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recovery interval training density

Boris Schmitz, Pieter Nelis, Florian Rolfes, Maged Alnawaiseh, Andreas Klose, Michael Krüger, Nicole Eter, Stefan-Martin Brand, Florian Alten
BACKGROUND AND AIMS: High-intensity interval training (HIIT) has been identified to be efficient for increasing health-related fitness in general and in lifestyle-induced chronic diseases such as hypertension, obesity and metabolic syndrome. This study aimed to evaluate HIIT effects on optic nerve head (ONH) and macular perfusion in healthy adults using optical coherence tomography angiography (OCTA). METHODS: Fifty-eight healthy participants (22.0 ± 2.02 years, 40 females (69...
April 26, 2018: Atherosclerosis
James P Raleigh, Matthew D Giles, Hashim Islam, Matthew William Nelms, Robert F Bentley, Joshua H Jones, J Alberto Neder, Kristen Boonstra, Joe Quadrilatero, Craig A Simpson, Michael E Tschakovsky, Brendon J Gurd
The current study examined the contribution of central and peripheral adaptations to changes in maximal oxygen uptake (VO<sub>2</sub>max) following sprint interval training (SIT). Twenty-three males completed four weekly SIT sessions (8 x 20 second cycling bouts at ~170% of work rate at VO<sub>2</sub>max, 10 second recovery) for four weeks. Following completion of training, the relationship between changes in VO<sub>2</sub>max and changes in central (cardiac output) and peripheral (a-vO<sub>2</sub>diff, muscle capillary density, oxidative capacity, fibre-type distribution) adaptations was determined in all participants using correlation analysis...
May 7, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
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
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
Kerry McGawley, Elisabeth Juudas, Zuzanna Kazior, Kristoffer Ström, Eva Blomstrand, Ola Hansson, Hans-Christer Holmberg
Introduction: The current study aimed to investigate the responses to block- versus evenly-distributed high-intensity interval training (HIT) within a polarized microcycle. Methods: Twenty well-trained junior cross-country skiers (10 males, age 17.6 ± 1.5 and 10 females, age 17.3 ± 1.5) completed two, 3-week periods of training (EVEN and BLOCK) in a randomized, crossover-design study. In EVEN, 3 HIT sessions (5 × 4-min of diagonal-stride roller-skiing) were completed at a maximal sustainable intensity each week while low-intensity training (LIT) was distributed evenly around the HIT...
2017: Frontiers in Physiology
Zhaowei Kong, Qingde Shi, Jinlei Nie, Tomas K Tong, Lili Song, Longyan Yi, Yang Hu
Previous studies have investigated the effects of high-intensity interval training (HIIT) on cardiorespiratory fitness and body composition in overweight populations. However, the additive effect of HIIT and hypoxia on health parameters is not clear. This study compared the effects of HIIT under hypoxic conditions on cardiometabolic function with that under normoxia in overweight Chinese young women. Methods: A double-blind randomized controlled experimental design was applied. Twenty-four sedentary overweight Chinese young women (weight: 68...
2017: Frontiers in Physiology
Jacob T Bonafiglia, Brittany A Edgett, Brittany L Baechler, Matthew W Nelms, Craig A Simpson, Joe Quadrilatero, Brendon J Gurd
The purpose of the present study was to determine if acute responses in PGC-1α, VEGFA, SDHA, and GPD1-2 mRNA expression predict their associated chronic skeletal muscle molecular (SDH-GPD activity and substrate storage) and morphological (fibre-type composition and capillary density) adaptations following training. Skeletal muscle biopsies were collected from 14 recreationally active men (age: 22.0 ± 2.4 years) before (PRE) and 3 h after (3HR) the completion of an acute bout of sprint interval training (SIT) (eight 20-s intervals at ∼170% peak oxygen uptake work rate separated by 10 s of recovery)...
June 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
Eduardo Martinez-Valdes, Deborah Falla, Francesco Negro, Frank Mayer, Dario Farina
PURPOSE: Using a novel technique of high-density surface EMG decomposition and motor unit (MU) tracking, we compared changes in the properties of vastus medialis and vastus lateralis MU after endurance (END) and high-intensity interval training (HIIT). METHODS: Sixteen men were assigned to the END or the HIIT group (n = 8 each) and performed six training sessions for 14 d. Each session consisted of 8-12 × 60-s intervals at 100% peak power output separated by 75 s of recovery (HIIT) or 90-120 min continuous cycling at ~65% V˙O2peak (END)...
June 2017: Medicine and Science in Sports and Exercise
Martin J MacInnis, Martin J Gibala
Interval exercise typically involves repeated bouts of relatively intense exercise interspersed by short periods of recovery. A common classification scheme subdivides this method into high-intensity interval training (HIIT; 'near maximal' efforts) and sprint interval training (SIT; 'supramaximal' efforts). Both forms of interval training induce the classic physiological adaptations characteristic of moderate-intensity continuous training (MICT) such as increased aerobic capacity (V̇O2 max ) and mitochondrial content...
May 1, 2017: Journal of Physiology
Dyan Ramekers, Huib Versnel, Stefan B Strahl, Sjaak F L Klis, Wilko Grolman
Successful cochlear implant performance requires adequate responsiveness of the auditory nerve to prolonged pulsatile electrical stimulation. Degeneration of the auditory nerve as a result of severe hair cell loss could considerably compromise this ability. The main objective of this study was to characterize the recovery of the electrically stimulated auditory nerve, as well as to evaluate possible changes caused by deafness-induced degeneration. To this end we studied temporal responsiveness of the auditory nerve in a guinea pig model of sensorineural hearing loss...
March 2015: Hearing Research
Timothy J Demchak, Jon K Linderman, W Jerry Mysiw, Rebecca Jackson, Jihong Suun, Steven T Devor
The purpose of this study was to compare three different intervals for a between sets rest period during a common isokinetic knee extension strength-testing protocol of twenty older Brazilian men (66.30 ± 3.92 yrs). The volunteers underwent unilateral knee extension (Biodex System 3) testing to determine their individual isokinetic peak torque at 60, 90, and 120° ·s-1. The contraction speeds and the rest periods between sets (30, 60 and 90 s) were randomly performed in three different days with a minimum rest period of 48 hours...
September 1, 2005: Journal of Sports Science & Medicine
Zaqueline F Guerra, Tiago Peçanha, Débora N Moreira, Lilian P Silva, Mateus C Laterza, Fábio Y Nakamura, Jorge R P Lima
The aim of the study was to investigate the influence of training load and exercise mode on heart rate variability and heart rate recovery (HRR) in healthy individuals. The subjects were divided into three groups: sedentary (SED), resistance trained (RT) and aerobically trained (RT). Resting and postmaximal exercise RR intervals were recorded on supine and seated position, respectively. The HRV indices calculated in the resting position were RMSSD and LF and HF power densities. The following HRR indices were calculated throughout the 5-minute postmaximal recovery period: semi-logarithmic regression analysis of the first 30 s (T30); absolute difference between the peak and 60 s HR (HRR(60s)); and mono-exponential time constant of HRR (HRRτ)...
March 2014: Clinical Physiology and Functional Imaging
Holly S Kessler, Susan B Sisson, Kevin R Short
In the US, 34% of adults currently meet the criteria for the metabolic syndrome defined by elevated waist circumference, plasma triglycerides (TG), fasting glucose and/or blood pressure, and decreased high-density lipoprotein cholesterol (HDL-C). While these cardiometabolic risk factors can be treated with medication, lifestyle modification is strongly recommended as a first-line approach. The purpose of this review is to focus on the effect of physical activity interventions and, specifically, on the potential benefits of incorporating higher intensity exercise...
June 1, 2012: Sports Medicine
T P Gunnarsson, J Bangsbo
The effect of an alteration from regular endurance to interval (10-20-30) training on the health profile, muscular adaptations, maximum oxygen uptake (Vo(2max)), and performance of runners was examined. Eighteen moderately trained individuals (6 females and 12 males; Vo(2max): 52.2 ± 1.5 ml·kg(-1)·min(-1)) (means ± SE) were divided into a high-intensity training (10-20-30; 3 women and 7 men) and a control (CON; 3 women and 5 men) group. For a 7-wk intervention period the 10-20-30 replaced all training sessions with 10-20-30 training consisting of low-, moderate-, and high-speed running (<30%, <60%, and >90% of maximal intensity) for 30, 20, and 10 s, respectively, in three or four 5-min intervals interspersed by 2 min of recovery, reducing training volume by 54% (14...
July 2012: Journal of Applied Physiology
Trine Moholdt, Inger Lise Aamot, Ingrid Granøien, Lisbeth Gjerde, Gitte Myklebust, Liv Walderhaug, Line Brattbakk, Torstein Hole, Torbjørn Graven, Tomas O Stølen, Brage H Amundsen, Harald Edvard Mølmen-Hansen, Asbjørn Støylen, Ulrik Wisløff, Stig A Slørdahl
OBJECTIVE: Exercise capacity strongly predicts survival and aerobic interval training (AIT) increases peak oxygen uptake effectively in cardiac patients. Usual care in Norway provides exercise training at the hospitals following myocardial infarction (MI), but the effect and actual intensity of these rehabilitation programmes are unknown. DESIGN: Randomized controlled trial. SETTING: Hospital cardiac rehabilitation. SUBJECTS: One hundred and seven patients, recruited two to 12 weeks after MI, were randomized to usual care rehabilitation or treadmill AIT...
January 2012: Clinical Rehabilitation
Piotr Mika, Boguslaw Wilk, Anna Mika, Anna Marchewka, Rafał Nizankowski
OBJECTIVE: To assess the effect of pain-free treadmill training on changes of plasma fibrinogen, haematocrit, lipid profile, and walking ability in patients with claudication. DESIGN: Randomized control trial. METHODS: Sixty-eight patients with peripheral obstructive arterial disease and intermittent claudication (Fontaine stage II) were randomly assigned into the treadmill training (repetitive intervals to onset of claudication pain, three times a week) or a control group (no change in physical activity) over 3 months...
October 2011: European Journal of Cardiovascular Prevention and Rehabilitation
Johannes Zwerver, Evert Verhagen, Fred Hartgens, Inge van den Akker-Scheek, Ron L Diercks
BACKGROUND: Patellar tendinopathy is a major problem for many athletes, especially those involved in jumping activities. Despite its frequency and negative impact on athletic careers, no evidence-based guidelines for management of this overuse injury exist. Since functional outcomes of conservative and surgical treatments remain suboptimal, new diagnostic and therapeutic strategies have to be developed and evaluated. Extracorporeal shockwave therapy (ESWT) appears to be a promising treatment in patients with chronic patellar tendinopathy...
February 8, 2010: BMC Musculoskeletal Disorders
Tomas O Stølen, Morten Andre Høydal, Ole Johan Kemi, Daniele Catalucci, Marcello Ceci, Ellen Aasum, Terje Larsen, Natale Rolim, Gianluigi Condorelli, Godfrey L Smith, Ulrik Wisløff
RATIONALE: In the present study we explored the mechanisms behind excitation-contraction (EC) coupling defects in cardiomyocytes from mice with type-2 diabetes (db/db). OBJECTIVE: We determined whether 13 weeks of aerobic interval training could restore cardiomyocyte Ca(2+) cycling and EC coupling. METHODS AND RESULTS: Reduced contractility in cardiomyocytes isolated from sedentary db/db was associated with increased diastolic sarcoplasmic reticulum (SR)-Ca(2+) leak, reduced synchrony of Ca(2+) release, reduced transverse (T)-tubule density, and lower peak systolic and diastolic Ca(2+) and caffeine-induced Ca(2+) release...
September 11, 2009: Circulation Research
O Bruyere, M-L Brandi, N Burlet, N Harvey, G Lyritis, H Minne, S Boonen, J-Y Reginster, R Rizzoli, K Akesson
BACKGROUND: Hip fracture creates a worldwide morbidity, mortality and economic burden. After surgery, many patients experience long-term disability or die as a consequence of the fracture. A fracture is a major risk factor for a subsequent fracture, which may occur within a short interval. METHODS: A literature search on post-fracture management of patients with hip fracture was performed on the Medline database. Key experts convened to develop a consensus document...
October 2008: Current Medical Research and Opinion
Jordan A Guenette, Benjamin C Sporer, Meaghan J Macnutt, Harvey O Coxson, A William Sheel, John R Mayo, Donald C McKenzie
Noninvasive imaging techniques have been used to assess pulmonary edema following exercise but results remain equivocal. Most studies examining this phenomenon have used male subjects while the female response has received little attention. Some suggest that women, by virtue of their smaller lungs, airways, and diffusion surface areas may be more susceptible to pulmonary limitations during exercise. Accordingly, the purpose of this study was to determine if intense normobaric hypoxic exercise could induce pulmonary edema in women...
September 2007: Journal of Applied Physiology
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