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https://www.readbyqxmd.com/read/29775989/higher-accuracy-of-the-lactate-minimum-test-compared-to-established-threshold-concepts-to-determine-maximal-lactate-steady-state-in-running
#1
Patrick Wahl, Lukas Zwingmann, Christian Manunzio, Jacob Wolf, Wilhelm Bloch
This study evaluated the accuracy of the lactate minimum test, in comparison to a graded-exercise test and established threshold concepts (OBLA and mDmax) to determine running speed at maximal lactate steady state. Eighteen subjects performed a lactate minimum test, a graded-exercise test (2.4 m·s-1 start,+0.4 m·s-1 every 5 min) and 2 or more constant-speed tests of 30 min to determine running speed at maximal lactate steady state. The lactate minimum test consisted of an initial lactate priming segment, followed by a short recovery phase...
May 18, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29769827/effects-of-a-4-week-very-low-carbohydrate-diet-on-high-intensity-interval-training-responses
#2
Lukas Cipryan, Daniel J Plews, Alessandro Ferretti, Phil B Maffetone, Paul B Laursen
The purpose of the study was to examine the effects of altering from habitual mixed Western-based (HD) to a very low-carbohydrate high-fat (VLCHF) diet over a 4-week timecourse on performance and physiological responses during high-intensity interval training (HIIT). Eighteen moderately trained males (age 23.8 ± 2.1 years) consuming their HD (48 ± 13% carbohydrate, 17 ± 3% protein, 35 ± 9% fat) were assigned to 2 groups. One group was asked to remain on their HD, while the other was asked to switch to a non-standardized VLCHF diet (8 ± 3% carbohydrate, 29 ± 15% protein, 63 ± 13% fat) for 4 weeks...
June 2018: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29764525/development-of-understanding-of-dohad-concepts-in-students-during-undergraduate-health-professional-programs-in-japan-and-new-zealand
#3
M Oyamada, A Lim, R Dixon, C Wall, J Bay
Evidence in support of the Developmental Origins of Health and Disease (DOHaD) hypothesis has reached the level where it can appropriately be used to inform practice. DOHaD informed interventions supporting primary noncommunicable disease risk reduction should target the pre- and periconceptional periods, pregnancy, lactation, childhood and adolescence. Such interventions are dependent on a health workforce (including dietitians, nurses, midwives, doctors, and nutrition teachers), that has a deep understanding of DOHaD concepts...
May 16, 2018: Journal of Developmental Origins of Health and Disease
https://www.readbyqxmd.com/read/29745772/specificity-elicits-higher-maximal-and-submaximal-cardiorespiratory-responses-during-a-new-taekwondo-aerobic-test
#4
Matheus Hausen, Pedro Paulo Soares, Marcus Paulo Araujo, Débora Esteves, Hilbert Julio, Roberto Tauil, Marcus Junca, Flávia Porto, Emerson Franchini, Craig Alan Bridge, Jonas Gurgel
PURPOSE: The purpose of the present study was to propose and validate new taekwondo-specific cardiopulmonary exercise tests. METHODS: Twelve male national-level taekwondo athletes (age 20 ± 2 yrs; body mass 67.5 ± 5.7 kg; height 175 ± 8 cm; training experience 7 ± 3 yrs) performed three separate exercise tests in a randomized counterbalanced order: 1) a Treadmill Running Cardiopulmonary Exercise Test (CPET); 2) Continuous and 3) Interval Taekwondo Cardiopulmonary Exercise Tests (cTKDet and iTKDet, respectively)...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29745765/is-the-functional-threshold-power-ftp-a-valid-surrogate-of-the-lactate-threshold
#5
Pedro L Valenzuela, Javier S Morales, Carl Foster, Alejandro Lucia, Pedro de la Villa
PURPOSE: This study aimed to analyze the relationship between the Functional Threshold Power (FTP) and the Lactate Threshold (LT). METHODS: 20 male cyclists performed an incremental test in which the LT was determined. At least 48 h later, they performed a 20-minute time trial and 95% of the mean power output (P20) was defined as FTP. Participants were divided into recreational (Peak Power Output [PPO] < 4.5 W∙kg-1 , n=11) or trained cyclists (PPO > 4.5 W∙kg-1 , n=9) according to their fitness status...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29743827/the-effect-of-carbohydrate-mouth-rinse-on-performance-biochemical-and-psychophysiological-variables-during-a-cycling-time-trial-a-crossover-randomized-trial
#6
Amanda M J Ferreira, Luiz F Farias-Junior, Thaynan A A Mota, Hassan M Elsangedy, Aline Marcadenti, Telma M A M Lemos, Alexandre H Okano, Ana P T Fayh
Background: The hypothesis of the central effect of carbohydrate mouth rinse (CMR) on performance improvement in a fed state has not been established, and its psychophysiological responses have not yet been described. The aim of this study was to evaluate the effect of CMR in athletes fed state on performance, biochemical and psychophysiological responses compared to ad libitum water intake. Methods: Eleven trained male cyclists completed a randomized, crossover trial, which consisted of a 30 km cycle ergometer at self-selected intensity and in a fed state...
2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29742746/comparison-of-psychological-and-physiological-responses-to-imposed-vs-self-selected-high-intensity-interval-training
#7
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
#8
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/29740015/effects-of-5-aminolevulinic-acid-supplementation-on-home-based-walking-training-achievement-in-middle-aged-depressive-women-randomized-double-blind-crossover-pilot-study
#9
Hiroshi Suzuki, Shizue Masuki, Akiyo Morikawa, Yu Ogawa, Yoshi-Ichiro Kamijo, Kiwamu Takahashi, Motowo Nakajima, Hiroshi Nose
Depressive patients often experience difficulty in performing exercise due to physical and psychological barriers. We examined the effects of 5-aminolevulinic acid (ALA) with sodium ferrous citrate (SFC) supplementation during home-based walking training in middle-aged depressive women. Nine outpatients [53 ± 8 (SD) yr] with major depressive disorder participated in the pilot study with randomized, placebo-controlled, double-blind crossover design. They underwent two trials for 7 days, each performing interval walking training (IWT) with ALA + SFC (ALA + SFC) or placebo supplement intake (PLC) intermittently with >a 10-day washout period...
May 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29727016/metabolic-stress-dependent-regulation-of-the-mitochondrial-biogenic-molecular-response-to-high-intensity-exercise-in-human-skeletal-muscle
#10
M Fiorenza, T P Gunnarsson, M Hostrup, F M Iaia, F Schena, H Pilegaard, J Bangsbo
KEY POINTS: Low-volume high-intensity exercise training promotes muscle mitochondrial adaptations that resemble the ones associated with high-volume moderate-intensity exercise training. These training-induced mitochondrial adaptations stem from the cumulative effects of transient transcriptional responses to each acute exercise bout. However, whether metabolic stress is a key mediator of the acute molecular responses to high-intensity exercise is still incompletely understood. Herein we show that, by comparing different work-matched low-volume high-intensity exercise protocols, more marked metabolic perturbations were associated with enhanced mitochondrial biogenesis-related muscle mRNA responses...
May 4, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29725246/dehydroepiandrosterone-supplementation-combined-with-weight-loading-whole-body-vibration-training-wwbv-affects-exercise-performance-and-muscle-glycogen-storage-in-middle-aged-c57bl-6-mice
#11
Yi-Ming Chen, Hao-Chieh Lee, Mu-Tsung Chen, Chi-Chang Huang, Wen-Chyuan Chen
Background : Adequate nutritional intake and an optimal training program are important elements of any strategy to preserve or increase muscle mass and strength during aging. Purpose : In the current study, we investigate the effects of Dehydroepiandrosterone (DHEA), one of the most abundant circulating steroids in humans and a precursor hormone, supplementation combined with a weight-loading whole-body vibration (WWBV) on exercise performance, physical fatigue-related biochemical responses and testosterone content in middle-aged 9 months old C57BL/6 mice...
2018: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/29722252/creatine-monohydrate-supplementation-during-eight-weeks-of-progressive-resistance-training-increases-strength-in-as-little-as-two-weeks-without-reducing-markers-of-muscle-damage
#12
Mojtaba Kaviani, Aboozar Abassi, Philip D Chilibeck
BACKGROUND: Creatine supplementation (Cr) increases strength during resistance training, but the time course of this strength increase is unclear. The aim was to determine the precise time course by which Cr could increase strength and whether Cr prevents muscle damage during eight weeks of resistance training. METHODS: Young males were randomized (double blind) to Cr (n=9, 0.07g/kg/d) and placebo (n=9) during 8-weeks of resistance training (3d/week). Strength was assessed across six exercises every two weeks...
May 2, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29720949/active-recovery-after-high-intensity-interval-training-does-not-attenuate-training-adaptation
#13
Thimo Wiewelhove, Christoph Schneider, Alina Schmidt, Alexander Döweling, Tim Meyer, Michael Kellmann, Mark Pfeiffer, Alexander Ferrauti
Objective: High-intensity interval training (HIIT) can be extremely demanding and can consequently produce high blood lactate levels. Previous studies have shown that lactate is a potent metabolic stimulus, which is important for adaptation. Active recovery (ACT) after intensive exercise, however, enhances blood lactate removal in comparison with passive recovery (PAS) and, consequently, may attenuate endurance performance improvements. Therefore, the aim of this study was to examine the influence of regular ACT on training adaptations during a HIIT mesocycle...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29719563/knowledge-of-and-attitudes-to-giving-expressed-breastmilk-to-infants-in-rural-coastal-kenya-focus-group-discussions-of-first-time-mothers-and-their-advisers
#14
Alison W Talbert, Benjamin Tsofa, Edward Mumbo, James A Berkley, Martha Mwangome
Background: The World Health Organization (WHO)/UNICEF Baby-Friendly Hospital Initiative step number five of the "Ten steps to successful breastfeeding" states "Show mothers how to breastfeed and how to maintain lactation even if they should be separated from their infants." Urban mothers in Nairobi have low rates of exclusive breastfeeding after returning to work but there are no published data on rural Kenya mothers' infant feeding practices when working or schooling away from home...
2018: International Breastfeeding Journal
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
#15
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/29719513/adaptive-changes-after-2-weeks-of-10-s-sprint-interval-training-with-various-recovery-times
#16
Robert A Olek, Sylwester Kujach, Ewa Ziemann, Wieslaw Ziolkowski, Piotr Waz, Radoslaw Laskowski
Purpose: The aim of this study was to compare the effect of applying two different rest recovery times in a 10-s sprint interval training session on aerobic and anaerobic capacities as well as skeletal muscle enzyme activities. Methods: Fourteen physically active but not highly trained male subjects (mean maximal oxygen uptake 50.5 ± 1.0 mlO2 ·kg-1 ·min-1 ) participated in the study. The training protocol involved a series of 10-s sprints separated by either 1-min (SIT10:1) or 4-min (SIT10:4) of recovery...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29719312/contrast-agents-and-observing-patient-safety-programs-in-radiology-departments-in-kermanshah-province-hospitals-in-west-of-iran
#17
Fatemhe Amiri, Mohammad Rasoul Tohidnia, Somayeh Haydarizadi, Rasool Azmoonfar
Introduction: Contrast agents play an important role in increasing the efficiency of diagnostic imaging techniques in the evaluation of vascular lesions, infections and tumors. Annually more than 70 million radiology tests performed using contrast agent materials in the world. Side effects of contrast agent can belief-threaten, so that observing safety guideline prescribed a key role in the patient's health. Aim: The aim of this study was evaluation of compliance with the instructions in the use of contrast agent materials in Kermanshah province Hospitals, West in Iran...
2018: Acta Informatica Medica: AIM
https://www.readbyqxmd.com/read/29709584/resuscitative-endovascular-balloon-occlusion-of-the-aorta-implementation-and-preliminary-results-at-an-academic-level-i-trauma-center
#18
Marcus D Darrabie, Chasen A Croft, Scott C Brakenridge, Alicia M Mohr, Martin A Rosenthal, Frederick A Moore, R Stephen Smith
BACKGROUND: REBOA is a novel method of controlling subdiaphragmatic hemorrhage while improving hemodynamic stability. This procedure achieves many of the goals of resuscitative thoracotomy (RT), but is less invasive. Herein, we present the initial experience with REBOA at a level 1 academic trauma center. STUDY DESIGN: A retrospective review was performed. Orientation of surgeons and residents to REBOA was accomplished by an educational program including a hands-on simulation session (1...
April 11, 2018: Journal of the American College of Surgeons
https://www.readbyqxmd.com/read/29699892/primary-mutational-landscape-linked-with-pre-docetaxel-lactate-dehydrogenase-levels-predicts-docetaxel-response-in-metastatic-castrate-resistant-prostate-cancer
#19
Kenneth Hiew, Claire A Hart, Adnan Ali, Tony Elliott, Vijay Ramani, Vijay Sangar, Maurice Lau, Satish Maddineni, Mick Brown, Noel Clarke
BACKGROUND: Docetaxel chemotherapy is a standard of care for metastatic castrate-resistant prostate cancer (mCRPC): 40-50% of patients achieve a biochemical response. However, there is a lack of response predictive biomarkers. OBJECTIVE: To assess lactate dehydrogenase (LDH) as a docetaxel response biomarker in mCRPC and to examine the association of LDH with genomic alterations in primary diagnostic biopsies. DESIGN, SETTING, AND PARTICIPANTS: Clinical and associated primary tumour-targeted next-generation sequencing data from matched training (n=150) and test (n=120) cohorts of progressive mCRPC patients receiving docetaxel therapy were analysed...
April 23, 2018: European Urology Focus
https://www.readbyqxmd.com/read/29698994/validity-of-a-basketball-specific-complex-test-in-female-professional-players
#20
René Schwesig, Souhail Hermassi, Andreas Lauenroth, Kevin Laudner, Alexander Koke, Thomas Bartels, Stefan Delank, Stephan Schulze
The purpose of this study was to assess the validity of a new basketball-specific complex test (BBCT) based on the ascertained match performance.Fourteen female professional basketball players (ages: 23.4 ± 1.8 years) performed the BBCT and a treadmill test (TT) at the beginning of pre-season training. Lactate, heart rate (HR), time, shooting precision and number of errors were measured during the four test sequences of the BBCT (short distance sprinting with direction changes, with and without a ball; fast break; lay-up parcours; sprint endurance test)...
April 26, 2018: Sportverletzung Sportschaden: Organ der Gesellschaft Für Orthopädisch-Traumatologische Sportmedizin
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