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https://www.readbyqxmd.com/read/28737586/comparison-of-acute-physiological-and-psychological-responses-between-moderate-intensity-continuous-exercise-and-three-regimes-of-high-intensity-training
#1
Nicole Green, Timothy Wertz, Zachary LaPorta, Adam Mora, Jasmine Serbas, Todd A Astorino
High intensity interval training (HIIT) elicits similar physiological adaptations as moderate intensity continuous training (MICT) despite less time commitment. However, there is debate whether HIIT is more aversive than MICT. This study compared physiological and perceptual responses between MICT and three regimes of HIIT. Nineteen active adults (age = 24.0 ± 3.3 yr) unfamiliar with HIIT initially performed ramp exercise to exhaustion to measure maximal oxygen uptake (VO2 max) and determine workload for subsequent sessions, whose order was randomized...
July 19, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28736444/lipid-droplet-remodelling-and-reduced-muscle-ceramides-following-sprint-interval-and-moderate-intensity-continuous-exercise-training-in-obese-males
#2
S O Shepherd, M Cocks, P J Meikle, N A Mellett, A M Ranasinghe, T A Barker, A J M Wagenmakers, C S Shaw
BACKGROUND: In obesity, improved muscle insulin sensitivity following exercise training has been linked to the lowering of diacylglycerol (DAG) and ceramide concentrations. Little is known, however, about how improved insulin action with exercise training in obese individuals relates to lipid droplet (LD) adaptations in skeletal muscle. In this study we investigated the hypothesis that short-term sprint interval training (SIT) and moderate intensity continuous training (MICT) in obese individuals would increase perilipin (PLIN) expression, increase the proportion of LDs in contact with mitochondria and reduce muscle concentrations of DAGs and ceramides...
July 24, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28731979/global-positioning-system-analysis-of-a-high-school-football-scrimmage
#3
Benjamin H Gleason, Matthew L Sams, John T Salley, A Andrew Pustina, Michael H Stone
Gleason, BH, Sams, M, Salley, JT, Pustina, A, and Stone, MH. Global positioning system analysis of a high school football scrimmage. J Strength Cond Res 31(8): 2183-2188, 2017-The purpose of this study was to examine the physical demands of a high school American football scrimmage. Male high school football players (N = 25) participated in a spring scrimmage. Global positioning system data and game film were recorded throughout the entirety of the scrimmage to determine the total distance covered, the distance covered in different velocity bands, the number of accelerations and decelerations performed, and the work-to-rest ratio of the scrimmage...
August 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28704315/appetite-regulations-after-sprint-exercise-under-hypoxic-condition-in-female-athletes
#4
Chihiro Kojima, Nobukazu Kasai, Aya Ishibashi, Yukako Murakami, Kumiko Ebi, Kazushige Goto
The present study determined changes in appetite-regulating hormones and energy intake after high-intensity interval exercise (HIIT) under hypoxic conditions in trained female athletes. Fifteen female athletes completed three trials on different days of either HIIT under hypoxic conditions (HYP), HIIT under normoxic conditions (NOR), or rest in normoxia (CON). Exercise trials consisted of two successive sets of eight repeated bouts of a 6-s maximal sprint separated by a 30-s rest. Blood samples were obtained to measure plasma acylated ghrelin, glucagon-like peptide-1 (GLP-1), and metabolite concentrations...
July 12, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28702435/interval-and-continuous-aerobic-exercise-training-similarly-increase-cardiac-function-and-autonomic-modulation-in-infarcted-mice
#5
Cesar Cavinato Cal Abad, Ademir Manuel do Nascimento, Leandro Eziquiel Dos Santos, Diego Figueroa, Pamella Ramona, Michele Sartori, Katia B Scapini, Oscar Albuquerque, Ivana Cinthya Moraes-Silva, Hélio José Coelho-Júnior, Bruno Rodrigues, Cristiano Teixeira Mostarda, Kátia De Angelis, Maria Cláudia Irigoyen
The present study aimed to compare the effects of moderate-intensity continuous and high-intensity interval exercise training (ET) on exercise tolerance, cardiac morphometry and function, hemodynamic, and cardiac autonomic modulation in myocardial infarcted mice. Wild-type mice (WT) were divided into four groups: sedentary WT (S); WT myocardium infarction sedentary (IS); WT myocardium infarction underwent to moderate-intensity continuous ET (MICT), and WT myocardium infarction underwent to high-intensity interval ET (MIIT)...
June 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/28700513/sled-towing-acutely-decreases-acceleration-sprint-time
#6
Megan A Wong, Ian J Dobbs, Casey M Watkins, Saldiam R Barillas, A Lin, David C Archer, Robert G Lockie, Jared W Coburn, Lee E Brown
Sled towing is a common form of overload training in sports to develop muscular strength for sprinting. This type of training leads to acute and chronic outcomes. Acute training potentially leads to postactivation potentiation (PAP), which is when subsequent muscle performance is enhanced following a preload stimulus. The purpose of this study was to determine differences between rest intervals following sled towing on acute sprint speed. Twenty healthy recreationally trained males (age= 22.3 ± 2.4yrs, height= 176...
July 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28684587/potential-involvement-of-lactate-and-interleukin-6-in-the-appetite-regulatory-hormonal-response-to-an-acute-exercise-bout
#7
Hashim Islam, Logan K Townsend, Greg L McKie, Philip J Medeiros, Brendon James Gurd, Tom J Hazell
High-intensity exercise suppresses appetite partly through changes in peripheral appetite-regulating hormones. Lactate and interleukin-6 (IL-6) mediate the release of these hormones in animal/cell models and may provide a mechanistic link between exercise intensity and appetite regulation. The current study examined changes in appetite-regulating hormones, lactate, and IL-6 after different intensities of running. Eight males completed four experimental sessions: 1) Moderate-intensity continuous training (MICT; 65% VO2max); 2) Vigorous-intensity continuous training (VICT; 85% VO2max); 3) Sprint interval training (SIT; repeated "all-out" sprints); 4) Control (CTRL; no exercise)...
July 6, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28682862/evidence-of-direct-cardiac-damage-following-high-intensity-exercise-in-chronic-energy-restriction-a-case-report-and-literature-review
#8
REVIEW
Marianne F Baird, Fergal Grace, Nicholas Sculthorpe, Scott M Graham, Audrey Fleming, Julien S Baker
RATIONALE: Following prolonged endurance events such as marathons, elevated levels of cardiospecific biomarkers are commonly reported. Although transiently raised levels are generally not considered to indicate clinical myocardial damage, comprehension of this phenomenon remains incomplete. The popularity of high-intensity interval training highlights a paucity of research measuring cardiac biomarker response to this type of exercise. This a posteriori case report discusses the elevation of cardiac troponins (cTn) associated with short interval, high-intensity exercise...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28679683/cold-water-immersion-following-sprint-interval-training-does-not-alter-endurance-signaling-pathways-or-training-adaptations-in-human-skeletal-muscle
#9
James R Broatch, Aaron C Petersen, David John Bishop
We investigated the underlying molecular mechanisms by which post-exercise cold-water immersion (CWI) may alter key markers of mitochondrial biogenesis following both a single session and six weeks of sprint interval training (SIT). Nineteen males performed a single SIT session, followed by one of two 15-min recovery conditions: cold-water immersion (COLD; 10°C) or a passive room-temperature control (CON; 23°C). Sixteen of these participants also completed six weeks SIT, each session followed immediately by their designated recovery condition...
July 5, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28674601/physiological-characteristics-of-projected-starters-and-non-starters-in-the-field-positions-from-a-division-i-women-s-soccer-team
#10
Fabrice G Risso, Farzad Jalilvand, Ashley J Orjalo, Matthew R Moreno, Deshaun L Davis, Samantha A Birmingham-Babauta, John J Stokes, Alyssa A Stage, Tricia M Liu, Dominic V Giuliano, Adrina Lazar, Robert G Lockie
NCAA soccer features different substitution rules compared to FIFA-sanctioned matches, with a greater availability of players who can enter the game. This could influence the physiological characteristics of the field position starters (ST) and non-starters (NST) within a collegiate women's team, which has not been previously analyzed. Thus, 22 field players from the same Division I women's soccer squad completed: vertical and standing broad jumps; 30-meter (m) sprint (0-5, 0-10, 0-30 m intervals); pro-agility and 60-yard shuttle; and the Yo-Yo Intermittent Recovery Test Level 1...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/28662108/short-term-adaptations-following-complex-training-in-team-sports-a-meta-analysis
#11
Tomás T Freitas, Alejandro Martinez-Rodriguez, Julio Calleja-González, Pedro E Alcaraz
OBJECTIVE: The purpose of this meta-analysis was to study the short-term adaptations on sprint and vertical jump (VJ) performance following Complex Training (CT) in team-sports. CT is a resistance training method aimed at developing both strength and power, which has a direct effect on sprint and VJ. It consists on alternating heavy resistance training exercises with plyometric/power ones, set for set, on the same workout. METHODS: A search of electronic databases up to July 2016 (PubMed-MEDLINE, SPORTDiscus, Web of Knowledge) was conducted...
2017: PloS One
https://www.readbyqxmd.com/read/28658072/the-nfl-combine-40-yard-dash-how-important-is-maximum-velocity
#12
Kenneth P Clark, Randall H Rieger, Richard F Bruno, David J Stearne
This investigation analyzed the sprint velocity profiles for athletes who completed the 40-yard (36.6m) dash at the 2016 NFL Combine. The purpose was to evaluate the relationship between maximum velocity and sprint performance, and to compare acceleration patterns for fast and slow athletes. Using freely available online sources, data were collected for body mass and sprint performance (36.6m time with split intervals at 9.1 and 18.3m). For each athlete, split times were utilized to generate modeled curves of distance vs...
June 22, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28633001/impact-of-4-weeks-of-interval-training-on-resting-metabolic-rate-fitness-and-health-related-outcomes
#13
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
#14
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/28620311/physiological-adaptations-to-hypoxic-vs-normoxic-training-during-intermittent-living-high
#15
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/28595870/high-speed-running-and-sprinting-as-an-injury-risk-factor-in-soccer-can-well-developed-physical-qualities-reduce-the-risk
#16
Shane Malone, Adam Owen, Bruno Mendes, Brian Hughes, Kieran Collins, Tim J Gabbett
OBJECTIVES: This study investigated the association between high-speed running (HSR) and sprint running (SR) and injuries within elite soccer players. The impact of intermittent aerobic fitness as measured by the end speed of the 30-15 intermittent fitness test (30-15VIFT) and high chronic workloads (average 21-day) as potential mediators of injury risk were also investigated. DESIGN: Observational Cohort Study. METHODS: 37 elite soccer players from one elite squad were involved in a one-season study...
May 25, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28546466/changes-in-brachial-artery-endothelial-function-and-resting-diameter-with-moderate-intensity-continuous-but-not-sprint-interval-training-in-sedentary-men
#17
Ninette Shenouda, Jenna B Gillen, Martin J Gibala, Maureen J MacDonald
Moderate-intensity continuous training (MICT) improves peripheral artery function in healthy adults, a phenomenon that reverses as continued training induces structural remodeling. Sprint interval training (SIT) elicits physiological adaptations similar to MICT despite a lower exercise volume and time-commitment; however, its effect on peripheral artery function and structure is largely unexplored. We compared peripheral artery responses to 12 weeks of MICT and SIT in sedentary, healthy men (age=27±8 years)...
May 25, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28513103/a-systematic-review-and-meta-analysis-of-interval-training-versus-moderate-intensity-continuous-training-on-body-adiposity
#18
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/28479931/cardiorespiratory-fitness-and-aerobic-performance-adaptations-to-a-4-week-sprint-interval-training-in-young-healthy-untrained-females
#19
Mykolas Kavaliauskas, Thomas P Steer, John A Babraj
PURPOSE: The aim of this study was to test the effects of sprint interval training (SIT) on cardiorespiratory fitness and aerobic performance measures in young females. METHODS: Eight healthy, untrained females (age 21 ± 1 years; height 165 ± 5 cm; body mass 63 ± 6 kg) completed cycling peak oxygen uptake ([Formula: see text] peak), 10-km cycling time trial (TT) and critical power (CP) tests pre- and post-SIT. SIT protocol included 4 × 30-s "all-out" cycling efforts against 7 % body mass interspersed with 4 min of active recovery performed twice per week for 4 weeks (eight sessions in total)...
2017: Sport Sciences for Health
https://www.readbyqxmd.com/read/28467942/sprinting-toward-fitness
#20
Martin J Gibala, John A Hawley
Intense intermittent exercise, or interval training, is a powerful stimulus to induce many of the physiological adaptations typically associated with traditional, moderate-intensity continuous training. While coaches and athletes have recognized the value of interval training to enhance performance for over a century, recent scientific interest has focused on the application of this training method for health promotion. Despite renewed attention, the mechanistic basis for the physiological remodeling that occurs after interval training and the role that the stochastic nature of this type of exercise plays in mediating adaptive responses remains to be elucidated...
May 2, 2017: Cell Metabolism
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