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Interval training HIIT

Robin A Wilson, William Deasy, Christos G Stathis, Alan Hayes, Matthew B Cooke
Intermittent fasting (IF) and high intensity interval training (HIIT) are effective lifestyle interventions for improving body composition and overall health. However, the long-term effects of IF and potential synergistic effects of combining IF with exercise are unclear. The purpose of the study was to investigate the long-term effects of IF, with or without HIIT, on body composition and markers of metabolic health in diet-induced obese mice. In a randosmised, controlled design, 8-week-old C57BL/6 mice (males ( n = 39) and females ( n = 49)) were fed a high fat (HF) and sugar (S) water diet (30% ( w / v )) for 24-weeks but were separated into five groups at 12-weeks: (1) 'obese' baseline control (OBC); (2) no intervention (CON); (3) intermittent fasting (IF); (4) high intensity intermittent exercise (HIIT) and (5) combination of dietary and exercise intervention (IF + HIIT)...
March 12, 2018: Nutrients
A Delextrat, M Gruet, F Bieuzen
The aim of the current study was to compare the effects of 6 weeks of small-sided game (SSG) and high-intensity interval training (HIIT) on aerobic fitness and muscle oxygenation during a repeated sprint (RS) sequence in elite male junior basketball players. Twenty participants (14.3 ± 0.5 years; 176.8 ± 12.5 cm; 74.5 ± 9.8 kg) performed pre- and post-tests interspersed by 6-weeks of SSG or HIIT training. Testing sessions consisted of the 30-15 Intermittent Fitness Test and a RS sequence (two bouts of 15-s)...
March 6, 2018: Journal of Strength and Conditioning Research
Florence-Emilie Kinnafick, Cecilie Thøgersen-Ntoumani, Sam O Shepherd, Oliver J Wilson, Anton J M Wagenmakers, Christopher S Shaw
Using guidance from the reach, efficacy, adoption, implementation, and maintenance evaluation framework, we aimed to qualitatively evaluate the participant experiences of a workplace high-intensity interval training (HIIT) intervention. Twelve previously insufficiently active individuals (four males and eight females) were interviewed once as part of three focus groups. Perceptions of program satisfaction, barriers to and facilitators of adherence, and persistence to exercise were explored. HIIT initiates interest because of its novelty, provides a sense of accomplishment, and overcomes the barriers of perceived lack of time...
March 9, 2018: Journal of Sport & Exercise Psychology
Lukas Streese, Arne Deiseroth, Juliane Schäfer, Arno Schmidt-Trucksäss, Henner Hanssen
Background: Age is a key determinant for the development of cardiovascular disease and higher age coincides with an increased prevalence of obesity and physical inactivity. The study examines the influence of physical activity on aging processes of physiological systems focusing on the mechanisms of vascular aging. Methods/Design: The study consists of two parts. The cross-sectional approach aims at examining the association of physical fitness and cardiovascular risk with large and small artery function in healthy older active (HOA, n = 40) and sedentary (HOS, n = 40) persons as well as older sedentary individuals with increased cardiovascular risk (OSR, n = 80) aged 50-80 years...
2018: Frontiers in Physiology
Marwa Khammassi, Nejmeddine Ouerghi, Sameh Hadj-Taieb, Moncef Feki, David Thivel, Anissa Bouassida
Although High-intensity interval training (HIIT) has shown its effectiveness in improving body composition, cardio-respiratory fitness and lipid profile in obese adults, evidences remain limited in overweight/obese youth. This study was conducted to investigate the effect of a 12-week HIIT program without caloric restriction on body composition and lipid profile among young overweight/obese men. Twenty healthy obese youth were randomly allocated into two groups; experimental group (HIIT) and control group. The HIIT program consisted in 3 exercises sessions per week (30 sec of work at 100% maximal aerobic velocity [MAV]) interspersed by 30 sec of active recovery at 50% MAV, starting by 15 repetitions to reach 27 by the end of the program...
February 2018: Journal of Exercise Rehabilitation
Sara Maldonado-Martín, Jon Ander Jayo-Montoya, Tatiana Matajira-Chia, Beatriz Villar-Zabala, Juan José Goiriena, G Rodrigo Aispuru
BACKGROUND: Exercise therapy has long been used for rehabilitation purposes after myocardial infarction (MI) and the benefit of regular physical exercise is also well-established. High-intensity interval training (HIIT) has been proposed to be more effective than continuous exercise for improving exercise capacity and health-related adaptations to low-volume (LV) and HIIT are also known. Furthermore, the Mediterranean diet (Mediet) has been widely reported to be a model of healthy eating for its contribution to a favorable health status and a better quality of life, reducing overall mortality...
March 2, 2018: Trials
Rachel Tan, Joshua P Nederveen, Jenna B Gillen, Sophie Joanisse, Gianni Parise, Mark A Tarnopolsky, Martin J Gibala
High-intensity interval training (HIIT) enhances skeletal muscle oxygen delivery and utilization but data are limited regarding fiber-specific adaptations in humans. We examined the effect of 18 sessions of HIIT (10 × 60-sec cycling intervals at ~90% HRmax , interspersed by 60-sec of recovery) over 6 weeks on markers of microvascular density and oxidative capacity in type I and II fibers in healthy but sedentary young women (Age: 26 ± 7 years; BMI: 30 ± 4 kg·m-2 ; VO2peak : 2.16 ± 0.45 L·m-1 )...
March 2018: Physiological Reports
Jaime Gallo-Villegas, Juan Carlos Aristizabal, Mauricio Estrada, Luis H Valbuena, Raul Narvaez-Sanchez, Jorge Osorio, Daniel C Aguirre-Acevedo, Juan C Calderón
BACKGROUND: Evidence of the efficacy of high-intensity, low-volume interval training (HIIT-low volume) in treating insulin resistance (IR) in patients with metabolic disorders is contradictory. In addition, it is unknown whether this effect is mediated through muscle endocrine function, which in turn depends on muscle mass and fiber type composition. Our aims were to assess the efficacy of HIIT-low volume compared to continuous aerobic exercise (CAE) in treating IR in adults with metabolic syndrome (MS) and to establish whether musclin, apelin, muscle mass and muscle composition are mediators of the effect...
February 27, 2018: Trials
Hossein Shirvani, Ehsan Arabzadeh
PURPOSE: An imbalance in the production of adipokines and myokines impairs the energy expenditure, increases adipocyte and develops metabolic pathologies. Physical exercise is able to regulate the secretion of myokines and adipokines. The present study considers the metabolic cross talk between skeletal muscle and adipose tissue in high-intensity interval training vs. moderate-intensity continuous training by regulation of PGC-1α. METHODS: A sample of 32 male Wistar rats (8 weeks old with mean weight 250 ± 55 g) were divided into four groups randomly: control of base (CO), control of 8 weeks (CO8w), moderate-intensity continuous training (MICT), and high-intensity interval training (HIIT)...
February 26, 2018: Eating and Weight Disorders: EWD
Nejmeddine Ouerghi, Mohamed Kacem Ben Fradj, Ikram Bezrati, Marwa Khammassi, Moncef Feki, Naziha Kaabachi, Anissa Bouassida
To examine the effects of short high-intensity interval training (HIIT) on body composition, physical performance and plasma lipids in overweight/obese compared to normal-weight young men. Nine overweight/obese and nine normal-weight men (control group) aged 17 to 20 years underwent a HIIT programme three times per week for eight weeks. Body composition, indices of aerobic [maximal aerobic velocity (MAV) and maximal oxygen uptake (VO2max )] and anaerobic [squat jump (SJ), counter-movement jump (CMJ), five-jump test (FJT), 10-m and 30-m sprint] performances, as well as fasting plasma lipids, were assessed in the two groups at PRE and POST HIIT...
December 2017: Biology of Sport
Raphael José Perrier-Melo, Fernando Augusto Marinho Dos Santos Figueira, Guilherme Veiga Guimarães, Manoel da Cunha Costa
Heart transplantation (HTx) is considered an efficient and gold-standard procedure for patients with end-stage heart failure. After surgery, patients have lower aerobic power (VO2max) and compensatory hemodynamic responses. The aim of the present study was to assess through a systematic review with meta-analysis whether high-intensity interval training (HIIT) can provide benefits for those parameters. This is a systematic review with meta-analysis, which searched the databases and data portals PubMed, Web of Science, Scopus, Science Direct and Wiley until December 2016 (pairs)...
February 19, 2018: Arquivos Brasileiros de Cardiologia
Pedro L Valenzuela, Guillermo Sánchez-Martínez, Elaia Torrentegi, Zigor Montalvo, Alejandro Lucia, Pedro de la Villa
PURPOSE: The use of enhanced external counter-pulsation (EECP) as a recovery strategy has increased in recent years owing to its benefits in the clinical setting. However, its claimed effectiveness for the enhancement of exercise recovery has not been analyzed in athletes. The aim of this study was to determine the effectiveness of EECP on short-term recovery after a fatiguing exercise bout. METHODS: 12 elite junior triathletes (16 ± 2 years) participated in this cross-over counterbalanced study...
February 21, 2018: International Journal of Sports Physiology and Performance
Charlotte B Ingul, Katrin A Dias, Arnt E Tjonna, Turid Follestad, Mansoureh S Hosseini, Anita S Timilsina, Siri M Hollekim-Strand, Torstein B Ro, Peter S W Davies, Peter A Cain, Gary M Leong, Jeff S Coombes
BACKGROUND: High intensity interval training (HIIT) confers superior cardiovascular health benefits to moderate intensity continuous training (MICT) in adults and may be efficacious for improving diminished cardiac function in obese children. The aim of this study was to compare the effects of HIIT, MICT and nutrition advice interventions on resting left ventricular (LV) peak systolic tissue velocity (S') in obese children. METHODS: Ninety-nine obese children were randomised into one of three 12-week interventions, 1) HIIT [n = 33, 4 × 4 min bouts at 85-95% maximum heart rate (HR max ), 3 times/week] and nutrition advice, 2) MICT [n = 32, 44 mins at 60-70% HR max , 3 times/week] and nutrition advice, and 3) nutrition advice only (nutrition) [n = 34]...
February 13, 2018: Progress in Cardiovascular Diseases
Sergio F Martinez-Huenchullan, Babu Raja Maharjan, Paul F Williams, Charmaine S Tam, Susan V Mclennan, Stephen M Twigg
Exercise regimens may have differing effects in the presence of obesity. In addition to being fat derived, adiponectin has recently been described as a myokine that regulates insulin sensitivity, which may link to exercise-related metabolic benefits in obesity. Whether skeletal muscle adiponectin varies in different exercise modalities is unclear. This study investigated the comparative effects of 10 weeks of endurance constant-moderate intensity exercise (END) with high intensity interval training (HIIT), on metabolic outcomes, including muscle adiponectin in a mouse model of diet-induced obesity...
February 2018: Physiological Reports
Martin J Gibala
The paper by Søgaard et al.1 in this issue of Acta Physiologica sheds new light on the potential for high-intensity interval training (HIIT) to improve insulin sensitivity and other indices of cardiometabolic health in older individuals. While interval training has been practiced by high-level athletes for more than a century, the last decade in particular has seen a resurgence of interest in the method as a means to enhance health in a wide range of individuals. Renewed scientific inquiry has been accompanied by increased attention from fitness enthusiasts, as evidenced by the fact that HIIT was again recently named the top fitness trend worldwide in an annual survey by the American College of Sports Medicine...
February 12, 2018: Acta Physiologica
Flávia Mariel Steckling, Juliano Boufleur Farinha, Felipe da Cunha Figueiredo, Daniela Lopes Dos Santos, Guilherme Bresciani, Nélson Alexandre Kretzmann, Sílvio Terra Stefanello, Aline Alves Courtes, Maristela de Oliveira Beck, Manuela Sangoi Cardoso, Marta Maria Medeiros Frescura Duarte, Rafael Noal Moresco, Félix Alexandre Antunes Soares
This study investigate the effects of high-intensity interval training (HIIT) on systemic levels of inflammatory and hormonal markers in postmenopausal women with metabolic syndrome (MS). Fifteen postmenopausal women with MS completed the training on treadmills. Functional, body composition parameters, maximal oxygen uptake (VO 2 max), and lipid profile were assessed before and after HIIT. Serum or plasma levels of cytokines and hormonal markers were measured along the intervention. The analysis of messenger RNA (mRNA) expression of these cytokines was performed in peripheral blood mononuclear cells (PBMC)...
February 12, 2018: Archives of Physiology and Biochemistry
María Angélica Olea, Rodrigo Mancilla, Sergio Martínez, Erik Díaz
BACKGROUND: Exercise training may reduce blood pressure. AIM: To determine the effects of a high intensity interval training (HIIT) exercise protocol on systolic and diastolic blood pressure in hypertensive subjects. MATERIAL AND METHODS: Eleven men and 27 women aged 46.4 ± 9.8 years were divided in two groups according to their blood pressure. Sixteen were classified as normotensive and 22 as hypertensive. All attended an exercise program with 3 sessions per week for a total of 24 sessions...
September 2017: Revista Médica de Chile
Keith Tolfrey, Julia Kirstey Zakrzewski-Fruer, Alice Emily Thackray
Two publications were selected because they are excellent representations of studies examining different ends of the exercise-sedentary behavior continuum in young people. The first study is an acute response study with 13 mixed-sex, mid to late adolescents presenting complete data from 4 different randomized experimental crossover conditions for analyses. Continuous glucose monitoring showed that interrupting prolonged continuous sitting with body-weight resistance exercises reduced the postprandial glucose concentration compared with a time-matched uninterrupted period of sitting...
February 9, 2018: Pediatric Exercise Science
Amanda L Hannan, Wayne Hing, Vini Simas, Mike Climstein, Jeff S Coombes, Rohan Jayasinghe, Joshua Byrnes, James Furness
Background: Aerobic capacity has been shown to be inversely proportionate to cardiovascular mortality and morbidity and there is growing evidence that high-intensity interval training (HIIT) appears to be more effective than moderate-intensity continuous training (MICT) in improving cardiorespiratory fitness within the cardiac population. Previously published systematic reviews in cardiovascular disease have neither investigated the effect that the number of weeks of intervention has on cardiorespiratory fitness changes, nor have adverse events been collated...
2018: Open Access Journal of Sports Medicine
Sean Francis Nugent, Mary E Jung, Jessica E Bourne, Jason Loeppky, Abigail Arnold, Jonathan P Little
High intensity interval training (HIIT) elicits health benefits but it is unclear how HIIT impacts sedentary behaviour. In this preliminary study, we compared the effects of supervised HIIT or moderate intensity continuous training (MICT) on sedentary time in overweight/obese adults. In both groups, percentage of time spent in sedentary activities was significantly reduced during the supervised exercise intervention (time main effect, p = .03) suggesting that both HIIT and MICT replaced time spent previously being sedentary...
February 7, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
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