks (gestational day 20 in pregnant rats), echocardiography was performed to evaluate maternal cardiac function...
2015: PloS One
https://www.readbyqxmd.com/read/25946570/aging-tolerance-to-high-altitude-and-cardiorespiratory-response-to-hypoxia
#11
Jean-Paul Richalet, François J Lhuissier
Richalet, Jean-Paul, and François J. Lhuissier. Aging, tolerance to high altitude, and cardiorespiratory response to hypoxia. High Alt Med Biol. 16:117-124, 2015.--It is generally accepted that aging is rather protective, at least at moderate altitude. Some anecdotal reports even mention successful ascent of peaks over 8000 m and even Everest by elderly people. However, very few studies have explored the influence of aging on tolerance to high altitude and prevalence of acute high altitude related diseases, taking into account all confounding factors such as speed of ascent, altitude reached, sex, training status, and chemo-responsiveness...
June 2015: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/25944456/changes-in-running-performance-after-four-weeks-of-interval-hypoxic-training-in-australian-footballers-a-single-blind-placebo-controlled-study
#12
Blake D McLean, Paul J Tofari, Christopher J Gore, Justin G Kemp
There is a paucity of data examining the impact of high-intensity interval hypoxic training (IHT) on intermittent running performance. This study assessed the effects of IHT on 17 amateur Australian Footballers, who completed 8 interval treadmill running sessions (IHT [FIO2 = 15.1%] or PLACEBO) over 4 weeks, in addition to normoxic football (2 per week) and resistance (2 per week) training sessions. To match relative training intensity, absolute IHT intensity reduced by 6% of normoxic vV[Combining Dot Above]O2peak compared with PLACEBO...
November 2015: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/25803693/high-intensity-interval-and-endurance-training-have-opposing-effects-on-markers-of-heart-failure-and-cardiac-remodeling-in-hypertensive-rats
#13
Tanya M Holloway, Darin Bloemberg, Mayne L da Silva, Jeremy A Simpson, Joe Quadrilatero, Lawrence L Spriet
There has been re-emerging interest and significant work dedicated to investigating the metabolic effects of high intensity interval training (HIIT) in recent years. HIIT is considered to be a time efficient alternative to classic endurance training (ET) that elicits similar metabolic responses in skeletal muscle. However, there is a lack of information on the impact of HIIT on cardiac muscle in disease. Therefore, we determined the efficacy of ET and HIIT to alter cardiac muscle characteristics involved in the development of diastolic dysfunction, such as ventricular hypertrophy, fibrosis and angiogenesis, in a well-established rodent model of hypertension-induced heart failure before the development of overt heart failure...
2015: PloS One
https://www.readbyqxmd.com/read/25435785/the-effects-of-hypobaric-hypoxia-on-erythropoiesis-maximal-oxygen-uptake-and-energy-cost-of-exercise-under-normoxia-in-elite-biathletes
#14
Milosz Czuba, Adam Maszczyk, Dagmara Gerasimuk, Robert Roczniok, Olga Fidos-Czuba, Adam Zając, Artur Gołaś, Aleksandra Mostowik, Jozef Langfort
The aim of the present study was to evaluate the effects of 3 weeks altitude training according to the HiHiLo (live high-base train high-interval train low) procedure as described by Chapman et al. (1998), on erythropoiesis, maximal oxygen uptake and energy cost of exercise under normoxia in elite biathletes. Fifteen male elite biathletes randomly divided into an experimental (H) group (n = 7; age 27.1 ± 4.6 years; maximal oxygen uptake (VO2max) 66.9 ± 3.3 ml·kg(-1)·min(-1); body height (BH) 1.81 ± 0.06 m; body mass (BM) 73...
December 2014: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/24849544/application-of-live-low-train-high-for-enhancing-normoxic-exercise-performance-in-team-sport-athletes
#15
REVIEW
Blake D McLean, Christopher J Gore, Justin Kemp
BACKGROUND AND OBJECTIVE: Hypoxic training techniques are increasingly used by athletes in an attempt to improve performance in normoxic environments. The 'live low-train high (LLTH)' model of hypoxic training may be of particular interest to athletes because LLTH protocols generally involve shorter hypoxic exposures (approximately two to five sessions per week of <3 h) than other traditional hypoxic training techniques (e.g., live high-train high or live high-train low). However, the methods employed in LLTH studies to date vary greatly with respect to exposure times, training intensities, training modalities, degrees of hypoxia and performance outcomes assessed...
September 2014: Sports Medicine
https://www.readbyqxmd.com/read/24511346/the-effects-of-high-intensity-interval-training-in-normobaric-hypoxia-on-aerobic-capacity-in-basketball-players
#16
Miłosz Czuba, Adam Zając, Adam Maszczyk, Robert Roczniok, Stanisław Poprzęcki, Wiesław Garbaciak, Tomasz Zając
The aim of the present study was to evaluate the efficacy of 3-week high intensity interval training in normobaric hypoxia (IHT) on aerobic capacity in basketball players. Twelve male well trained basketball players, randomly divided into a hypoxia (H) group (n=6; age: 22±1.6 years; VO2max: 52.6±3.9 ml/kg/min; body height - BH: 188.8±6.1 cm; body mass - BM: 83.9±7.2 kg; % of body fat - FAT%: 11.2±3.1%), and a control (C) group (n=6; age: 22±2.4 years; VO2max: 53.0±5.2 ml/kg/min; BH: 194.3 ± 6.6 cm; BM: 99...
December 18, 2013: Journal of Human Kinetics
https://www.readbyqxmd.com/read/24282207/advancing-hypoxic-training-in-team-sports-from-intermittent-hypoxic-training-to-repeated-sprint-training-in-hypoxia
#17
REVIEW
Raphaël Faiss, Olivier Girard, Grégoire P Millet
Over the past two decades, intermittent hypoxic training (IHT), that is, a method where athletes live at or near sea level but train under hypoxic conditions, has gained unprecedented popularity. By adding the stress of hypoxia during 'aerobic' or 'anaerobic' interval training, it is believed that IHT would potentiate greater performance improvements compared to similar training at sea level. A thorough analysis of studies including IHT, however, leads to strikingly poor benefits for sea-level performance improvement, compared to the same training method performed in normoxia...
December 2013: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/24236174/effects-of-interval-and-continuous-exercise-training-on-cd4-lymphocyte-apoptotic-and-autophagic-responses-to-hypoxic-stress-in-sedentary-men
#18
Tzu-Pin Weng, Shu-Chun Huang, Yu-Fen Chuang, Jong-Shyan Wang
Exercise is linked with the type/intensity-dependent adaptive immune responses, whereas hypoxic stress facilitates the programmed death of CD4 lymphocytes. This study investigated how high intensity-interval (HIT) and moderate intensity-continuous (MCT) exercise training influence hypoxia-induced apoptosis and autophagy of CD4 lymphocytes in sedentary men. Thirty healthy sedentary males were randomized to engage either HIT (3-minute intervals at 40% and 80%VO2max, n=10) or MCT (sustained 60%VO2max, n=10) for 30 minutes/day, 5 days/week for 5 weeks, or to a control group that did not received exercise intervention (CTL, n=10)...
2013: PloS One
https://www.readbyqxmd.com/read/22994058/-the-combined-application-of-hypoxytherapy-and-oxygen-therapy-for-the-spa-and-resort-based-treatment-of-bronchial-asthma
#19
(no author information available yet)
We undertook the comprehensive examination and treatment with the interval hypoxic training and enteral oxygen therapy of 285 patients presenting with mild and moderately severe bronchial asthma. The study has demonstrated the improvement of oxygen supply to various organs at all stages of its mass transfer and the enhanced oxygen consumption by the tissue. These effects promoted normalization of the function of the respiratory system, characteristics of the exhaled air condensate, the state of the pro-oxidant and anti-oxidant systems...
July 2012: Voprosy Kurortologii, Fizioterapii, i Lechebnoĭ Fizicheskoĭ Kultury
https://www.readbyqxmd.com/read/22845561/enhancing-team-sport-athlete-performance-is-altitude-training-relevant
#20
REVIEW
François Billaut, Christopher J Gore, Robert J Aughey
Field-based team sport matches are composed of short, high-intensity efforts, interspersed with intervals of rest or submaximal exercise, repeated over a period of 60-120 minutes. Matches may also be played at moderate altitude where the lower oxygen partial pressure exerts a detrimental effect on performance. To enhance run-based performance, team-sport athletes use varied training strategies focusing on different aspects of team-sport physiology, including aerobic, sprint, repeated-sprint and resistance training...
September 1, 2012: Sports Medicine
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