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https://www.readbyqxmd.com/read/29769816/the-effect-of-two-different-concurrent-training-programs-on-strength-and-power-gains-in-highly-trained-individuals
#1
Henrik Petré, Pontus Löfving, Niklas Psilander
The effects of concurrent strength and endurance training have been well studied in untrained and moderately-trained individuals. However, studies examining these effects in individuals with a long history of resistance training (RT) are lacking. Additionally, few studies have examined how strength and power are affected when different types of endurance training are added to an RT protocol. The purpose of the present study was to compare the effects of concurrent training incorporating either low-volume, high-intensity interval training (HIIT, 8-24 Tabata intervals at ~150% of VO2max ) or high-volume, medium-intensity continuous endurance training (CT, 40-80 min at 70% of VO2max ), on the strength and power of highly-trained individuals...
June 2018: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29762196/high-intensity-interval-training-and-continuous-aerobic-exercise-interventions-to-promote-self-initiated-quit-attempts-in-young-adults-who-smoke-feasibility-acceptability-and-lessons-learned-from-a-randomized-pilot-trial
#2
Alicia Allen, Samantha C Carlson, Tyler A Bosch, Lynn E Eberly, Kola Okuyemi, Uma Nair, Judith S Gordon
OBJECTIVES: While exercise significantly reduces craving for cigarettes, the effect of exercise on self-initiation of quit attempts is less known. Therefore, this randomized pilot study explored the effect of starting an exercise program on self-initiated quit attempts, and also the feasibility and acceptability of a novel exercise intervention, high-intensity interval training (HIIT), as compared with a more traditional continuous aerobic (CA) exercise intervention. METHODS: Participants smoked (≥5 cigarettes/d), were aged 18 to 40 years, and wanted to increase their exercise...
May 14, 2018: Journal of Addiction Medicine
https://www.readbyqxmd.com/read/29742746/comparison-of-psychological-and-physiological-responses-to-imposed-vs-self-selected-high-intensity-interval-training
#3
Erin Kellogg, Cheyann Cantacessi, Olivia McNamer, Heather Holmes, Robert von Bargen, Richard Ramirez, Daren Gallagher, Stacy Vargas, Ben Santia, Karen Rodriguez, Todd A Astorino
Kellogg, E, Cantacessi, C, McNamer, O, Holmes, H, von Bargen, R, Ramirez, R, Gallagher, D, Vargas, S, Santia, B, Rodriguez, K, and Astorino, TA. Comparison of psychological and physiological responses to imposed vs. self-selected high-intensity interval training. J Strength Cond Res XX(X): 000-000, 2018-High-intensity interval training elicits similar physiological adaptations as moderate intensity continuous training (MICT). Some studies report greater enjoyment to a bout of high-intensity interval exercise (HIIE) vs...
May 8, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29740332/metabolic-and-fatigue-profiles-are-comparable-between-prepubertal-children-and-well-trained-adult-endurance-athletes
#4
Anthony Birat, Pierre Bourdier, Enzo Piponnier, Anthony J Blazevich, Hugo Maciejewski, Pascale Duché, Sébastien Ratel
The aim of this study was to determine whether prepubertal children are metabolically comparable to well-trained adult endurance athletes and if this translates into similar fatigue rates during high-intensity exercise in both populations. On two different occasions, 12 prepubertal boys (10.5 ± 1.1 y), 12 untrained men (21.2 ± 1.5 y), and 13 endurance male athletes (21.5 ± 2.7 y) completed an incremental test to determine the power output at VO2max (PVO2max ) and a Wingate test to evaluate the maximal anaerobic power (Pmax ) and relative decrement in power output (i...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29730785/may-the-force-be-with-you-why-resistance-training-is-essential-for-subjects-with-type-2-diabetes-mellitus-without-complications
#5
REVIEW
Roberto Codella, Marta Ialacqua, Ileana Terruzzi, Livio Luzi
Physical activity, together with diet and pharmacological therapy, represents one of the three cornerstones in type 2 diabetes mellitus treatment and care. The therapeutic appeal of regular physical activity stems from: (i) its non-pharmacological nature; (ii) its beneficial effects on the metabolic risk factors associated with diabetes complications; (iii) its low costs. Evidence accumulated in the last years suggests that aerobic training-endurance training-constitutes a safe modality of intervention, achievable, and effective in diabetes treatment, whenever it is not limited by comorbidities...
May 5, 2018: Endocrine
https://www.readbyqxmd.com/read/29719514/longer-work-rest-intervals-during-high-intensity-interval-training-hiit-lead-to-elevated-levels-of-mir-222-and-mir-29c
#6
Boris Schmitz, Florian Rolfes, Katrin Schelleckes, Mirja Mewes, Lothar Thorwesten, Michael Krüger, Andreas Klose, Stefan-Martin Brand
Aim: MicroRNA-222 (miR-222) and miR-29c have been identified as important modulators of cardiac growth and may protect against pathological cardiac remodeling. miR-222 and -29c may thus serve as functional biomarkers for exercise-induced cardiac adaptations. This investigation compared the effect of two workload-matched high-intensity interval training (HIIT) protocols with different recovery periods on miR-222 and -29c levels. Methods: Sixty-three moderately trained females and males (22.0 ± 1.7 years) fulfilled the eligibility criteria and were randomized into two HIIT groups using sex and exercise capacity...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29706822/high-intensity-sport-specific-cardiac-rehabilitation-training-of-a-22-year-old-competitive-cyclist-after-spontaneous-coronary-artery-dissection
#7
Nicholas Weber, Adam Weber, Pasquale Carbone, Anne Lawrence, Tim Bilbrey, Jeffrey M Schussler, Jenny Adams
A 22-year-old man with spontaneous coronary artery dissection wanted to assess the feasibility of returning to competitive cycling. He was referred to the cardiac rehabilitation (CR) program at Baylor Hamilton Heart and Vascular Hospital where staff designed a high-intensity, sport-specific training program that simulated the movements and forces associated with his goal activity. The program was symptom limited and enabled the patient to train earlier and at a higher intensity than is typically allowed in conventional CR programs...
April 2018: Proceedings of the Baylor University Medical Center
https://www.readbyqxmd.com/read/29703254/evaluation-of-a-novel-vital-sign-device-to-reduce-maternal-mortality-and-morbidity-in-low-resource-settings-a-mixed-method-feasibility-study-for-the-cradle-3-trial
#8
Nicola Vousden, Elodie Lawley, Hannah L Nathan, Paul T Seed, Adrian Brown, Tafadzwa Muchengwa, Umesh Charantimath, Mrutyunjaya Bellad, Muchabayiwa Francis Gidiri, Shivaprasad Goudar, Lucy C Chappell, Jane Sandall, Andrew H Shennan
BACKGROUND: The CRADLE-3 trial is a stepped-wedge randomised controlled trial aiming to reduce maternal mortality and morbidity by implementing a novel vital sign device (CRADLE Vital Sign Alert) and training package into routine maternity care in 10 low-income sites. The MRC Guidance on complex interventions proposes that interventions and implementation strategies be shaped by early phase piloting and development work. We present the findings of a three-month mixed-methodology feasibility study for this trial, describe how this was informed by the MRC guidance and the study design was refined...
April 27, 2018: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/29701444/hiit-produces-increases-in-muscle-power-and-free-testosterone-in-male-masters-athletes
#9
P Herbert, L D Hayes, N F Sculthorpe, F M Grace
High-intensity interval training (HIIT) improves peak power output (PPO) in sedentary aging men but has not been examined in masters endurance athletes. Therefore, we investigated whether a six-week program of low-volume HIIT would (i) improve PPO in masters athletes and (ii) whether any change in PPO would be associated with steroid hormone perturbations. Seventeen male masters athletes (60 ± 5 years) completed the intervention, which comprised nine HIIT sessions over six weeks. HIIT sessions involved six 30-s sprints at 40% PPO, interspersed with 3 min active recovery...
October 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29697296/the-physical-profile-of-adult-male-basketball-players-differences-between-competitive-levels-and-playing-positions
#10
Davide Ferioli, Ermanno Rampinini, Andrea Bosio, Antonio La Torre, Matteo Azzolini, Aaron J Coutts
This study examined the physical differences in adult male basketball players of different competitive level and playing position using a large cohort. In the middle of the regular season, 129 players from four different Divisions completed a Yo-YoIR1 and, after 3-to-8 days, they performed a 6-min continuous running test (Mognoni's test), a counter-movement jump (CMJ) test and a 5-min High-intensity Intermittent running test (HIT). Magnitude-based inferences revealed that differences in HIT were very likely moderate between Division I and II and likely small between Division II and III...
April 26, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29689096/improving-temporal-accuracy-of-human-metabolic-chambers-for-dynamic-metabolic-studies
#11
Shanshan Chen, Erica Wohlers, Eric Ruud, Jon Moon, Bin Ni, Francesco S Celi
Metabolic chambers are powerful tools for assessing human energy expenditure, providing flexibility and comfort for the subjects in a near free-living environment. However, the flexibility offered by the large living room size creates challenges in the assessment of dynamic human metabolic signals-such as those generated during high-intensity interval training and short-term involuntary physical activities-with sufficient temporal accuracy. Therefore, this paper presents methods to improve the temporal accuracy of metabolic chambers...
2018: PloS One
https://www.readbyqxmd.com/read/29687266/physiological-and-psychological-determinants-of-whole-body-endurance-exercise-following-short-term-sustained-operations-with-partial-sleep-deprivation
#12
Michail E Keramidas, Magnus Gadefors, Lars-Ove Nilsson, Ola Eiken
PURPOSE: The study examined the effects of short-term field-based military training with partial sleep deprivation on whole-body endurance performance in well-trained individuals. METHODS: Before and after a 2-day sustained operations (SUSOPS), 14 cadets performed a 15-min constant-load cycling at 65% of peak power output (PPO; CLT65 ), followed by an exhaustive constant-load trial at 85% of PPO (CLT85 ). Physiological [oxygen uptake ([Formula: see text]O2 ), heart rate (HR), mean arterial pressure (MAP), cardiac output (CO), and regional oxygenation (TOI) in the frontal cerebral cortex and vastus lateralis muscle] and psychological [effort perception (RPE), affective valence (FS), and perceived activation (FAS)] variables were monitored during exercise...
April 23, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29672229/the-effects-of-mild-hypothermia-on-self-paced-exercise-performance
#13
Steven A H Ferguson, Neil Derek Eves, Brian D Roy, Gary J Hodges, Stephen S Cheung
This study examined self-paced, high-intensity exercise during mild hypothermia and whether hyperoxia may offset any potential impairment. Twelve trained males each completed 15 km time trials in three environmental conditions: Neutral (23{degree sign}C, Fi O2 : 0.21), Cold (0{degree sign}C, Fi O2 : 0.21), and Cold+Hyper (0{degree sign}C, Fi O2 : 0.40). Cold and Cold+Hyper trials occurred after a 0.5{degree sign}C drop in rectal temperature. Rectal temperature was higher (p{less than or equal to}0.016) throughout Neutral compared to Cold and Cold+Hyper; Cold had a higher (p{less than or equal to}0...
April 19, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29650336/acute-physiological-responses-to-low-intensity-blood-flow-restriction-cycling
#14
H J Thomas, B R Scott, J J Peiffer
OBJECTIVES: Blood flow restriction (BFR) during interval cycling may stimulate aerobic and anaerobic adaptations. However, acute physiological responses to BFR interval cycling have not been extensively investigated. DESIGN: Eighteen males completed low-intensity (LI), low-intensity with BFR (LIBFR ) and high-intensity (HI) interval cycling sessions in randomised and counterbalanced order. These included a standardised warm-up and three two-min intervals interspersed with two-min recovery...
April 9, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29619799/low-carbohydrate-ketogenic-diet-impairs-anaerobic-exercise-performance-in-exercise-trained-women-and-men-a-randomized-sequence-crossover-trial
#15
Kymberly A Wroble, Morgan N Trott, George G Schweitzer, Rabia S Rahman, Patrick V Kelly, Edward P Weiss
BACKGROUND: Low-carbohydrate, ketogenic diets cause mild, sub-clinical systemic acidosis. Anaerobic exercise performance is limited by acidosis. Therefore, we evaluated the hypothesis that a low-carbohydrate, ketogenic diet impairs anaerobic exercise performance, as compared to a high-carbohydrate diet. METHODS: Sixteen men and women (BMI, 23±1 kg/m2, age 23±1 yr) participated in a randomized-sequence, counterbalanced crossover study in which they underwent exercise testing after four days of either a low-carbohydrate, ketogenic diet (LC; <50 g/day and <10% of energy from carbohydrates) or a high-carbohydrate diet (HC; 6-10 g/kg/day carbohydrate)...
April 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29619796/overnight-fasting-compromises-exercise-intensity-and-volume-during-sprint-interval-training-but-improves-high-intensity-aerobic-endurance
#16
Tasuku Terada, Saeed R Toghi Eshghi, Yilina Liubaoerjijin, Michael Kennedy, Etienne Myette-Côté, Kevin Fletcher, Normand G Boulé
BACKGROUND: The combined effects of sprint interval training (SIT) and exercising in the fasted state are unknown. We compared the effects of SIT with exogenous carbohydrate supplementation (SITCHO) and SIT following overnight fast (SITFast) on aerobic capacity (peak oxygen consumption: V̇ O2peak) and high-intensity aerobic endurance (time-to-exhaustion at 85% V̇ O2peak [T85%]). METHODS: Twenty male cyclists were randomized to SITCHO and SITFast. Both groups performed 30-second all-out cycling followed by 4-minute active recovery 3 times per week for 4 weeks, with the number of sprint bouts progressing from 4 to 7...
April 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29557839/functional-anaerobic-and-strength-training-in-young-adults-with-cerebral-palsy
#17
Jarred G Gillett, Glen A Lichtwark, Roslyn N Boyd, Lee A Barber
PURPOSE: To investigate the efficacy of a 12-week combined functional anaerobic and strength training program on neuromuscular properties and functional capacity in young adults with spastic-type CP. METHODS: 17 young adults (21±4 years, 9 males, GMFCS I=11, II=6) were randomized to 12 weeks, 3 sessions per week, of high intensity functional anaerobic and progressive resistance training of the lower limbs (n=8), or a waitlist control group (n=9). Pre- and post-training plantar flexor and tibialis anterior muscle volumes and composition, passive and active plantar flexor muscle properties, and functional capacity outcomes were assessed...
March 20, 2018: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29541136/physical-and-physiological-demands-of-futsal
#18
REVIEW
Naser Naser, Ajmol Ali, Paul Macadam
Futsal, the 5-a-side version of soccer (i.e. 1 goalkeeper and 4 outfield players), was introduced in 1930 and continues to grow in popularity around the world. Competitive games comprise of two 20-min periods of high-intensity and intermittent activities requiring substantial physical, tactical, and technical efforts from the players. A greater understanding of the physical and skill requirements will aid the development of futsal and enable practitioners to undertake appropriate training regimes for the demands of the sport...
December 2017: Journal of Exercise Science and Fitness
https://www.readbyqxmd.com/read/29484358/high-intensity-multimodal-resistance-training-improves-muscle-function-symmetry-during-a-sit-to-stand-task-and-physical-function-following-hip-fracture
#19
R A Briggs, J R Houck, P C LaStayo, J M Fritz, M J Drummond, R L Marcus
OBJECTIVES: Post rehabilitation, older adults with hip fracture display low vertical ground reaction force (vGRF) on the involved lower extremity during a sit-to-stand task and low physical function. The purpose of this study was to test whether muscle performance, involved side vGRF during a sit-to-stand task, and physical function improved following multimodal high-intensity resistance training, when initiated after usual care (2 to 6 months after hip fracture). DESIGN: Case series study, 12 weeks extended high-intensity strength training intervention following hip fracture...
2018: Journal of Nutrition, Health & Aging
https://www.readbyqxmd.com/read/29469835/design-of-a-high-efficiency-train-headlamp-with-low-power-consumption-using-dual-half-parabolic-aluminized-reflectors
#20
Wei-Lun Liang, Guo-Dung J Su
We propose a train headlamp system using dual half-circular parabolic aluminized reflectors. Each half-circular reflector contains five high-efficiency and small-package light-emitting diode (LED) chips, and the halves are 180° rotationally symmetric. For traffic safety, the headlamp satisfies the Code of Federal Regulations. To predict the pattern of illumination, an analytical derivation is developed for the optical path of a ray that is perpendicular to and emitted from the center of an LED chip. This ray represents the main ray emitted from the LED chip and is located at the maximum illuminance of the spot projected by the LED source onto a screen...
February 20, 2018: Applied Optics
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