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Intermittent exercise

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https://www.readbyqxmd.com/read/28808490/the-influence-of-intermittent-fasting-on-the-circadian-pattern-of-melatonin-while-controlling-for-caloric-intake-energy-expenditure-light-exposure-and-sleep-schedules-a-preliminary-report
#1
Aljohara S Almeneessier, Ahmed S Bahammam, Munir M Sharif, Salman A Bahammam, Samar Z Nashwan, Seithikurippu R Pandi Perumal, Daniel P Cardinali, Mohammad Alzoghaibi
AIMS: We hypothesized that if we control for food composition, caloric intake, light exposure, sleep schedule, and exercise, intermittent fasting would not influence the circadian pattern of melatonin. Therefore, we designed this study to assess the effect of intermittent fasting on the circadian pattern of melatonin. METHODS: Eight healthy volunteers with a mean age of 26.6 ± 4.9 years and body mass index of 23.7 ± 3.5 kg/m(2) reported to the Sleep Disorders Center (the laboratory) on four occasions: (1) adaptation, (2) 4 weeks before Ramadan while performing Islamic intermittent fasting for 1 week (fasting outside Ramadan [FOR]), (3) 1 week before Ramadan (nonfasting baseline [BL]), and (4) during the 2(nd) week of Ramadan while fasting (Ramadan)...
July 2017: Annals of Thoracic Medicine
https://www.readbyqxmd.com/read/28797831/validity-of-the-actigraph-gt3x-and-bodymedia-sensewear-armband-to-estimate-energy-expenditure-during-physical-activity-and-sport
#2
Paul B Gastin, Cassy Cayzer, Dan Dwyer, Sam Robertson
OBJECTIVES: The purpose of this study was to assess the validity of the ActiGraph GT3X+ (GT3X+) and the BodyMedia SenseWear Armband (SWA) to estimate energy expenditure (EE) during physical activity and field sport movements. DESIGN: Criterion validity. METHODS: Twenty-six active adults completed a single 90min session involving alternating intervals of exercise (5min) and recovery (10min). Exercise involved walking (4km/h), jogging (8km/h), running (12km/h) or a sport-simulated circuit (three intervals)...
July 31, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28797281/the-efficacy-of-transcutaneous-electrical-nerve-stimulation-on-the-improvement-of-walking-distance-in-patients-with-peripheral-arterial-disease-with-intermittent-claudication-study-protocol-for-a-randomised-controlled-trial-the-tens-pad-study
#3
Florent Besnier, Jean-Michel Sénard, Vincent Grémeaux, Mélanie Riédel, Damien Garrigues, Thibaut Guiraud, Marc Labrunée
BACKGROUND: In patients with peripheral arterial disease (PAD), walking improvements are often limited by early pain onset due to vascular claudication. It would thus appear interesting to develop noninvasive therapeutic strategies, such as transcutaneous electrical nerve stimulation (TENS), to improve the participation of PAD patients in rehabilitation programmes, and thus improve their quality of life. Our team recently tested the efficacy of a single 45-min session of 10-Hz TENS prior to walking...
August 10, 2017: Trials
https://www.readbyqxmd.com/read/28783846/cardiorespiratory-responses-to-continuous-and-intermittent-exercises-in-children
#4
Georges Baquet, François-Xavier Gamelin, Julien Aucouturier, Serge Berthoin
The aim of the study was to characterize aerobic responses to high intensity intermittent (HIIE) and continuous (CE) exercises in prepubertal children. 26 children aged 8 to 11-year-old took part in a preliminary session to determine peakVO2 and Maximal Aerobic Velocity (MAV). In 5 subsequent experimental visits, the participants completed 2 CE and 3 HIIE sessions in a randomized order. HIIE consisted of short intermittent 10-s and 20-s running bouts at 100 to 130% MAV, interspersed with recovery periods of equal duration (S-HIIE1 and S-HIIE2 respectively) and 5-s of sprinting and jumping at maximal intensity with 15-s recovery periods (S-HIIE3)...
August 7, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28776675/dissociating-external-power-from-intramuscular-exercise-intensity-during-intermittent-bilateral-knee-extension-in-humans
#5
Matthew J Davies, Alan P Benson, Daniel T Cannon, Simon Marwood, Graham J Kemp, Harry B Rossiter, Carrie Ferguson
Compared with work-matched high-intensity continuous exercise, intermittent exercise dissociates pulmonary oxygen uptake (V̇O2 ) from the accumulated work. The extent to which this reflects differences in O2 storage fluctuations and/or contributions from oxidative and substrate-level bioenergetics is unknown. Using pulmonary gas-exchange and intramuscular (31) P magnetic resonance spectroscopy, we tested the hypotheses that at the same power: ATP synthesis rates are similar; but peak V̇O2 amplitude is lower in intermittent vs...
August 4, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28767527/bioenergetics-and-atp-synthesis-during-exercise-role-of-group-iii-iv-muscle-afferents
#6
Ryan M Broxterman, Gwenael Layec, Thomas J Hureau, David E Morgan, Amber D Bledsoe, Jacob E Jessop, Markus Amann, Russell S Richardson
PURPOSE: To investigate the role of the group III/IV muscle afferents in the bioenergetics of exercising skeletal muscle beyond constraining the magnitude of metabolic perturbation. METHODS: Eight healthy men, performed intermittent isometric knee-extensor exercise to task failure at ~58% maximal voluntary contraction (MVC) under control conditions (CTRL) and with lumbar intrathecal fentanyl to attenuate group III/IV leg muscle afferents (FENT). Intramuscular concentrations of phosphocreatine (PCr), inorganic phosphate (Pi), diprotonated phosphate (H2PO4¯), adenosine triphosphate (ATP), and pH were determined using phosphorous magnetic resonance spectroscopy (P-MRS)...
July 31, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28763620/acute-effects-of-exercise-intensity-on-subsequent-substrate-utilisation-appetite-and-energy-balance-in-men-and-women
#7
Ghalia Shamlan, Paul Bech, M Denise Robertson, Adam L Collins
Exercise is capable of influencing the regulation of energy balance by acutely modulating appetite and energy intake coupled to effects on substrate utilization. Yet, few studies have examined acute effects of exercise intensity on aspects of both energy intake and energy metabolism, independently of energy cost of exercise. Furthermore, little is known as to the gender differences of these effect. One hour after a standardised breakfast, 40 (19 female), healthy participants (BMI 23.6±3.6 kg.m-2, VO2peak 34...
August 1, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28763443/intermittent-hypoxic-training-improves-anaerobic-performance-in-competitive-swimmers-when-implemented-into-a-direct-competition-mesocycle
#8
Miłosz Czuba, Robert Wilk, Jakub Karpiński, Małgorzata Chalimoniuk, Adam Zajac, Józef Langfort
The main objective of this research was to evaluate the efficacy of intermittent hypoxic training (IHT) on anaerobic and aerobic capacity and swimming performance in well-trained swimmers. Sixteen male swimmers were randomly divided into a hypoxia (H) group (n = 8), which trained in a normobaric hypoxia environment, and a control (C) group (n = 8), which exercised under normoxic conditions. However, one participant left the study without explanation. During the experiment group H trained on land twice per week in simulated hypoxia (FiO2 = 15...
2017: PloS One
https://www.readbyqxmd.com/read/28762914/-adaptation-to-intermittent-hypoxia-hyperoxia-in-the-rehabilitation-of-patients-with-ischemic-heart-disease-exercise-tolerance-and-quality-of-life
#9
A L Syrkin, O S Glazachev, F Y Kopylov, E N Dudnik, E E Zagaynaya, D S Tuter
AIM: to assess effect of interval hypoxic-hyperoxic training (IT) on exercise tolerance and quality of life of patients with ischemic heart disease (IHD) receiving optimal medical therapy, as well as the safety of IHHT use. METHODS: Patients with stable IHD with functional class II and III angina (n=46) were randomized into two groups: IHHT (n=27, 15 treatments in 3 weeks), and IHHT imitation (n=19). Cardiopulmonary stress test was performed to evaluate the following parameters of exercise tolerance: peak oxygen consumption (VO2peak, VO2peak/kg), % of predicted peak oxygen consumption (%VO2 peak) and anaerobic threshold (VO2AT)...
May 2017: Kardiologiia
https://www.readbyqxmd.com/read/28752607/reproducibility-of-heart-rate-recovery-in-patients-with-intermittent-claudication
#10
Rafael Yokoyama Fecchio, Marcel Chehuen, Tiago Peçanha, Gabriel Grizzo Cucato, Luiz Augusto Riani Costa, Anthony Scott Leicht, Raphael Mendes Ritti-Dias, Nelson Wolosker, Cláudia Lúcia de Moraes Forjaz
BACKGROUND: Postexercise heart rate recovery (HRR) is a non-invasive tool for cardiac autonomic function assessment. Reproducibility of HRR has been established in healthy subjects; however, no study has evaluated this reproducibility in clinical populations who may present autonomic dysfunction. Patients with peripheral artery disease and intermittent claudication (IC) often present altered cardiac autonomic function and HRR could be an interesting tool for evaluating autonomic responses to interventions in this population...
July 28, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28746245/the-physical-and-physiological-demands-of-elite-international-female-field-hockey-players-during-competitive-match-play
#11
Aideen McGuinness, Shane Malone, George Petrakos, Kieran Collins
The aim of the current investigation was to quantify the physical and physiological demands of elite international female field hockey match-play across halves of play. Thirty-eight participants (24 ± 5 years; 173 ± 5 cm; 72 ± 5 kg) took part in nineteen competitive matches during the 2014 - 2015 season. Participants were monitored with GPS technology and heart rate monitors. Players were categorized based on three different playing positions. Activity was categorized into total (m), high-speed running distance (m; >16 km·h) and relative distance (m·min) due to the use of rolling substitutions...
July 24, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28738672/physiological-and-physical-responses-to-wearing-compression-garments-during-soccer-matches-and-recovery
#12
Diego Marqués-Jiménez, Julio Calleja-González, Iñaki Arratibel, Anne Delextrat, Fernando Uriarte, Nicolás Terrados
BACKGROUND: There is not enough information on the effects of compression therapy in soccer players during recovery after matches. So the objective of this study was to examine the effect of wearing compression garments during soccer matches and during recovery period on physical responses. METHODS: Eighteen semi-professional soccer players participated in this study. A two-stage crossover design was chosen. Participants acted as controls in one match and were assigned to an experimental group (compression stockings group, full-leg compression group, shorts group) in the other match...
July 24, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28735949/hip-flexor-muscle-dysfunction-during-walking-at-self-selected-and-fast-speed-in-patients-with-aortoiliac-peripheral-arterial-disease
#13
COMPARATIVE STUDY
Takaaki Kakihana, Osamu Ito, Yusuke Sekiguchi, Daisuke Ito, Hitoshi Goto, Daijirou Akamatsu, Yasuharu Matsumoto, Masahiro Kohzuki
OBJECTIVE: Intermittent claudication aggravates physical function and is associated with an increased risk of death in patients with peripheral arterial disease (PAD). Previous studies on kinetic parameters (joint moment and power) of lower limbs in these patients have largely focused on the decline in the ankle plantar flexor moment and power at self-selected (SS) walking speed, which may not be an optimal condition to induce claudication pain. In the present study, we investigated the abnormalities in joint kinetic parameters in patients with PAD at both SS and at fast walking speeds...
August 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28728559/effect-of-insulin-therapy-and-dietary-adjustments-on-safety-and-performance-during-simulated-soccer-tests-in-people-with-type-1-diabetes-study-protocol-for-a-randomized-controlled-trial
#14
Javier Calvo-Marín, Gabriel Torrealba-Acosta, Matthew Campbell, Jesse Gaboury, Ajmol Ali, Chih Hao Chen-Ku
BACKGROUND: Despite the reduction in glycemic derangement in patients with type 1 diabetes mellitus (T1D) through dietary and therapeutic adjustments implemented before, during and after continuous exercise, evidence for its effectiveness with intermittent forms of exercise, such as soccer, is still lacking. METHODS/DESIGN: We designed a study protocol for a randomized, crossover, double-blinded, controlled trial, for the evaluation of the effect that a strategy of dietary and therapeutic modifications may have on safety and performance of persons with T1D in soccer training sessions and cognitive testing...
July 20, 2017: Trials
https://www.readbyqxmd.com/read/28723843/no-superior-adaptations-to-carbohydrate-periodization-in-elite-endurance-athletes
#15
Kasper Degn Gejl, Line Thams, Mette Hansen, Torben Rokkedal-Lausch, Peter Plomgaard, Lars Nybo, Filip J Larsen, Daniele A Cardinale, Kurt Jensen, Hans-Christer Holmberg, Kristian Vissing, Niels Ørtenblad
PURPOSE: The present study investigated the effects of periodic CHO restriction on endurance performance and metabolic markers in elite endurance athletes. METHODS: Twenty-six male elite endurance athletes (VO2max: 65.0 ml O2[BULLET OPERATOR]kg[BULLET OPERATOR]min) completed 4 weeks of regular endurance training, while matched and randomized into two groups training with (Low) or without (High) carbohydrate (CHO) manipulation three days a week. The CHO manipulation days consisted of a 1-hr high intensity bike session in the morning, recovery for 7 hrs while consuming isocaloric diets containing either high CHO (414±2...
July 19, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28722467/the-influence-of-lower-extremity-lean-mass-on-landing-biomechanics-during-prolonged-exercise
#16
Melissa M Montgomery, Amanda J Tritsch, John R Cone, Randy J Schmitz, Robert A Henson, Sandra J Shultz
CONTEXT:   The extent to which lower extremity lean mass (LELM) relative to total body mass influences one's ability to maintain safe landing biomechanics during prolonged exercise when injury incidence increases is unknown. OBJECTIVES:   To examine the influence of LELM on (1) pre-exercise lower extremity biomechanics and (2) changes in biomechanics during an intermittent exercise protocol (IEP) and (3) determine whether these relationships differ by sex. We hypothesized that less LELM would predict higher-risk baseline biomechanics and greater changes toward higher-risk biomechanics during the IEP...
August 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28715597/the-proposal-of-a-clinical-protocol-to-assess-central-and-peripheral-fatigue-in-myotonic-dystrophy-type-1
#17
S Baldanzi, G Ricci, M Bottari, L Chico, C Simoncini, G Siciliano
DM1 is an autosomal-dominant disorder characterized by muscle weakness, myotonia, and multisystemic involvement. According to current literature fatigue and daytime sleepiness are among the main symptoms of DM1. Oxidative stress has been proposed to be one of the pathogenic factors of fatigue consequent to DM1. In this study, we investigated the dimensions of experienced fatigue and  physiological fatigue in a sample of 26 DM1 patients (17 males, 9 females, mean age 41.6 years, SD±12.7); experienced fatigue has been studied through Fatigue Severity Scale (FSS), and physiological fatigue was measured through an intermittent incremental exercise of the forearm muscles using a myometer; oxidative stress balance markers trend during aerobic exercise test have been collected...
July 1, 2017: Archives Italiennes de Biologie
https://www.readbyqxmd.com/read/28708702/exercise-induced-fatigue-in-severe-hypoxia-following-an-intermittent-hypoxic-protocol
#18
Rosie Twomey, James Wrightson, Hannah Fletcher, Stephanie Avraam, Emma Ross, Jeanne Dekerle
PURPOSE: Exercise-induced central fatigue is alleviated following acclimatisation to high altitude. The adaptations underpinning this effect may also be induced with brief, repeated exposures to severe hypoxia. The purpose of this study was to determine whether (i) exercise tolerance in severe hypoxia would be improved following an intermittent hypoxic (IH) protocol and (ii) exercise-induced central fatigue would be alleviated following an IH protocol. METHODS: Nineteen recreationally-active males were randomised into two groups who completed ten 2-h exposures in severe hypoxia (IH: PIO2 82 mmHg; n=11) or normoxia (control; n=8)...
July 13, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28705431/-effect-of-intermittent-variable-intensity-exercise-on-qt-variation-and-risk-of-sudden-cardiac-death-among-cameroonian-school-adolescents
#19
E C Bika Lele, M N Pepouomi, A Temfemo, J Mekoulou, P Assomo Ndemba, S H Mandengue
INTRODUCTION: Several cases of sudden deaths are observed among students practicing sport and physical activity (SPA). Just few studies have been carried out on the variation of the QT (interval) and risk of sudden death during sporting exercises. AIM: To determine the effect of variable intermittent stress intensity on the variation of QT and the risk of sudden cardiac death. PATIENTS AND METHODS: Form 4, lower sixth and upper sixth students were recruited from a high school in Douala (Cameroon)...
July 10, 2017: Annales de Cardiologie et D'angéiologie
https://www.readbyqxmd.com/read/28704307/acute-cardiopulmonary-metabolic-and-neuromuscular-responses-to-severe-intensity-intermittent-exercises
#20
Felipe D Lisbôa, João A G Raimundo, Amadeo F Salvador, Kayo L Pereira, Tiago Turnes, Fernando Diefenthaeler, Mariana F M de Oliveira, Fabrizio Caputo
The purpose of this study was to compare cardiopulmonary, neuromuscular, and metabolic responses to severe-intensity intermittent exercises with variable or constant work rate. Eleven cyclists (28 ± 5 years; 74 ± 7 kg; 175 ± 5 cm; 63 ± 4 mL·kg·min) performed the following tests until exhaustion on separate days: 1) an incremental test; 2) in random order, two constant work rate tests at 95% and 110% of the peak power for the determination of Critical Power (CP); 3) 2-4 tests for the determination of the highest power that still permits the achievement of maximal oxygen uptake (PHIGH); and 4) two random severe-intensity intermittent exercises...
July 12, 2017: Journal of Strength and Conditioning Research
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