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https://www.readbyqxmd.com/read/28636453/testing-the-efficacy-of-existing-force-endurance-models-to-account-for-the-prevalence-of-obesity-in-the-workforce
#1
Mojdeh Pajoutan, Lora A Cavuoto, Ranjana K Mehta
This study evaluated whether the existing force-endurance relationship models are predictive of endurance time for overweight and obese individuals, and if not, provide revised models that can be applied for ergonomics practice. Data was collected from 141 participants (49 normal weight, 50 overweight, 42 obese) who each performed isometric endurance tasks of hand grip, shoulder flexion, and trunk extension at four levels of relative workload. Subject-specific fatigue rates and a general model of the force-endurance relationship were determined and compared to two fatigue models from the literature...
June 21, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28633685/cross-validation-analysis-for-genetic-evaluation-models-for-ranking-in-endurance-horses
#2
S García-Ballesteros, L Varona, M Valera, J P Gutiérrez, I Cervantes
Ranking trait was used as a selection criterion for competition horses to estimate racing performance. In the literature the most common approaches to estimate breeding values are the linear or threshold statistical models. However, recent studies have shown that a Thurstonian approach was able to fix the race effect (competitive level of the horses that participate in the same race), thus suggesting a better prediction accuracy of breeding values for ranking trait. The aim of this study was to compare the predictability of linear, threshold and Thurstonian approaches for genetic evaluation of ranking in endurance horses...
June 21, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28633669/impact-of-exercise-programs-among-helicopter-pilots-with-transient-lbp
#3
Knut Andersen, Roald Baardsen, Ingvild Dalen, Jan Petter Larsen
BACKGROUND: Flight related low back pain (LBP) among helicopter pilots is frequent and may influence flight performance. Prolonged confined sitting during flights seems to weaken lumbar trunk (LT) muscles with associated secondary transient pain. Aim of the study was to investigate if structured training could improve muscular function and thus improve LBP related to flying. METHODS: 39 helicopter pilots (35 men and 4 women), who reported flying related LBP on at least 1 of 3 missions last month, were allocated to two training programs over a 3-month period...
June 20, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28633487/high-intensity-interval-training-hiit-improves-physical-performance-and-frailty-in-aged-mice
#4
Kenneth Ladd Seldeen, Ginger Lasky, Merced Maria Leiker, Manhui Pang, Kirkwood Ely Personius, Bruce Robert Troen
Sarcopenia and frailty are highly prevalent in older individuals, increasing the risk of disability and loss of independence. High intensity interval training (HIIT) may provide a robust intervention for both sarcopenia and frailty by achieving both strength and endurance benefits with lower time commitments than other exercise regimens. To better understand the impacts of HIIT during aging, we compared 24-month-old C57BL/6J sedentary mice with those that were administered 10-minute uphill treadmill HIIT sessions three times per week over 16 weeks...
June 17, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28632066/differences-in-trunk-and-thigh-muscle-strength-endurance-and-thickness-between-elite-sailors-and-non-sailors
#5
Bernd Friesenbichler, Julia F Item-Glatthorn, Fabian Neunstöcklin, Nicola C Casartelli, Gaël Guilhem, Nicola A Maffiuletti
Dinghy sailors lean their upper body over the windward side of the boat ('hiking') to keep the boat's balance and maximise its speed. Sustaining the hiking position is essential for competitive performance and this study examined sport-specific differences of muscles relevant for hiking in elite sailors. Knee extensor muscle strength as well as trunk muscle strength, muscle endurance and muscle thickness were assessed in elite dinghy sailors (n = 15) and compared to matched, non-sailing controls (n = 15)...
March 1, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28631582/effect-of-green-tea-extract-supplementation-on-glycogen-replenishment-in-exercised-human-skeletal-muscle
#6
Tsen-Wei Tsai, Chia-Chen Chang, Su-Fen Liao, Yi-Hung Liao, Chien-Wen Hou, Jung-Piao Tsao, I-Shiung Cheng
The purpose of this study was to investigate the effects of 8-week green tea extract (GTE) supplementation on promoting postexercise muscle glycogen resynthesis and systemic energy substrate utilisation in young college students. A total of eight healthy male participants (age: 22·0 (se 1·0) years, BMI: 24·2 (se 0·7) kg/m2, VO2max: 43·2 (se 2·4) ml/kg per min) participated in this study. GTE (500 mg/d for 8 weeks) was compared with placebo in participants in a double-blind/placebo-controlled and crossover study design with an 8-week washout period...
June 20, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28630897/flexible-and-stretchable-power-sources-for-wearable-electronics
#7
Alla M Zamarayeva, Aminy E Ostfeld, Michael Wang, Jerica K Duey, Igal Deckman, Balthazar P Lechêne, Greg Davies, Daniel A Steingart, Ana Claudia Arias
Flexible and stretchable power sources represent a key technology for the realization of wearable electronics. Developing flexible and stretchable batteries with mechanical endurance that is on par with commercial standards and offer compliance while retaining safety remains a significant challenge. We present a unique approach that demonstrates mechanically robust, intrinsically safe silver-zinc batteries. This approach uses current collectors with enhanced mechanical design, such as helical springs and serpentines, as a structural support and backbone for all battery components...
June 2017: Science Advances
https://www.readbyqxmd.com/read/28630581/5000-meter-run-performance-is-not-enhanced-24-hrs-after-an-intense-exercise-bout-and-cold-water-immersion
#8
Mary C Stenson, Matthew R Stenson, Tracey D Matthews, Vincent J Paolone
Cold water immersion (CWI) is used by endurance athletes to speed recovery between exercise bouts, but little evidence is available on the effects of CWI on subsequent endurance performance. The purpose of this study was to investigate the effects of CWI following an acute bout of interval training on 5000 m run performance 24 hrs after interval training, perceived muscle soreness (PMS), range of motion (ROM), thigh circumference (TC), and perceived exertion (RPE). Nine endurance-trained males completed 2 trials, each consisting of an interval training session of 8 repetitions of 1200 m at a running pace equal to 75% of VO2peak, either a control or CWI treatment, and a timed 5000 m run 24 hrs post interval training session...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28630575/acute-and-post-exercise-physiological-responses-to-high-intensity-interval-training-in-endurance-and-sprint-athletes
#9
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/28628396/differential-in-maximal-aerobic-capacity-by-sex-in-collegiate-endurance-athletes-consuming-a-marginally-low-carbohydrate-diet
#10
Marissa N Baranauskas, Brian Miller, Jordan T Olson, Michelle Boltz, Laura Richardson, Matthew Juravich, Ronald Otterstetter
PURPOSE: Although current sports nutrition recommendations advocate for a high carbohydrate (CHO) intake among endurance athletes, recent research has suggested that training with low CHO availability may augment adaptations to aerobic training. The purpose of this study was to observe the dietary habits of collegiate distance runners and to investigate the effects of habitual CHO intake on aerobic performance [VO2max(post)] during a competitive season. METHODS: During an 8-week trial period, 12 (N = 12) collegiate track athletes recorded their self-selected dietary intake via 24-hour recall...
June 19, 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28627878/tilted-two-dimensional-array-multi-focus-confocal-raman-microspectroscopy
#11
Sohshi Yabumoto, Hiro-O Hamaguchi
A simple and efficient two-dimensional multi-focus confocal Raman microspectroscopy featuring the tilted-array technique is demonstrated. Raman scattering from a 4×4 square foci array passing through a 4×4 confocal pinhole array is tilted with a periscope. The tilted array of Raman scattering signals is dispersed by an imaging spectrograph onto a CCD detector, giving 16 independent Raman spectra formed as 16 bands with different heights on the sensor. Use of a state-of-the-art imaging spectrograph enables high-precision wavenumber duplicability of the 16 spectra...
June 19, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28627718/motor-performance-in-children-with-noonan-syndrome
#12
Ellen A Croonen, Marlou Essink, Ineke van der Burgt, Jos M Draaisma, Cees Noordam, Maria W G Nijhuis-van der Sanden
Although problems with motor performance in daily life are frequently mentioned in Noonan syndrome, the motor performance profile has never been systematically investigated. The aim of this study was to examine whether a specific profile in motor performance in children with Noonan syndrome was seen using valid norm-referenced tests. The study assessed motor performance in 19 children with Noonan syndrome (12 females, mean age 9 years 4 months, range 6 years 1 month to 11 years and 11 months, SDS 1 year and 11 months)...
June 19, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28626339/effects-of-2-week-intermittent-training-in-hypobaric-hypoxia-on-the-aerobic-energy-metabolism-and-performance-of-cycling-athletes-with-disabilities
#13
Sang-Hoon Kim, Ho-Jung An, Jung-Hyun Choi, Yong-Youn Kim
[Purpose] The present study aimed at examining changes in aerobic energy metabolism and performance in cycling athletes after 2 weeks of intermittent training in a multistep hypobaric hypoxia environment. [Subjects and Methods] We also aimed at using the findings to propose an efficient training program in hypobaric hypoxia for endurance athletes with disabilities. The study participants were three cycling athletes with physical disabilities from the Korean national team (A, B, and C athletes). They underwent complex (repetition, interval, and continued) training with a roller-type cycle in a multistep hypobaric hypoxia environment (simulated altitude, 4,000 m above sea level)...
June 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28626143/effect-of-conjugated-linoleic-acid-intake-on-endurance-exercise-performance-and-anti-fatigue-in-student-athletes
#14
Naoko Terasawa, Ken Okamoto, Kenta Nakada, Kazumi Masuda
Conjugated linoleic acids (CLA) intake has been reported to reduce body fat mass or increase lean body mass and to improve exercise outcome by modulating testosterone in humans. These reports have studied mostly overweight subjects; few were athletes. Therefore, in this study, the effect of CLA intake on endurance performance and anti-fatigue in student athletes was investigated. A double-blind, crossover study was conducted with 10 male student athletes. Each subject was administered with either CLA (net 0...
June 13, 2017: Journal of Oleo Science
https://www.readbyqxmd.com/read/28625189/influence-of-early-maladaptive-schemas-depression-and-anxiety-on-the-intensity-of-self-reported-cognitive-complaint-in-older-adults-with-subjective-cognitive-decline
#15
Caroline Tandetnik, Thierry Hergueta, Philippe Bonnet, Bruno Dubois, Catherine Bungener
BACKGROUND: Subjective cognitive decline (SCD) designates a self-reported cognitive decline despite preserved cognitive abilities. This study aims to explore, in older adults with SCD, the association between intensity of self-reported cognitive complaint and psychological factors including Young's early maladaptive schemas (EMSs) (i.e. enduring cognitive structures giving rise to beliefs about oneself and the world), as well as depression and anxiety. METHODS: Seventy-six subjects (69...
June 19, 2017: International Psychogeriatrics
https://www.readbyqxmd.com/read/28620483/utilisation-of-supplemented-l-carnitine-for-fuel-efficiency-as-an-antioxidant-and-for-muscle-recovery-in-labrador-retrievers
#16
Jessica L Varney, J W Fowler, W C Gilbert, C N Coon
The primary goal was to investigate the effects of l-carnitine on fuel efficiency, as an antioxidant, and for muscle recovery in Labrador retrievers. Dogs were split into two groups, with one group being supplemented with 250 mg/d of Carniking™ l-carnitine powder. Two experiments (Expt 1 and Expt 2) were performed over a 2-year period which included running programmes, activity monitoring, body composition scans and evaluation of recovery using biomarkers. Each experiment differed slightly in dog number and design: fifty-six v...
2017: Journal of Nutritional Science
https://www.readbyqxmd.com/read/28620308/the-effect-of-interdialytic-combined-resistance-and-aerobic-exercise-training-on-health-related-outcomes-in-chronic-hemodialysis-patients-the-tunisian-randomized-controlled-study
#17
Bechir Frih, Hamdi Jaafar, Wajdi Mkacher, Zohra Ben Salah, Mohamed Hammami, Ameur Frih
Background: Tunisia has the highest prevalence of hemodialysis patients compared to the other countries in North Africa. Dialysis centers rarely offer an exercise program to prevent physiological and psychological dialysis therapy-related alterations in chronic hemodialysis patients. Aim: To examine the effect of combined endurance-resistance training program on physiological and psychological outcomes in patients undergoing hemodialysis. Methods: We designed a single blinded, randomized, controlled study for a period of 4 months...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28620055/the-effects-of-rsr13-on-microvascular-po2-kinetics-and-muscle-contractile-performance-in-the-rat-arterial-ligation-model-of-peripheral-arterial-disease
#18
Aiko Watanabe, David C Poole, Yutaka Kano
Exercise intolerance and claudication are symptomatic of peripheral arterial disease. There is a close relationship between muscle O2 delivery, microvascular oxygen partial pressure (PmvO2) and contractile performance. We therefore hypothesized that a reduction of hemoglobin-oxygen affinity via RSR13 would maintain a higher PmvO2 and enhance blood-muscle O2 transport and contractile function. In male Wistar rats we created hindlimb ischemia via right side iliac artery ligation (AL). The contralateral (left) muscle served as control (CONT)...
June 15, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28619429/vitamin-d-and-multiple-sclerosis-an-update
#19
REVIEW
Charles Pierrot-Deseilligny, Jean-Claude Souberbielle
The most recent findings linking exposure to sun and vitamin D insufficiency to multiple sclerosis (MS) are reviewed. Due to insufficient sunshine and changing lifestyles, hypovitaminosis D is widespread in temperate countries. Numerous epidemiological studies have strongly suggested that sunshine and vitamin D insufficiency contributes to MS risk in these countries. Moreover, several large genetic studies in MS patients have recently stated unequivocally that diverse abnormalities involving vitamin D metabolism are related to the risk of the disease...
May 2017: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/28617846/a-metabolite-of-leucine-%C3%AE-hydroxy-%C3%AE-methylbutyrate-given-to-sows-during-pregnancy-alters-bone-development-of-their-newborn-offspring-by-hormonal-modulation
#20
Tomasz Blicharski, Ewa Tomaszewska, Piotr Dobrowolski, Monika Hułas-Stasiak, Siemowit Muszyński
The effects of dietary β-hydroxy-β-methylbutyrate (HMB) supplementation during gestation on bone, growth plate, and articular cartilage in newborns were determined. Thermal analysis of articular cartilage was performed to examine the structural changes in collagen. At day 70 of gestation, a total of 12 sows (Large White Polish breed, at the second parity) were randomly assigned to two groups, with each group receiving either a basal diet or the same diet supplemented with 0.2 g/day HMB until the 90th day...
2017: PloS One
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