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https://www.readbyqxmd.com/read/28319586/short-term-exercise-training-alters-leukocyte-chemokine-receptors-in-obese-adults
#1
Julianne C Barry, Svetlana Simtchouk, Cody Durrer, Mary E Jung, Jonathan P Little
Obesity is characterized by chronic low-grade inflammation driven by activation and tissue infiltration of circulating leukocytes. Although exercise has anti-inflammatory effects, the impact of exercise on mediators of leukocyte migration is unclear. PURPOSE: To determine the impact of high intensity interval training (HIIT) versus moderate intensity continuous training (MICT), in the absence of weight/fat loss, on circulating chemokines and leukocyte chemokine receptors. METHODS: Thirty-seven inactive obese adults were randomized to two weeks (10 sessions) of HIIT or MICT with fasting blood samples collected before and after training...
March 18, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28318098/decreased-insulin-stimulated-brown-adipose-tissue-glucose-uptake-after-short-term-exercise-training-in-healthy-middle-aged-men
#2
Piryanka Motiani, Kirsi A Virtanen, Kumail K Motiani, Joonas J Eskelinen, Roeland J Middelbeek, Laurie J Goodyear, Anna M Savolainen, Jukka Kemppainen, Jørgen Jensen, Mueez U Din, Virva Saunavaara, Riitta Parkkola, Eliisa Löyttyniemi, Juhani Knuuti, Pirjo Nuutila, Kari K Kalliokoski, Jarna C Hannukainen
AIMS: Little is known about the effects of exercise training on brown adipose tissue (BAT) metabolism in humans. We tested the hypothesis that high-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) improve BAT insulin sensitivity. MATERIALS AND METHODS: Healthy middle-aged men (n = 18, age 47 [CI: 49, 43] years, BMI 25.3 [CI: 24.1-26.3] kg · m(-2) , VO2peak 34.8[CI: 32.1, 37.4] ml · kg(-1)  · min(-1) ) were recruited and randomized into six HIIT or MICT sessions within two weeks...
March 20, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28303003/effects-of-high-intensity-interval-training-and-moderate-intensity-continuous-training-on-glycaemic-control-and-skeletal-muscle-mitochondrial-function-in-db-db-mice
#3
Vivien Chavanelle, Nathalie Boisseau, Yolanda F Otero, Lydie Combaret, Dominique Dardevet, Christophe Montaurier, Geoffrey Delcros, Sébastien L Peltier, Pascal Sirvent
Physical activity is known as an effective strategy for prevention and treatment of Type 2 Diabetes. The aim of this work was to compare the effects of a traditional Moderate Intensity Continuous Training (MICT) with a High Intensity Interval Training (HIIT) on glucose metabolism and mitochondrial function in diabetic mice. Diabetic db/db male mice (N = 25) aged 6 weeks were subdivided into MICT, HIIT or control (CON) group. Animals in the training groups ran on a treadmill 5 days/week during 10 weeks...
March 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28301438/effects-of-12-week-concurrent-high-intensity-interval-strength-and-endurance-training-programme-on-physical-performance-in-healthy-older-people
#4
Felipe García-Pinillos, José A Laredo-Aguilera, Marcos Muñoz-Jiménez, Pedro A Latorre-Román
This study aimed to analyse the effect of 12-week low-volume HIIT-based concurrent training programme on body composition, upper- and lower-body muscle strength, mobility and balance in older adults, as well as to compare it with a low- moderate-intensity continuous training. 90 active older adults were randomly assigned to experimental (EG, n=47), and control (CG, n=43) groups. Body composition and physical functioning were assessed before (pre-test) and after (post-test) a 12-week intervention. A 2-way repeated measures ANOVA was used to test for an interaction between training programme and groups...
March 13, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28294700/food-intake-and-appetite-following-school-based-high-intensity-interval-training-in-9-11-year-old-children
#5
Anna Morris, Robert Cramb, Caroline J Dodd-Reynolds
Using a randomised cross-over design, free-living lunch intake and subjective appetite were examined in 10 children (9.8 ± 0.6 years) following high-intensity interval training (HIIT) versus a control sedentary (SED) period, within a school setting. The 22-min HIIT took place during a regular PE lesson and consisted of two rounds of 4 × 30 s sprints. Foods were offered at a regular school lunch immediately following HIIT and SED and were matched between conditions. All food was covertly weighed before and after the meal...
March 15, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28277422/neuromuscular-adaptations-to-short-term-high-intensity-interval-training-in-female-ice-hockey-players
#6
Juho-Ville Kinnunen, Harri Piitulainen, Jarmo M Piirainen
High-intensity interval training (HIIT) related neuromuscular adaptations, changes in force production and on-ice performance were investigated in female ice-hockey players during pre-season. Fourteen Finnish championship level ice hockey players (average age 22 ± 3 years) participated in 2½-week HIIT. Both spinal (H-reflex) and supraspinal (V-wave) neuromuscular responses of the soleus muscle were recorded before and after the training period. Static jump (SJ) and countermovement jump (CMJ) heights, plantar flexor maximal voluntary contraction (MVC) and rate of force development (RFD) were measured...
March 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28277015/effects-of-high-intensity-interval-training-on-cardiometabolic-risk-in-overweight-and-obese-african-american-women-a-pilot-study
#7
Lyndsey M Hornbuckle, Michael J McKenzie, Melicia C Whitt-Glover
OBJECTIVE: Little is known about high-intensity interval training (HIIT) in African-American (AA) women. The purpose of this pilot study was to evaluate the effects of HIIT and steady-state (SS) exercise on cardiometabolic risk factors in young AA women. DESIGN: A 16-week exercise intervention was conducted 3x/week. Twenty-seven AA women were randomized to SS (n = 11; 32 continuous minutes of treadmill walking at 60-70% of maximum heart rate (HRmax)), or HIIT (n = 16; 32 min of treadmill HIIT alternating 3 min at 60-70% of HRmax with 1 min at 80-90% of HRmax)...
March 1, 2017: Ethnicity & Health
https://www.readbyqxmd.com/read/28276612/a-gut-reaction-the-combined-influence-of-exercise-and-diet-on-gastrointestinal-microbiota-in-rats
#8
Romeo Batacan, Andrew Fenning, Vincent J Dalbo, Aaron T Scanlan, Mitch J Duncan, Robert J Moore, Dragana Stanley
AIMS: Intestinal microbiota modulates the development of clinical conditions, including metabolic syndrome and obesity. Many of these conditions are influenced by nutritional and exercise behaviours. This study aimed to investigate the ability of exercise to re-shape the intestinal microbiota and the influence of the diet on the process. METHODS AND RESULTS: A rat model was used to examine the intestinal microbiota responses to four activity conditions, including: high intensity interval training, light intensity training, sedentary and normal control, each containing two nutritional conditions: high-fat high-fructose diet (HF) and standard chow (SC) diet...
March 9, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28273480/enhanced-protein-translation-underlies-improved-metabolic-and-physical-adaptations-to-different-exercise-training-modes-in-young-and-old-humans
#9
Matthew M Robinson, Surendra Dasari, Adam R Konopka, Matthew L Johnson, S Manjunatha, Raul Ruiz Esponda, Rickey E Carter, Ian R Lanza, K Sreekumaran Nair
The molecular transducers of benefits from different exercise modalities remain incompletely defined. Here we report that 12 weeks of high-intensity aerobic interval (HIIT), resistance (RT), and combined exercise training enhanced insulin sensitivity and lean mass, but only HIIT and combined training improved aerobic capacity and skeletal muscle mitochondrial respiration. HIIT revealed a more robust increase in gene transcripts than other exercise modalities, particularly in older adults, although little overlap with corresponding individual protein abundance was noted...
March 7, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28251399/change-in-maximal-fat-oxidation-in-response-to-different-regimes-of-periodized-high-intensity-interval-training-hiit
#10
Todd A Astorino, Ross M Edmunds, Amy Clark, Rachael Gallant, Leesa King, Gina M Ordille, Brendyn Heath, Matthew Montell, Jason Bandong
PURPOSE: Increased capacity for fat oxidation (FatOx) is demonstrated in response to chronic endurance training as well as high-intensity interval training (HIIT). This study examined changes in maximal fat oxidation (MFO) in response to 20 sessions of periodized HIIT in an attempt to identify if various regimes of HIIT similarly augment capacity for FatOx. METHODS: Thirty-nine habitually active men and women (mean age and VO2max = 22.5 ± 4.4 year and 40...
March 1, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28247026/one-night-of-partial-sleep-deprivation-impairs-recovery-from-a-single-exercise-training-session
#11
Dale E Rae, Tayla Chin, Kagiso Dikgomo, Lee Hill, Andrew J McKune, Tertius A Kohn, Laura C Roden
PURPOSE: The effects of sleep deprivation on physical performance are well documented, but data on the consequence of sleep deprivation on recovery from exercise are limited. The aim was to compare cyclists' recovery from a single bout of high-intensity interval training (HIIT) after which they were given either a normal night of sleep (CON, 7.56 ± 0.63 h) or half of their usual time in bed (DEP, 3.83 ± 0.33 h). METHODS: In this randomized cross-over intervention study, 16 trained male cyclists (age 32 ± 7 years), relative peak power output (PPO 4...
February 28, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28222393/caffeine-prevents-changes-in-muscle-caused-by-high-intensity-interval-training
#12
Juliano M Vieira, Jessié M Gutierres, Fabiano B Carvalho, Luciane B Pereira, Liziele S Oliveira, Vera Maria Morsch, Maria Rosa C Schetinger, Marília V Rodrigues, Jossiele Leitemperger, Vânia Loro, Cristina C Krewer, Marina S Vencato, Roselia M Spanevello
The use of ergogenic substances such as caffeine has become a strategy to enhance sports performance. In the present study we evaluated the effects of high-intensity interval training (HIIT) associated with caffeine intake on acetylcholinesterase (AChE) and Ca(2+)ATPase activity and glycogen levels in the muscles of rats were evaluated. The animals were divided in groups: control, caffeine 4 or 8mg/kg, HIIT, HIIT plus caffeine 4 or caffeine 8mg/kg. Our results showed a decrease in glycogen levels in muscle in all trained groups after acute session exercise, while that an increase in glycogen levels was observed in all groups in relation to control in chronic exercise protocol...
February 17, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28219103/digoxin-induces-cardiac-hypertrophy-without-negative-effects-on-cardiac-function-and-physical-performance-in-trained-normotensive-rats
#13
Claodete Hasselstrom Neves, Ramires Alsamir Tibana, Jonato Prestes, Fabricio Azevedo Voltarelli, Andreo Fernando Aguiar, Gustavo Augusto Ferreira Mota, Sergio Luiz Borges de Sousa, Andre Soares Leopoldo, Ana Paula Lima Leopoldo, Andre Mueller, Danilo Henrique Aguiar, James Wilfred Navalta, Mario Mateus Sugizaki
Cardiotonic drugs and exercise training promote cardiac inotropic effects, which may affect training-induced cardiac adaptations. This study investigated the effects of long-term administration of digoxin on heart structure and function, and physical performance of rats submitted to high-intensity interval training (HIIT). Male Wistar rats, 60 days old, were divided into control (C), digoxin (DIGO), trained (T), and trained with digoxin (TDIGO). Digoxin was administered by gavage (30 µg/kg/day) for 75 days...
February 20, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28216412/sex-impacts-the-flow-mediated-dilation-response-to-acute-aerobic-exercise-in-older-adults
#14
Jeung-Ki Yoo, Michelle M Pinto, Han-Kyul Kim, Chueh-Lung Hwang, Jisok Lim, Eileen M Handberg, Demetra D Christou
There is growing evidence of sex differences in the chronic effect of aerobic exercise on endothelial function (flow-mediated dilation; FMD) in older adults, but whether there are sex differences also in the acute effect of aerobic exercise on FMD in older adults is unknown. The purpose of this study was to test the hypothesis that sex modulates the FMD response to acute aerobic exercise in older adults. Thirteen older men and fifteen postmenopausal women (67±1 vs. 65±2years, means±SE, P=0.6), non-smokers, free of major clinical disease, participated in this randomized crossover study...
February 16, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28207951/endurance-capacity-and-neuromuscular-fatigue-following-high-vs-moderate-intensity-endurance-training-a-randomised-trial
#15
Thomas J O'Leary, Johnny Collett, Ken Howells, Martyn G Morris
High-intensity exercise induces significant central and peripheral fatigue, however the effect of endurance training on these mechanisms of fatigue is poorly understood. We compared the effect of cycling endurance training of disparate intensities on high-intensity exercise endurance capacity and the associated limiting central and peripheral fatigue mechanisms. Twenty adults were randomly assigned to 6 weeks of either high-intensity interval training (HIIT, 6-8 × 5 min at halfway between lactate threshold and maximal oxygen uptake [50%Δ]) or volume matched moderate-intensity continuous training (CONT, ~60-80 min at 90% lactate threshold)...
February 16, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28195979/effects-of-high-intensity-interval-training-with-different-interval-durations-on-physical-performance-in-handball-players
#16
Jorge Viaño-Santasmarinas, Ezequiel Rey, Sergio Carballeira, Alexis Padrón-Cabo
The purpose of this study was to compare the effects of 2 high-intensity interval training protocols (HIIT) with different interval durations (short (SI) vs long (LI)), based on peak running velocity in 30-15 Intermittent Fitness Test (VIFT) in handball players. Eighteen highly trained players (age: 22.7±3.9 years; height: 181.5±6.6 cm; body mass: 84.7±14.1 kg) were randomly assigned to SI (2 sets of 22 intervals of 10-s runs at 95%VIFT) or LI (5 sets of 3 min intervals at 85% VIFT) group. The intervention program had to be carried out 2 times a week over 6 weeks...
February 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28188854/the-effects-of-a-single-bout-of-exercise-on-motor-memory-interference-in-the-trained-and-untrained-hemisphere
#17
Benedikt Lauber, Steffen Franke, Wolfgang Taube, Albert Gollhofer
Increasing evidence suggests that cardiovascular exercise has positive effects on motor memory consolidation. In this study, we investigated whether a single session of high-intensity interval training (HIIT) mitigates the effects of practicing an interfering motor task. Furthermore, learning and interference effects were assessed in the actively trained and untrained limb as it is known that unilateral motor learning can cause bilateral adaptations. Subjects performed a ballistic training and then the HIIT either before (HIIT_before) or after (HIIT_after) practicing an interfering accuracy task (AT)...
April 7, 2017: Neuroscience
https://www.readbyqxmd.com/read/28183816/two-weeks-of-moderate-intensity-continuous-training-but-not-high-intensity-interval-training-increases-insulin-stimulated-intestinal-glucose-uptake
#18
Kumail Kumar Motiani, Anna M Savolainen, Jari-Joonas Eskelinen, Jussi Toivanen, Tamiko Ishizu, Minna Yli-Karjanmaa, Kirsi A Virtanen, Riitta Parkkola, Jukka Kapanen, Tove J Gronroos, Merja Haaparanta-Solin, Olof Solin, Nina Savisto, Markku Ahotupa, Eliisa Löyttyniemi, Juhani Knuuti, Pirjo Nuutila, Kari K Kalliokoski, Jarna C Hannukainen
Similar to muscles, the intestine is also insulin resistant in obese subjects and subjects with impaired glucose tolerance. Exercise training improves muscle insulin sensitivity, but its effects on intestinal metabolism are not known. We studied the effects of high intensity interval training (HIIT) and moderate intensity continuous training (MICT) on intestinal glucose and free fatty acid uptake from circulation in humans. Twenty-eight healthy middle-aged sedentary men were randomized for two weeks of HIIT or MICT...
February 9, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28183455/cardiometabolic-risk-markers-adipocyte-fatty-acid-binding-protein-afabp-and-the-impact-of-high-intensity-interval-training-hiit-in-obese-adolescents
#19
Susann Blüher, Jakob Käpplinger, Sabine Herget, Sandra Reichardt, Yvonne Böttcher, Andrea Grimm, Jürgen Kratzsch, David Petroff
OBJECTIVE: The impact of high-intensity interval training (HIIT) as well as the association between the adipocyte fatty binding protein (aFABP) and cardiometabolic risk factors in overweight adolescents was investigated. METHODS: Twenty-eight adolescents (13-18years; BMI≥90th percentile according to German reference values) were offered HIIT twice weekly for 6months. At baseline and after program completion, anthropometric, clinical and metabolic characteristics were assessed and a fasting blood sample was obtained...
March 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28178145/one-session-of-high-intensity-interval-training-hiit-every-5-days-improves-muscle-power-but-not-static-balance-in-lifelong-sedentary-ageing-men-a-randomized-controlled-trial
#20
RANDOMIZED CONTROLLED TRIAL
Nicholas F Sculthorpe, Peter Herbert, Fergal Grace
BACKGROUND: Declining muscle power during advancing age predicts falls and loss of independence. High-intensity interval training (HIIT) may improve muscle power, but remains largely unstudied in ageing participants. METHODS: This randomized controlled trial (RCT) investigated the efficacy of a low-frequency HIIT (LfHIIT) intervention on peak muscle power (peak power output [PPO]), body composition, and balance in lifelong sedentary but otherwise healthy males. METHODS: Thirty-three lifelong sedentary ageing men were randomly assigned to either intervention (INT; n = 22, age 62...
February 2017: Medicine (Baltimore)
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