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Interval training HIIT

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https://www.readbyqxmd.com/read/28633487/high-intensity-interval-training-hiit-improves-physical-performance-and-frailty-in-aged-mice
#1
Kenneth Ladd Seldeen, Ginger Lasky, Merced Maria Leiker, Manhui Pang, Kirkwood Ely Personius, Bruce Robert Troen
Sarcopenia and frailty are highly prevalent in older individuals, increasing the risk of disability and loss of independence. High intensity interval training (HIIT) may provide a robust intervention for both sarcopenia and frailty by achieving both strength and endurance benefits with lower time commitments than other exercise regimens. To better understand the impacts of HIIT during aging, we compared 24-month-old C57BL/6J sedentary mice with those that were administered 10-minute uphill treadmill HIIT sessions three times per week over 16 weeks...
June 17, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28633001/impact-of-4-weeks-of-interval-training-on-resting-metabolic-rate-fitness-and-health-related-outcomes
#2
Matthew M Schubert, Holly E Clarke, Rebekah F Seay, Katie K Spain
PURPOSE: Resting metabolic rate (RMR) and substrate oxidation (RER) are important indicators of health. The effects of interval training on RMR have not been thoroughly investigated, which was the purpose of the present study. METHODS: Thirty men and women (mean ± SD age and VO2max: 28.8 ± 7.6 yrs and 33.0 ± 8.3 mL∙kg-1∙min-1) completed 4 weeks of Wingate-based sprint interval training (SIT), repeated 1-minute high-intensity intervals (HIIT), or served as controls (CON)...
June 20, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28630575/acute-and-post-exercise-physiological-responses-to-high-intensity-interval-training-in-endurance-and-sprint-athletes
#3
Lukas Cipryan, Gerhard Tschakert, Peter Hofmann
The purpose of the presented study was to compare acute and post-exercise differences in cardiorespiratory, metabolic, cardiac autonomic, inflammatory and muscle damage responses to high-intensity interval exercise (HIIT) between endurance and sprint athletes. The study group consisted of sixteen highly-trained males (age 22.1 ± 2.5 years) participating in endurance (n = 8) or sprint (n = 8) sporting events. All the participants underwent three exercise sessions: short HIIT (work interval duration 30s), long HIIT (3min) and constant load exercise (CE)...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28628064/exercise-training-reduces-intrathoracic-fat-regardless-of-defective-glucose-tolerance
#4
Sanna M Honkala, Kumail K Motiani, Jari-Joonas Eskelinen, Anna Savolainen, Virva Saunavaara, Kirsi A Virtanen, Eliisa Löyttyniemi, Jukka Kapanen, Juhani Knuuti, Kari K Kalliokoski, Jarna C Hannukainen
PURPOSE: Epicardial (EAT) and pericardial (PAT) fat masses and myocardial triglyceride content (MTC) are enlarged in obesity and insulin resistance. We studied whether the high-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) similarly decrease ectopic fat in and around the heart and whether the decrease is similar in healthy subjects and subjects with defective glucose tolerance (DGT). METHODS: A total of 28 healthy men (body mass index = 20...
July 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28620311/physiological-adaptations-to-hypoxic-vs-normoxic-training-during-intermittent-living-high
#5
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/28611681/dose-response-of-high-intensity-training-hit-on-atheroprotective-mirna-126-levels
#6
Boris Schmitz, Katrin Schelleckes, Johanna Nedele, Lothar Thorwesten, Andreas Klose, Malte Lenders, Michael Krüger, Eva Brand, Stefan-Martin Brand
Aim: MicroRNA-126 (miR-126) exerts beneficial effects on vascular integrity, angiogenesis, and atherosclerotic plaque stability. The purpose of this investigation was to analyze the dose-response relationship of high-intensity interval training (HIIT) on miR-126-3p and -5p levels. Methods: Sixty-one moderately trained individuals (females = 31 [50.8%]; 22.0 ± 1.84 years) were consecutively recruited and allocated into three matched groups using exercise capacity. During a 4-week intervention a HIIT group performed three exercise sessions/week of 4 × 30 s at maximum speed (all-out), a progressive HIIT (proHIIT) group performed three exercise sessions/week of 4 × 30 s at maximum speed (all-out) with one extra session every week (up to 7 × 30 s) and a low-intensity training (LIT) control group performed three exercise sessions/week for 25 min <75% of maximum heart rate...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28588097/high-intensity-interval-training-and-calorie-restriction-promote-remodeling-of-glucose-and-lipid-metabolism-in-diet-induced-obesity
#7
Rachel A H Davis, Jacob E Halbrooks, Emily Watkins, Gordon Fisher, Gary R Hunter, Tim R Nagy, Eric P Plaisance
Calorie restriction (CR) decreases adiposity, but the magnitude and defense of weight loss is less than predicted due to reductions in total daily energy expenditure (TEE). The purpose of the current investigation was to determine if high-intensity interval training (HIIT) would increase markers of sympathetic activation in white adipose tissue (WAT) and rescue CR-mediated reductions in EE to a greater extent than moderate-intensity aerobic exercise training (MIT). Thirty-two 5-wk old male C57BL/6J mice were placed on ad libitum HFD for 11 weeks followed by randomization to one of four groups (n = 8 per group) for an additional 15 weeks: 1) CON (remain on HFD); 2) CR (25% lower energy intake); 3) CR+HIIT (25% energy deficit created by 12...
June 6, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28570494/endurance-running-training-individually-guided-by-hrv-in-untrained-women
#8
Danilo F da Silva, Zachary M Ferraro, Kristi B Adamo, Fabiana A Machado
The aim of this study was to analyze the effects of HRV-guided training compared to a standardized prescription on i) time to complete 5-km running performance (t5km), ii) peak treadmill running speed (Vpeak) and its time limit (tlim at Vpeak), and iii) autonomic cardiac modulation (i.e., parasympathetic activity and recovery) in untrained women. Additionally, we correlated changes in t5km with changes in Vpeak, tlim at Vpeak and autonomic cardiac modulation. Thirty-six untrained women were divided into a HRV-guided training group (HRVG) and a control group (CG)...
May 30, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28570491/effects-of-a-6-week-upper-extremity-low-volume-high-intensity-interval-training-on-oxygen-uptake-peak-power-output-and-total-exercise-time
#9
Nicole Pinto, James W Salassi, Ayla Donlin, Jan Schroeder, Ralph Rozenek
The purpose of this study was to compare the effects of upper extremity (UE) high intensity interval training (HIIT) to UE continuous training (CT) when training at a similar intensity. 20 participants (mean age = 23 ± 3 yrs) were randomly assigned to either a HIIT (n = 10) or CT (n = 10) group. Participants completed a graded exercise test utilizing arm cranking prior to and following 6 wks (2 sessions · wk-1) of UE training. During sessions, HIIT performed 10 repetitions of 60 s of work at 92.3 ± 1.0% of the arm HRpeak (%aHRpeak) and 60 s of passive recovery (%aHRpeak = 73...
May 30, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28567669/cerebral-oxygenation-during-cortical-activation-the-differential-influence-of-three-exercise-training-modalities-a-randomized-controlled-trial
#10
Carla Coetsee, Elmarie Terblanche
PURPOSE: To determine if a cerebral oxygenation response during cortical activation is influenced by exercise training mode. METHODS: Sixty-seven individuals (55-75 years old) volunteered for this 16-week intervention study. Participants were randomized into a resistance training (RT) group (n = 22), high-intensity interval training (HIIT) group (n = 13), moderate continuous training (MCT) group (n = 13) and a control (CON) group (n = 19). Near-infrared spectroscopy was used to measure cerebral oxygenation during the Stroop task...
May 31, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28567668/the-impact-of-acute-high-intensity-interval-exercise-on-biomarkers-of-cardiovascular-health-in-type-2-diabetes
#11
Monique E Francois, Jonathan P Little
PURPOSE: High-intensity interval training (HIIT) interventions improve cardiovascular health, yet the acute effects on circulating and functional biomarkers of cardiovascular function are unclear in individuals with type 2 diabetes (T2D). To explore this, we conducted two investigations to examine the acute response to HIIT in individuals with T2D. METHODS: Study 1 measured blood pressure, endothelial-dependent dilation, circulating measures of endothelial activation, and troponin T, 30 min and 2 h after HIIT (7 × 1-min intervals) in T2D (n = 8) and age-matched normoglycemic controls (CTL; n = 8)...
May 31, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28560751/differential-control-of-respiratory-frequency-and-tidal-volume-during-high-intensity-interval-training
#12
Andrea Nicolò, Samuele M Marcora, Ilenia Bazzucchi, Massimo Sacchetti
Since respiratory frequency (fR ) has been proposed as a good marker of physical effort, furthering the understanding of how fR is regulated during exercise is of great importance. We manipulated recovery intensity and exercise duration during high-intensity interval training (HIIT) to test the hypothesis that fast inputs (including central command) contribute more than metabolic stimuli to fR regulation. Seven male cyclists performed an incremental test, a 10 min and a 20 min continuous time trial (TT) as preliminary tests...
May 31, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28515052/exercise-training-improves-free-testosterone-in-lifelong-sedentary-aging-men
#13
Lawrence Hayes, Peter Herbert, Nicholas Sculthorpe, Fergal Grace
As the impact of high intensity interval training (HIIT) on systemic hormones in aging men is unstudied to date, we investigated whether total testosterone (TT), sex hormone binding globulin (SHBG), free testosterone (free-T), and cortisol (all in serum) were altered following HIIT in a cohort of 22 lifelong sedentary (62 ± 2 years) older men. As HIIT requires preconditioning exercise in sedentary cohorts, participants were tested at three phases, each separated by six weeks' training; baseline (phase A), following conditioning exercise (phase B), and post-HIIT (phase C)...
May 17, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/28513103/a-systematic-review-and-meta-analysis-of-interval-training-versus-moderate-intensity-continuous-training-on-body-adiposity
#14
REVIEW
S E Keating, N A Johnson, G I Mielke, J S Coombes
Interval training (including high-intensity interval training [HIIT] and sprint interval training [SIT]) is promoted in both scientific and lay media as being a superior and time-efficient method for fat loss compared with traditional moderate-intensity continuous training (MICT). We evaluated the efficacy of HIIT/SIT when directly compared with MICT for the modulation of body adiposity. Databases were searched to 31 August 2016 for studies with exercise training interventions with minimum 4-week duration. Meta-analyses were conducted for within-group and between-group comparisons for total body fat percentage (%) and fat mass (kg)...
May 17, 2017: Obesity Reviews: An Official Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28511954/high-intensity-interval-training-hiit-improves-resting-blood-pressure-metabolic-met-capacity-and-heart-rate-reserve-without-compromising-cardiac-function-in-sedentary-aging-men
#15
Fergal Grace, Peter Herbert, Adrian D Elliott, Jo Richards, Alexander Beaumont, Nicholas F Sculthorpe
BACKGROUND: This study examined a programme of pre-conditioning exercise with subsequent high intensity interval training (HIIT) on blood pressure, echocardiography, cardiac strain mechanics and maximal metabolic (MET) capacity in sedentary (SED) aging men compared with age matched masters athletes (LEX). METHODS: Using a STROBE compliant observational design, 39 aging male participants (SED; n=22, aged 62.7±5.2yrs) (LEX; n=17, aged=61.1±5.4yrs) were recruited to a study that necessitated three distinct assessment phases; enrolment (Phase A), following pre-conditioning exercise in SED (Phase B), then following 6weeks of HIIT performed once every five days by both groups before reassessment (Phase C)...
May 13, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28495843/treating-fructose-induced-metabolic-changes-in-mice-with-high-intensity-interval-training-insights-in-the-liver-white-adipose-tissue-and-skeletal-muscle
#16
Victor Faria Motta, Thereza Lonzetti Bargut, Marcia Barbosa Aguila, Carlos Alberto Mandarim-de-Lacerda
Fructose-rich caloric sweeteners induce adverse changes in the population metabolism. The study evaluated the effects of high-intensity interval training (HIIT) on a fructose feeding model, focusing on the liver, white adipose tissue (WAT), skeletal muscle, and their interplay. Male C57BL/6 mice were fed for 18 weeks one of the following diets: control (C; 5 % of total energy from fructose), or fructose (F; 55 % of total energy from fructose). In the 10th week, for an additional eight-week period the groups were divided into non-trained (NT) or HIIT groups, totaling four groups: C-NT, C-HIIT, F-NT, and F-HIIT...
May 11, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28493030/ambulatory-blood-pressure-response-to-a-bout-of-hiit-in-metabolic-syndrome-patients
#17
M Ramirez-Jimenez, F Morales-Palomo, J G Pallares, Ricardo Mora-Rodriguez, J F Ortega
PURPOSE: The effectiveness of exercise to lower blood pressure may depend on the type and intensity of exercise. We study the short-term (i.e., 14-h) effects of a bout of high-intensity aerobic interval training (HIIT) on blood pressure in metabolic syndrome (MetS) patients. METHODS: Nineteen MetS patients (55.2 ± 7.3 years, 6 women) entered the study. Eight of them were normotensive and eleven hypertensive according to MetS threshold (≥130 mmHg for SBP and/or ≥85 mmHg for DBP)...
May 10, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28488826/soccer-training-high-intensity-interval-training-is-mood-disturbing-while-small-sided-games-ensure-mood-balance
#18
Okba Selmi, Monoem Haddad, Lina Majed, Wissam Ben Khalifa, Marzougui Hamza, Karim Chamari
BACKGROUNDː The aim of the study was to compare the effects of high-intensity intermittent training (HIIT) versus small-sided games (SSG) in soccer on both the physiological responses and the mood state of players. METHODS: Sixteen professional soccer players took part in the study (age: 24.1±0.9 years). Testing of players was conducted on separate days in a randomized and counter-balanced order (each training session: 28-min: 4x4 minutes work with 3-min of passive recovery in-between)...
May 9, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28488137/acute-effects-of-high-intensity-interval-training-and-moderate-intensity-continuous-training-sessions-on-cardiorespiratory-parameters-in-healthy-young-men
#19
Gustavo Zaccaria Schaun, Cristine Lima Alberton, Diego Oliveira Ribeiro, Stephanie Santana Pinto
PURPOSE: The aim of the present study was to compare the energy expenditure (EE) during and after two treadmill protocols, high-intensity interval training (HIIT) and moderate continuous training (CONT), in young adult men. METHODS: The sample was comprised by 26 physically active men aged between 18 and 35 years engaged in aerobic training programs. They were divided into two groups: HIIT (n = 14) which performed eight 20 s bouts at 130% of the velocity associated with the maximal oxygen consumption on a treadmill with 10 s of passive rest, or CONT (n = 12) which performed 30 min running on a treadmill at a submaximal velocity equivalent to 90-95% of the heart rate associated with the anaerobic threshold...
May 9, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28482759/caffeine-prevents-high-intensity-exercise-induced-increase-in-enzymatic-antioxidant-and-na-k-atpase-activities-and-reduction-of-anxiolytic-like-behaviour-in-rats
#20
Juliano M Vieira, Fabiano B Carvalho, Jessié M Gutierres, Mayara S P Soares, Pathise S Oliveira, Maribel A Rubin, Vera M Morsch, Maria Rosa Schetinger, Roselia M Spanevello
OBJECTIVE: Here we investigated the impact of chronic high-intensity interval training (HIIT) and caffeine consumption on the activities of Na(+)-K(+)-ATPase and enzymes of the antioxidant system, as well as anxiolytic-like behaviour in the rat brain. METHODS: Animals were divided into groups: control, caffeine (4 mg/kg), caffeine (8 mg/kg), HIIT, HIIT plus caffeine (4 mg/kg) and HIIT plus caffeine (8 mg/kg). Rats were trained three times per week for 6 weeks, and caffeine was administered 30 minutes before training...
May 8, 2017: Redox Report: Communications in Free Radical Research
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