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Intermittent training

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https://www.readbyqxmd.com/read/28213155/high-frequency-stimulation-of-afferent-fibers-generates-asynchronous-firing-in-the-downstream-neurons-in-hippocampus-through-partial-block-of-axonal-conduction
#1
Zhouyan Feng, Zhaoxiang Wang, Zheshan Guo, Wenjie Zhou, Ziyan Cai, Dominique M Durand
Deep brain stimulation (DBS) is effective for treating neurological disorders in clinic. However, the therapeutic mechanisms of high-frequency stimulation (HFS) of DBS have not yet been elucidated. Previous studies have suggested that HFS-induced changes in axon conduction could have important contributions to the DBS effects and desiderate further studies. To investigate the effects of prolonged HFS of afferent axons on the firing of downstream neurons, HFS trains of 100 and 200 Hz were applied on the Schaffer collaterals of the hippocampal CA1 region in anaesthetized rats...
February 14, 2017: Brain Research
https://www.readbyqxmd.com/read/28199402/short-or-long-rest-intervals-during-repeated-sprint-training-in-soccer
#2
F Marcello Iaia, Matteo Fiorenza, Luca Larghi, Giampietro Alberti, Grégoire P Millet, Olivier Girard
The present study compared the effects of two repeated-sprint training (RST) programs, differing in duration of the between-sprint rest intervals, on various soccer-related exercise performances. For 5 weeks during the competitive season, twenty-nine young trained male soccer players either replaced two of their habitual fitness conditioning sessions with RST characterized by short (5-15; n = 9) or long (5-30; n = 10) rest intervals, or served as control (n = 10). The 5-15 and 5-30 protocols consisted of 6 repetitions of 30-m (~5 s) straight-line sprints interspersed with 15 s or 30 s of passive recovery, respectively...
2017: PloS One
https://www.readbyqxmd.com/read/28195979/effects-of-high-intensity-interval-training-with-different-interval-durations-on-physical-performance-in-handball-players
#3
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/28194734/physical-and-physiological-profiles-of-brazilian-jiu-jitsu-athletes-a-systematic-review
#4
REVIEW
Leonardo Vidal Andreato, Francisco Javier Díaz Lara, Alexandro Andrade, Braulio Henrique Magnani Branco
BACKGROUND: Brazilian jiu-jitsu is a grappling combat sport that has intermittency as its core element; in other words, actions of high, moderate and low intensity are interspersed during matches, requiring a high level of conditioning to support optimal levels of performance for the total match time. The athletes perform from four to six matches during a day of competition, and this number may increase if the open-class competition, which is held parallel to the competition by weight class, is considered...
December 2017: Sports Medicine—Open
https://www.readbyqxmd.com/read/28177702/modulation-of-mitochondrial-biomarkers-by-intermittent-hypobaric-hypoxia-and-aerobic-exercise-after-eccentric-exercise-in-trained-rats
#5
David Rizo-Roca, Juan Gabriel Ríos-Kristjánsson, Cristian Núñez-Espinosa, Estela Santos-Alves, José Magalhães, António Ascensão, Teresa Pagès, Ginés Viscor, Joan Ramon Torrella
Unaccustomed eccentric contractions induce muscle damage, calcium homeostasis disruption and mitochondrial alterations. Since exercise and hypoxia are known to modulate mitochondrial function, we aimed to analyze the effects on eccentric exercise-induced muscle damage (EEIMD), in trained rats, of two recovery protocols based on: 1) intermittent hypobaric hypoxia (IHH) and 2) IHH followed by exercise. The expression of biomarkers related to mitochondrial biogenesis, dynamics, oxidative stress and bioenergetics was evaluated...
February 2, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28169439/postretrieval-extinction-attenuates-alcohol-cue-reactivity-in-rats
#6
Roberto U Cofresí, Suzanne M Lewis, Nadia Chaudhri, Hongjoo J Lee, Marie-H Monfils, Rueben A Gonzales
BACKGROUND: Conditioned responses to alcohol-associated cues can hinder recovery from alcohol use disorder (AUD). Cue exposure (extinction) therapy (CET) can reduce reactivity to alcohol cues, but its efficacy is limited by phenomena such as spontaneous recovery and reinstatement that can cause a return of conditioned responding after extinction. Using a preclinical model of alcohol cue reactivity in rats, we evaluated whether the efficacy of alcohol CET could be improved by conducting CET during the memory reconsolidation window after retrieval of cue-alcohol associations...
February 7, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28166603/electroacupuncture-attenuates-hyperalgesia-in-rats-withdrawn-from-chronic-alcohol-drinking-via-habenular-mu-opioid-receptors
#7
Jing Li, Caihong Fu, Hongwei Liu, Rao Fu, Wanhong Zuo, Seungwoo Kang, Pei Chen, Danielle Gregor, Rose Paulose, Alex Bekker, Jiang-Hong Ye
BACKGROUND: Hyperalgesia or increased sensitivity to pain is often found in alcoholics during alcohol withdrawal and may contribute to relapse drinking. Alternative therapies such as acupuncture and electroacupuncture (EA), through mechanisms involving opioid receptors, may reduce pain and substance dependence and withdrawal syndromes. The lateral habenula (LHb), an epithalamic structure rich in mu opioid receptors (MORs), is a critical target for both drugs of abuse and pain. We previously observed hyperalgesia in rats withdrawn from chronic ethanol (EtOH) drinking and found that EA at the acupoint Zusanli (ST36) reduced EtOH intake...
February 6, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28154796/continuous-vs-intermittent-neurofeedback-to-regulate-auditory-cortex-activity-of-tinnitus-patients-using-real-time-fmri-a-pilot-study
#8
Kirsten Emmert, Rotem Kopel, Yury Koush, Raphael Maire, Pascal Senn, Dimitri Van De Ville, Sven Haller
The emerging technique of real-time fMRI neurofeedback trains individuals to regulate their own brain activity via feedback from an fMRI measure of neural activity. Optimum feedback presentation has yet to be determined, particularly when working with clinical populations. To this end, we compared continuous against intermittent feedback in subjects with tinnitus. Fourteen participants with tinnitus completed the whole experiment consisting of nine runs (3 runs × 3 days). Prior to the neurofeedback, the target region was localized within the auditory cortex using auditory stimulation (1 kHz tone pulsating at 6 Hz) in an ON-OFF block design...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28150471/the-effect-of-4-weeks-fixed-and-mixed-intermittent-hypoxic-training-iht-on-respiratory-metabolic-and-acid-base-response-of-capillary-blood-during-submaximal-bicycle-exercise-in-male-elite-taekwondo-players
#9
Hun-Young Park, Sub Sunoo, Sang-Seok Nam
Purpose: The purpose of our study was to determine the effectiveness of 4 weeks fixed and mixed intermittent hypoxic training (IHT) and its difference from exercise training at sea-level on exercise load, respiratory metabolic and acid-base response of capillary blood during 80% maximal heart rate (HRmax) bicycle exercise in male elite Taekwondo players. Methods: Male elite Taekwondo players (n = 25 out of 33) were randomly assigned to training at sea-level (n = 8, control group), training at 16...
December 31, 2016: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/28149381/comparison-between-two-types-of-anaerobic-speed-endurance-training-in-competitive-soccer-players
#10
Magni Mohr, Peter Krustrup
The purpose of the present study was to examine the effects of additional in-season speed endurance production versus speed endurance maintenance training regimes on performance in competitive male soccer players. In a randomised controlled trial 18 male sub-elite players were exposed to additional speed endurance production (SEP) or speed endurance maintenance (SEM) training (two additional sessions/wk for 4 weeks) during the competitive season. Players performed the Yo-Yo intermittent recovery level 2 test (YYIR2) and a repeated sprint test (RST) pre- and post-intervention...
June 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28149347/application-of-a-physiological-strain-index-in-evaluating-responses-to-exercise-stress-a-comparison-between-endurance-and-high-intensity-intermittent-trained-athletes
#11
Ilona Pokora, Aleksandra Żebrowska
The study evaluated differences in response to exercise stress between endurance and high-intensity intermittent trained athletes in a thermoneutral environment using a physiological strain index (PSI). Thirty-two subjects participated in a running exercise under normal (23°C, 50% RH) conditions. The group included nine endurance trained athletes (middle-distance runners - MD), twelve high-intensity intermittent trained athletes (soccer players - HIIT) and eleven students who constituted a control group. The exercise started at a speed of 4 km·h(-1) which was increased every 3 min by 2 km·h(-1) to volitional exhaustion...
April 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28146032/different-training-loads-partially-influence-physiological-responses-to-preparation-period-in-basketball
#12
Davide Ferioli, Andrea Bosio, Antonio La Torre, Domenico Carlomagno, Darragh R Connolly, Ermanno Rampinini
The aim of this study was to compare perceived TL (sRPE-TL), training volume (TV) and the changes in physical fitness between professional (n=14) and semi-professional (n=18) basketball players during the preparation period. Furthermore, relationships between sRPE-TL and TV with changes in physical fitness level were investigated. The players performed the Yo-Yo Intermittent Recovery Test (Yo-Yo IR1) before and after the preparation period. In addition, physiological responses to a standardized 6-min continuous running test (Mognoni's test) and to a standardized 5-min high-intensity intermittent running test (HIT) were measured...
January 30, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28143367/does-a-resistance-exercise-session-with-continuous-or-intermittent-blood-flow-restriction-promote-muscle-damage-and-increase-oxidative-stress
#13
Gabriel R Neto, Jefferson S Novaes, Verônica P Salerno, Michel M Gonçalves, Gilmário R Batista, Maria S Cirilo-Sousa
The aim of this study was to compare the effect of low-load resistance exercise (LLRE) with continuous and intermittent blood flow restriction (BFR) on the creatine kinase (CK), lactate dehydrogenase (LDH), protein carbonyl (PC), thiobarbituric acid-reactive substance (TBARS) and uric acid (UA) levels in military men. The study included 10 recreationally trained men aged 19 ± 0.82 years who underwent the following experimental protocols in random order on separate days (72-96 h): 4 LLRE sessions at a 20% 1RM (one-repetition maximum [1RM]) with continuous BFR (LLRE + CBFR); 4 LLRE sessions at 20% 1RM with intermittent BFR (LLRE + IBFR) and 4 high-intensity resistance exercise (HIRE) sessions at 80% 1RM...
January 31, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28137785/high-intensity-intermittent-training-versus-moderate-intensity-intermittent-training-is-it-a-matter-of-intensity-or-intermittent-efforts
#14
EDITORIAL
David Jiménez-Pavón, Carl J Lavie
No abstract text is available yet for this article.
January 30, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28124381/broad-spectrum-health-improvements-with-one-year-of-soccer-training-in-inactive-mildly-hypertensive-middle-aged-women
#15
P Krustrup, M-B Skoradal, M B Randers, P Weihe, J Uth, J Mortensen, M Mohr
The study tested the hypothesis that long-term soccer training has positive impact on cardiovascular profile, body composition, bone health, and physical capacity in inactive, pre-menopausal women with mild hypertension. The study applied a randomized controlled design in which physically inactive middle-aged women were separated into a soccer training group (n=19; SOC) and a control group (n=12; CON). SOC performed 128±29 (±SD) one-h small-sided soccer training sessions over one year. Blood pressure, body composition, blood lipid profile, and fitness level were determined pre- and post-intervention...
January 25, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28122719/high-intensity-intermittent-exercise-training-with-chlorella-intake-accelerates-exercise-performance-and-muscle-glycolytic-and-oxidative-capacity-in-rats
#16
Naoki Horii, Natsuki Hasegawa, Shumpei Fujie, Masataka Uchida, Eri Miyamoto-Mikami, Takeshi Hashimoto, Izumi Tabata, Motoyuki Iemitsu
The purpose of this study was to investigate the effect of chronic chlorella intake alone or in combination with high-intensity intermittent exercise (HIIE) training on exercise performance and muscle glycolytic and oxidative metabolism in rats. Forty male Sprague-Dawley rats were randomly assigned to the four groups: sedentary control, chlorella intake (0.5% chlorella powder in normal feed), HIIE training, and combination of HIIE training and chlorella intake for 6 weeks (n = 10 each group). HIIE training comprised 14 repeats of a 20-s swimming session with a 10-s pause between sessions, while bearing a weight equivalent to 16% of body weight, 4 days/week...
January 25, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28118308/delayed-onset-muscle-soreness-and-perceived-exertion-following-blood-flow-restriction-exercise
#17
Christopher R Brandner, Stuart A Warmington
The purpose of this study was to determine the perceptual responses to resistance exercise with either heavy-loads (80% 1 repetition maximum [1-RM]), light-loads (20% 1-RM), or light-loads in combination with blood flow restriction (BFR). Despite the use of light-loads, it has been suggested that the adoption of BFR resistance exercise may be limited due to increases in delayed onset muscle soreness (DOMS) and perceived exertion. Seventeen healthy untrained males participated in this balanced, randomized cross-over study...
January 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28113982/forces-that-supplement-visuomotor-learning-a-sensory-crossover-experiment
#18
Moria Fisher Bittmann, James L Patton
Previous studies on reaching movements have shown that people can adapt to either visuomotor (e.g., prism glasses) or mechanical distortions (e.g., force fields) through repetitive practice. Recent work has shown that adaptation to one type of distortion might have implications on learning the other type, suggesting that neural resources are common to both kinematic and kinetic adaptation. This study investigated whether training with a novel force field might benefit the learning of a visual distortion - specifically, when forces were designed to produce aftereffects that aligned with the ideal trajectory for a visual rotation...
September 23, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28098946/negative-association-between-mr-spectroscopic-glutamate-markers-and-gray-matter-volume-after-alcohol-withdrawal-in-the-hippocampus-a-translational-study-in-humans-and-rats
#19
Ulrich Frischknecht, Derik Hermann, Nuran Tunc-Skarka, Guo-Ying Wang, Markus Sack, Julia van Eijk, Traute Demirakca, Claudia Falfan-Melgoza, Bertram Krumm, Sandra Dieter, Rainer Spanagel, Falk Kiefer, Karl F Mann, Wolfgang H Sommer, Gabriele Ende, Wolfgang Weber-Fahr
BACKGROUND: Both chronic alcohol consumption and alcohol withdrawal lead to neural tissue damage which partly recovers during abstinence. This study investigated withdrawal-associated changes in glutamatergic compounds, markers of neuronal integrity, and gray matter volumes during acute alcohol withdrawal in the hippocampus, a key region in development and maintenance of alcohol dependence in humans and rats. METHODS: Alcohol-dependent patients (N = 39) underwent magnetic resonance imaging (MRI) and MR spectroscopy (MRS) measurements within 24 hours after the last drink and after 2 weeks of abstinence...
February 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28090139/the-blood-antioxidant-defence-capacity-during-intermittent-hypoxic-training-in-elite-swimmers
#20
S Poprzęcki, M Czuba, A Zając, J Karpiński, R Wilk, G Bril, A Maszczyk, M Toborek
The main objective of this study was to examine the chronic effect of simulated intermittent normobaric hypoxia on blood antioxidant defence capacity in swimmers. The study included 14 male and 14 female competitive swimmers performing part of land training under simulated intermittent normobaric hypoxia (O2 = 15.5%) or in normoxia. Land interval training took place twice per week, with a total of 8 training units during the study, performed with individualized intensity. The activities of blood antioxidant enzymes did not change significantly during the first and last training unit in the hypoxic and normoxic group...
December 2016: Biology of Sport
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