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https://www.readbyqxmd.com/read/28524725/a-sport-education-fitness-season-s-impact-on-students-fitness-levels-knowledge-and-in-class-physical-activity
#1
Jeffery Kurt Ward, Peter A Hastie, Danielle D Wadsworth, Shelby Foote, Sheri J Brock, Nikki Hollett
PURPOSE: The purpose of this study was to determine the extent to which a sport education season of fitness could provide students with recommended levels of in-class moderate-to-vigorous physical activity (MVPA) while also increasing students' fitness knowledge and fitness achievement. METHOD: One hundred and sixty-six 5th-grade students (76 boys, 90 girls) participated in a 20-lesson season called "CrossFit Challenge" during a 4-week period. The Progressive Aerobic Cardiovascular Endurance Run, push-ups, and curl-ups tests of the FITNESSGRAM® were used to assess fitness at pretest and posttest, while fitness knowledge was assessed through a validated, grade-appropriate test of health-related fitness knowledge (HRF)...
May 19, 2017: Research Quarterly for Exercise and Sport
https://www.readbyqxmd.com/read/28508559/two-weeks-of-repetitive-gut-challenge-reduces-exercise-associated-gastrointestinal-symptoms-and-malabsorption
#2
Atlanta Miall, Anthony Khoo, Christopher Rauch, Rhiannon Snipe, Vera Camões-Costa, Peter R Gibson, Ricardo J S Costa
Debilitating gastrointestinal symptoms are a common feature of endurance running, and may be exacerbated by and (or) limit the ability to tolerate carbohydrate intake during exercise. The study aimed to determine whether two weeks of repetitive gut-challenge during running can reduce exercise associated gastrointestinal symptoms and carbohydrate malabsorption. Endurance runners (n= 18) performed an initial gut-challenge trial (GC1) comprising 2 h running exercise at 60% VO2max (steady state) whilst consuming a formulated gel-disc containing 30 g carbohydrates (2:1 glucose-fructose, 10% w/v) every 20 min, followed by a 1 h running effort bout...
May 16, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28486332/short-term-heat-acclimation-and-precooling-independently-and-combined-improve-5-km-running-performance-in-the-heat
#3
C A James, A J Richardson, A G B Willmott, P W Watt, O R Gibson, N S Maxwell
Following heat acclimation (HA), endurance running performance remains impaired in hot vs temperate conditions. Combining HA with precooling demonstrates no additive benefit in intermittent sprint, or continuous cycling exercise protocols, during which heat strain may be less severe compared to endurance running. This study investigated the effect of short-term heat acclimation (STHA) combined with mixed-methods precooling, on endurance running performance and directly compared precooling and HA. Nine amateur trained runners completed 5 km treadmill time trials in the heat (32°C, 60% RH) under four conditions; no intervention (CON), precooling (PC), short-term heat acclimation (5 days - HA) and short-term heat acclimation with precooling (HA+PC)...
May 5, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28486015/muscular-and-cardiorespiratory-fitness-in-homeschool-versus-public-school-children
#4
Laura S Kabiri, Katy Mitchell, Wayne Brewer, Alexis Ortiz
PURPOSE: The growth and unregulated structure of homeschooling creates an unknown population in regard to muscular and cardiorespiratory fitness. The purpose of this research was to compare muscular and cardiorespiratory fitness between elementary school aged homeschool and public school children. METHOD: Homeschool children ages 8-11 years old (n=75) completed the curl-up, 90° push-up, and Progressive Aerobic Capacity Endurance Run (PACER) portions of the FitnessGram® to assess abdominal and upper body strength and endurance as well as cardiorespiratory fitness...
May 9, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28480693/factors-determining-800-m-running-performance-in-young-male-athletes
#5
Ramon Cruz, Romulo C de Moraes Bertuzzi, Danilo L Alves, Rafael Azevedo, Phelipe H Cardoso Castro, Jefferson Verbena Freitas, Adriano E Lima-Silva, Fernando R de Oliveira, Jorge R Perrout Lima
BACKGROUND: The aim of the present study was to identify determinant variables on 800-m running performance in young male athletes derived from field tests and biological maturity. METHODS: A total of 89 athletes, aged between 13 and 15 years old, performed a 800-m running trial and a battery of tests which involved anthropometric measurements, a running anaerobic test (RAST), a flexibility test (sit-and-reach), a counter movement jump test and progressive test for aerobic fitness evaluation...
May 5, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28469757/analysis-of-motor-activities-of-professional-soccer-players-during-the-2014-world-cup-in-brazil
#6
Paweł Chmura, Marcin Andrzejewski, Marek Konefał, Dariusz Mroczek, Andrzej Rokita, Jan Chmura
The aim of the present study was to analyze motor activities of soccer players in seven consecutive rounds of matches of the 2014 World Cup in Brazil and to compare the performance of the world champions, the German national team with other participating teams. The study sample comprised 905 observations of 340 soccer players, who played full-time matches in all seven rounds of the tournament. The study was conducted using data collected from the Castrol Performance Index, a kinematic game analysis system that records movements of players with semi-automatic cameras...
February 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28467934/ppar%C3%AE-promotes-running-endurance-by-preserving-glucose
#7
Weiwei Fan, Wanda Waizenegger, Chun Shi Lin, Vincenzo Sorrentino, Ming-Xiao He, Christopher E Wall, Hao Li, Christopher Liddle, Ruth T Yu, Annette R Atkins, Johan Auwerx, Michael Downes, Ronald M Evans
Management of energy stores is critical during endurance exercise; a shift in substrate utilization from glucose toward fat is a hallmark of trained muscle. Here we show that this key metabolic adaptation is both dependent on muscle PPARδ and stimulated by PPARδ ligand. Furthermore, we find that muscle PPARδ expression positively correlates with endurance performance in BXD mouse reference populations. In addition to stimulating fatty acid metabolism in sedentary mice, PPARδ activation potently suppresses glucose catabolism and does so without affecting either muscle fiber type or mitochondrial content...
May 2, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28465287/prevalence-of-subclinical-coronary-artery-disease-in-masters-endurance-athletes-with-a-low-atherosclerotic-risk-profile
#8
Ahmed Merghani, Viviana Maestrini, Stefania Rosmini, Andrew T Cox, Harshil Dhutia, Rachel Bastiaenen, Sarojini David, Tee Joo Yeo, Rajay Narain, Aneil Malhotra, Michael Papadakis, Mathew G Wilson, Maite Tome, Khaled AlFakih, James C Moon, Sanjay Sharma
Background -Studies in middle aged and older (masters) athletes with atherosclerotic risk factors for coronary artery disease (CAD) report higher coronary artery calcium (CAC) scores compared with sedentary individuals. Few studies have assessed the prevalence of CAD in masters athletes with a low atherosclerotic risk profile. Methods -We assessed 152 masters athletes aged 54.4±8.5 years (70% male) and 92 controls of similar age, sex and low Framingham 10 year CAD risk scores with an echocardiogram, exercise stress test, CT coronary angiogram, and cardiovascular magnetic resonance imaging (CMRI) with late gadolinium enhancement (LGE) and a 24-hour Holter...
May 2, 2017: Circulation
https://www.readbyqxmd.com/read/28462571/effects-of-minimal-dose-of-strength-training-on-running-performance-in-female-recreational-runners
#9
Michal Štohanzl, Jiri Baláš, Nick Draper
BACKGROUND: The purpose of this study was to analyse the extent to which minimal dose strength training would elicit improvements in running performance for female recreational runners. METHODS: Forty-one female recreational runners were randomly assigned to one of three groups (endurance running [E] n=14; combined endurance running and strength training program once [ES30] n=14 and twice a week [ES60] n=13, respectively). During the 10-week training program, the E group completed 3 hours of continuous endurance running per week; ES30 completed 2 ½ hours of continuous endurance running and 1 x 30 min of strength training per week, while ES60 group completed 2 hours of continuous endurance running and 2x30 min of strength training per week...
April 28, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28462401/effects-of-exercise-prior-or-during-pregnancy-in-high-fat-diet-fed-mice-alter-bone-gene-expression-of-female-offspring-an-experimental-study
#10
Abbasali Gaeini, Mohamadreza Baghaban Eslaminejad, Siroos Choobineh, Neda Mousavi, Sadegh Satarifard, Leila Shafieineek
BACKGROUND: Based on different studies it was shown that exercise training is an important factor in preconception and prenatal care. OBJECTIVE: The aim of this study was to determine whether regular preconception exercise training with or without exercise training during pregnancy decreases detrimental effects of maternal high fat diet on female offspring bone health. MATERIALS AND METHODS: Twenty-four C57BL/6 female mice were fed high-fat diet (35%) and were randomly divided into four groups: trained in preconception period and exercised during pregnancy (TE); trained in preconception periods but unexercised during pregnancy (TC); untrained in preconception periods but exercised during pregnancy (CE); untrained and unexercised (CC)...
February 2017: International Journal of Reproductive Biomedicine (Yazd, Iran)
https://www.readbyqxmd.com/read/28459794/effectiveness-of-a-16-week-high-intensity-cardio-resistance-training-hicrt-program-in-adults
#11
Tina A Greenlee, Daniel R Greene, Nathan J Ward, Ginger E Reeser, Courtney M Allen, Nicholas W Baumgartner, Neal J Cohen, Arthur F Kramer, Charles H Hillman, Aron K Barbey
The purpose of this study was to determine the efficacy of a novel, 16-week High-Intensity Cardio-Resistance Training (HICRT) program on measures of aerobic fitness, agility, aerobic power, muscular endurance, lower body explosive power, and self-reported activity level. The intervention group (N=129; 63 f, 24.65±5.55 y) had a baseline VO2max of 39.83±9.13. These individuals participated in 26, 70-minute exercise sessions, and 4 fitness testing sessions. Participants were matched with a non-exercise control group, paired by sex, age, and baseline VO2max...
April 26, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28459289/is-there-an-optimum-speed-for-economical-running
#12
Matthew I Black, Joseph C Handsaker, Sam J Allen, Stephanie E Forrester, Jonathan P Folland
The influence of running speed and sex on running economy is unclear and may have been confounded by measurements of oxygen cost that do not account for known differences in substrate metabolism, across a limited range of speeds, and differences in performance standard. Therefore, this study assessed the energy cost of running over a wide-range of speeds in high-level and recreational runners to investigate the effect of speed (considered in absolute and relative terms) and sex (males vs. females of equivalent performance standard) on running economy...
May 1, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28454790/the-impact-of-hepatitis-b-carrier-on-cardiac-troponin-i-in-100-km-ultramarathon-runners
#13
Li-Hua Li, Chorng-Kuang How, Wei-Fong Kao, Yu-Hui Chiu, Chen Meng, Cheng-Chin Hsu, Yeou-Guang Tsay
BACKGROUND: Prolonged endurance exercise is known to cause elevation of cardiac troponin I (cTnI). Previous studies have reported the correlation of several factors with exercise-induced cTnI release. However, the investigation of the predictors for elevated cTnI and postrace kinetics of cTnI after ultramarathon running is lacking, especially in an Oriental population. METHODS: Twenty-six participants, including eight hepatitis B virus carrier (HBVc) runners, who finished a 100-km ultramarathon in Taiwan were enrolled...
April 25, 2017: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/28445229/a-cross-sectional-and-retrospective-cohort-analysis-of-the-effects-of-age-on-flexibility-strength-endurance-lower-body-power-and-aerobic-fitness-in-law-enforcement-officers
#14
Robert G Lockie, J Jay Dawes, Charles L Kornhauser, Ryan J Holmes
There can be a great age range in cohorts of law enforcement officers. As the tasks required of officers generally do not change with advancing age, it is important to understand how physical performance in tests that assess job-specific characteristics may be altered. Retrospective analysis of performance test data for 383 officers (362 males, 21 females) was conducted. The tests included: sit-and-reach to determine hamstring and lower back flexibility; maximal push-up and sit-up repetitions in 60 s to measure muscle endurance; vertical jump (VJ) to assess lower-body power; and 2...
April 18, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28443654/quantifying-the-self-assembly-behavior-of-anisotropic-nanoparticles-using-liquid-phase-transmission-electron-microscopy
#15
Binbin Luo, John W Smith, Zihao Ou, Qian Chen
For decades, one of the overarching objectives of self-assembly science has been to define the rules necessary to build functional, artificial materials with rich and adaptive phase behavior from the bottom-up. To this end, the computational and experimental efforts of chemists, physicists, materials scientists, and biologists alike have built a body of knowledge that spans both disciplines and length scales. Indeed, today control of self-assembly is extending even to supramolecular and molecular levels, where crystal engineering and design of porous materials are becoming exciting areas of exploration...
April 26, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28439212/effect-of-thyme-extract-supplementation-on-lipid-peroxidation-antioxidant-capacity-pgc-1%C3%AE-content-and-endurance-exercise-performance-in-rats
#16
Mostafa Khani, Pezhman Motamedi, Mohammad Reza Dehkhoda, Saeed Dabagh Nikukheslat, Pouran Karimi
BACKGROUND: Athletes have a large extent of oxidant agent production. In the current study, we aimed to determine the influence of thyme extract on the endurance exercise performance, mitochondrial biogenesis, and antioxidant status in rats. METHODS: Twenty male Wistar rats were randomly divided into two groups receiving either normal drinking water (non-supplemented group, n = 10) or thyme extract, 400 mg/kg, (supplemented group, n = 10). Rats in both groups were subjected to endurance treadmill training (27 m/min, 10% grade, 60 min, and 5 days/week for 8 weeks)...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28438715/impact-of-physical-exercise-on-visceral-adipose-tissue-fatty-acid-profile-and-inflammation-in-response-to-a-high-fat-diet-regimen
#17
Sílvia Rocha-Rodrigues, Amaia Rodríguez, Inês O Gonçalves, Ana Moreira, Elisabete Maciel, Sónia Santos, Maria R Domingues, Gema Frühbeck, António Ascensão, José Magalhães
PURPOSE: Studies associate specific fatty-acids (FA) with the pathophysiology of inflammation. We aimed to analyze the impact of exercise on adipose tissue FA profile in response to a high-fat diet (HFD) and to ascertain whether these exercise-induced changes in specific FA have repercussions on obesity-related inflammation. METHODS: Sprague-Dawley rats were assigned into sedentary, voluntary physical-activity (VPA) and endurance training (ET) groups fed a standard (S, 35kcal% fat) or high-fat (71kcal% fat) diets...
April 22, 2017: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/28434152/compression-garments-and-recovery-from-exercise-a-meta-analysis
#18
REVIEW
Freddy Brown, Conor Gissane, Glyn Howatson, Ken van Someren, Charles Pedlar, Jessica Hill
BACKGROUND: Adequate recovery from exercise is essential to maintain performance throughout training and competition. While compression garments (CG) have been demonstrated to accelerate recovery, the literature is clouded by conflicting results and uncertainty over the optimal conditions of use. OBJECTIVES: A meta-analysis was conducted to assess the effects of CG on the recovery of strength, power and endurance performance following an initial bout of resistance, running, or non-load-bearing endurance (metabolic) exercise...
April 22, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28406104/institutionalized-physical-activity-curriculum-benefits-of-medical-students-in-colombia
#19
Gustavo Tovar, Gabriel López, Milcíades Ibáñez, Ricardo Alvarado, Felipe Lobelo, John Duperly
BACKGROUND: Health authorities internationally have recommended implementing physical activity and exercise for health training programs within the curriculum of medical schools. The purpose of this evaluation was to determine the changes in physical fitness and health (Fitnessgram criteria) of a sports medicine and physical activity course implemented for 3rd year students in a private medical school in Bogotá, Colombia. METHODS: Intervention was targeted to 13 medical student cohorts...
September 2016: Education for Health: Change in Training & Practice
https://www.readbyqxmd.com/read/28405052/estimating-the-enduring-effects-of-fertiliser-subsidies-on-commercial-fertiliser-demand-and-maize-production-panel-data-evidence-from-malawi
#20
Jacob Ricker-Gilbert, T S Jayne
Most studies of input subsidy programmes confine their analyses to measuring programme effects over a one-year period. This article estimates the potential longer-run or enduring effects of fertiliser subsidy programmes on smallholder farm households' demand for commercial fertiliser and maize production over time. We use four waves of panel data on 462 farm households in Malawi for whom fertiliser use can be tracked for eight consecutive seasons between 2003/2004 and 2010/2011. Panel estimation methods are used to control for potential endogeneity of subsidised fertiliser acquisition...
February 2017: J Agric Econ
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