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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
#1
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
#2
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
#3
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
#4
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 21, 2017: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/28434152/compression-garments-and-recovery-from-exercise-a-meta-analysis
#5
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
#6
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
#7
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
https://www.readbyqxmd.com/read/28403029/secular-trends-in-the-physical-fitness-of-united-states-army-recruits-on-entry-to-service-1975-2013
#8
Joseph Knapik, Marilyn Sharp, Ryan A Steelman
A systematic literature search was conducted to identify and analyze articles that reported on physical fitness of new United States (US) Army recruits. The National Library of Medicine's PubMed and the Defense Technical Information Center, were searched using the keywords {military personnel OR trainee OR recruit OR soldier} AND {physical fitness OR strength OR endurance OR flexibility OR balance OR coordination OR muscle contraction OR running OR exercise OR physical conditioning}. Reference lists of obtained articles and contact with authors enhanced the search...
April 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28399624/effect-of-respiratory-muscle-training-on-pulmonary-function-and-aerobic-endurance-in-soccer-players
#9
Tarik Ozmen, Gokce Y Gunes, Ilyas Ucar, Hanife Dogan, Tuba U Gafuroglu
BACKGROUND: Few studies investigated the effects of the respiratory muscle training (RMT) in soccer although exhaustive high intensity exercise is known to lead to muscle fatigue in respiratory muscles. The purpose of this study was to investigate the effect of RMT on pulmonary function and aerobic endurance in soccer players. METHODS: Eighteen male soccer players (mean age 22.2±1.4 years) participated in this study. Participants were assigned randomly to either an RMT or a control (CON) group...
May 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28394719/effects-of-strength-explosive-and-plyometric-training-on-energy-cost-of-running-in-ultra-endurance-athletes
#10
Nicola Giovanelli, Paolo Taboga, Enrico Rejc, Stefano Lazzer
The aim of the present study was to evaluate the effects of a 12-week home-based strength, explosive and plyometric (SEP) training on the cost of running (Cr) in well-trained ultra-marathoners and to assess the main mechanical parameters affecting changes in Cr. Twenty-five male runners (38.2 ± 7.1 years; body mass index: 23.0 ± 1.1 kg·m(-2); V˙O2max: 55.4 ± 4.0 mlO2·kg(-1)·min(-1)) were divided into an exercise (EG = 13) and control group (CG = 12). Before and after a 12-week SEP training, Cr, spring-mass model parameters at four speeds (8, 10, 12, 14 km·h(-1)) were calculated and maximal muscle power (MMP) of the lower limbs was measured...
April 10, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28382580/the-dynamics-of-cardiovascular-biomarkers-in-non-elite-marathon-runners
#11
Emma Roca, Lexa Nescolarde, Josep Lupón, Jaume Barallat, James L Januzzi, Peter Liu, M Cruz Pastor, Antoni Bayes-Genis
The number of recreational/non-elite athletes participating in marathons is increasing, but data regarding impact of endurance exercise on cardiovascular health are conflicting. This study evaluated 79 recreational athletes of the 2016 Barcelona Marathon (72% men; mean age 39 ± 6 years; 71% ≥35 years). Blood samples were collected at baseline (24-48 h before the race), immediately after the race (1-2 h after the race), and 48-h post-race. Amino-terminal pro-B type natriuretic peptide (NT-proBNP, a marker of myocardial strain), ST2 (a marker of extracellular matrix remodeling and fibrosis, inflammation, and myocardial strain), and high-sensitivity troponin T (hs-TnT, a marker of myocyte stress/injury) were assayed...
April 5, 2017: Journal of Cardiovascular Translational Research
https://www.readbyqxmd.com/read/28377791/effect-of-a-12-week-summer-break-on-school-day-physical-activity-and-health-related-fitness-in-low-income-children-from-cspap-schools
#12
You Fu, Timothy A Brusseau, James C Hannon, Ryan D Burns
Background. The purpose of this study was to examine the effect of a 12-week summer break on school day physical activity and health-related fitness (HRF) in children from schools receiving a Comprehensive School Physical Activity Program (CSPAP). Methods. Participants were school-aged children (N = 1,232; 624 girls and 608 boys; mean age = 9.5 ± 1.8 years) recruited from three low-income schools receiving a CSPAP. Physical activity and HRF levels were collected during the end of spring semester 2015 and again during the beginning of fall semester 2015...
2017: Journal of Environmental and Public Health
https://www.readbyqxmd.com/read/28376240/the-development-of-the-physical-fitness-construct-across-childhood
#13
Till Utesch, Dennis Dreiskämper, Bernd Strauss, Roland Naul
The measurement of physical fitness (PF) is an important factor from many different perspectives. PF is a determinant of healthy child development as it is related to several health outcomes. However, existing taxonomies of the construct and frequently used fitness assessments vary concerning their theoretical assumptions and practical implications. From a theoretical perspective, the construct of physical fitness covers a variety of motor domains, such as cardiovascular endurance, strength, coordination, or flexibility (e...
April 4, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28368957/impact-of-endurance-exercise-in-hypoxia-on-muscle-damage-inflammatory-and-performance-responses
#14
Daichi Sumi, Chihiro Kojima, Kazushige Goto
This study evaluated muscle damage and inflammatory and performance responses following high-intensity endurance exercise in moderate hypoxia among endurance athletes. Nine trained endurance athletes completed two different trials on different days: exercise under moderate hypoxia (H trial, FiO2 = 14.5%) and normoxia (N trial, FiO2 = 20.9%). They performed interval exercises (10 × 3-min running at 95% of VO2max with 60-s of active rest at 60% of VO2max) followed by 30-min of continuous running at 85% of VO2max under either hypoxic or normoxic conditions...
March 25, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28362866/thoraco-abdominal-coordination-and-performance-during-uphill-running-at-altitude
#15
Eva Bernardi, Lorenza Pratali, Gaia Mandolesi, Maria Spiridonova, Giulio Sergio Roi, Annalisa Cogo
INTRODUCTION: Running races on mountain trails at moderate-high altitude with large elevation changes throughout has become increasingly popular. During exercise at altitude, ventilatory demands increase due to the combined effects of exercise and hypoxia. AIM: To investigate the relationships between thoraco-abdominal coordination, ventilatory pattern, oxygen saturation (SpO2), and endurance performance in runners during high-intensity uphill exercise. METHODS: Fifteen participants (13 males, mean age 42±9 yrs) ran a "Vertical Kilometer," i...
2017: PloS One
https://www.readbyqxmd.com/read/28350714/multiple-transportable-carbohydrate-impact-on-long-distance-triathlon-performance
#16
David S Rowlands, Stuart D Houltham
The ingestion of multiple (2:1 glucose:fructose) transportable carbohydrate in beverages at high rates (>78 g·h) during endurance exercise enhances exogenous carbohydrate oxidation, fluid absorption, gut comfort, and performance, relative to glucose alone. But during long-distance endurance competition, athletes prefer a solid-gel-drink format, and the effect size of multiple-transportable carbohydrate is unknown. PURPOSE: To determine the effect of multiple-transportable carbohydrate on triathlon competition performance when ingested within bars, gels, and drinks...
March 27, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28349501/a-placebo-controlled-trial-of-riboflavin-for-enhancement-of-ultramarathon-recovery
#17
Martin D Hoffman, Taylor R Valentino, Kristin J Stuempfle, Brandon V Hassid
BACKGROUND: Riboflavin is known to protect tissue from oxidative damage but, to our knowledge, has not been explored as a means to control exercise-related muscle soreness. This study investigated whether acute ingestion of riboflavin reduces muscle pain and soreness during and after completion of a 161-km ultramarathon and improves functional recovery after the event. METHODS: In this double-blind, placebo-controlled trial, participants of the 2016 161-km Western States Endurance Run were assigned to receive a riboflavin or placebo capsule shortly before the race start and when reaching 90 km...
December 2017: Sports Medicine—Open
https://www.readbyqxmd.com/read/28349038/the-effect-of-treadmill-based-and-track-based-walking-training-on-physical-fitness-in-ankle-sprain-experienced-young-people
#18
Eunsook Sung
The purpose of this study was to evaluate the effects of 12-week treadmill-based (MT) and track-based (TT) walking program on maximal oxygen consumption (VO2max), muscular endurance, muscle strength, and ankle range of motion (ROM) in ankle sprain experienced young people. Twenty subjects (12 males, 8 females) volunteered to participate in this study and divided into two groups (MT and TT). All subjects completed MT and TT 4 times per week with each session of 60 min with 65% from maximum heart rate. Incremental test on treadmill and 20-m shuttle run test for endurance capacity (VO2max), 2-km walking test for muscular endurance, vertical jump for strength, and ankle ROM for flexibility were analyzed before and after the training intervention...
February 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/28348942/biochemistry-in-endeavor-adventure-racers-study-bears
#19
Matthew Wetschler, David Radler, Mark Christensen, Grant Lipman
BACKGROUND:  Adventure sports events consist of a combination of two or more endurance disciplines, such as orienteering, running, and rock climbing, that range from a day's to a week's duration. No studies have examined acute kidney injury (AKI) in adventure sports athletes. OBJECTIVES: To describe the prevalence of AKI in participants in the Endeavor Team Challenge, a 30-hour, 40-mile adventure race. METHODS: In this prospective observational study, body weights were recorded at race registration...
February 11, 2017: Curēus
https://www.readbyqxmd.com/read/28344839/associations-between-body-fat-percentage-and-fitness-among-police-officers-a-statewide-study
#20
John M Violanti, Claudia C Ma, Desta Fekedulegn, Michael E Andrew, Ja K Gu, Tara A Hartley, Luenda E Charles, Cecil M Burchfiel
BACKGROUND: Police work is generally sedentary although there may be situations that require physical endurance and strength, such as foot chases and arresting suspects. Factors such as excessive body fat can impede an officer's physical ability to deal with such occurrences. Our objective was to examine associations between officers' body fat percentage (BF%) and performance on a standardized fitness protocol. METHODS: Data were obtained from fitness screening among 1,826 male and 115 female officers in a large US police agency...
March 2017: Safety and Health At Work
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