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https://www.readbyqxmd.com/read/29792293/recruitment-and-participation-of-recreational-runners-in-a-large-epidemiological-and-genetic-research-study-retrospective-data-analysis
#1
Silvia Manzanero, Maria Kozlovskaia, Nicole Vlahovich, David C Hughes
BACKGROUND: With the increasing capacity for remote collection of both data and samples for medical research, a thorough assessment is needed to determine the association of population characteristics and recruitment methodologies with response rates. OBJECTIVE: The aim of this research was to assess population representativeness in a two-stage study of health and injury in recreational runners, which consisted of an epidemiological arm and genetic analysis. METHODS: The cost and success of various classical and internet-based methods were analyzed, and demographic representativeness was assessed for recruitment to the epidemiological survey, reported willingness to participate in the genetic arm of the study, actual participation, sample return, and approval for biobank storage...
May 23, 2018: JMIR Research Protocols
https://www.readbyqxmd.com/read/29792108/does-maximalist-footwear-lower-impact-loading-during-level-ground-and-downhill-running
#2
Zoe Y S Chan, Ivan P H Au, Fannie O Y Lau, Eric C K Ching, Janet H Zhang, Roy T H Cheung
A new model of running shoes which features an extreme cushioning and an oversized midsole, known as the maximalist (MAX) was launched. This design claims to provide excellent shock absorption, particularly during downhill running. This study sought to assess the effects of MAX on the external impact loading, footstrike pattern, and stride length during level ground and downhill running on an instrumented treadmill. Twenty-seven distance runners completed four 5-minute running trials in the two footwear conditions (MAX and traditional running shoes (TRS)) on a level surface (0%) and downhill (10%-declination)...
May 24, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29791649/bouts-of-exercise-elicit-discordant-testosterone-cortisol-ratios-in-runners-and-non-runners
#3
Thiago Paes de Barros De Luccia, José Eduardo Soubhia Natali, Alexandre Moreira, José Guilherme Chaui-Berlinck, José Eduardo Pereira Wilken Bicudo
OBJECTIVE: The testosterone:cortisol ratio (T:C) is suggested to be used in order to examine whether physical exercise generates either a "catabolic environment" or an "anabolic environment". The present study aims to evaluate the acute time-course profile of cortisol and testosterone due to an episode of physical exercise. A biphasic profile in the T:C ratio response was hypothesized. MATERIALS AND METHODS: Morning sessions of treadmill running at two different intensities (Heart Rate at 65% and 80% of the maximum cardiac reserve) were performed by 6 male non-runners (NR) and 12 trained male runners (subdivided into trained runners T1 and T2)...
May 17, 2018: Archives of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29791183/a-2-year-prospective-cohort-study-of-overuse-running-injuries-the-runners-and-injury-longitudinal-study-trails
#4
Stephen P Messier, David F Martin, Shannon L Mihalko, Edward Ip, Paul DeVita, D Wayne Cannon, Monica Love, Danielle Beringer, Santiago Saldana, Rebecca E Fellin, Joseph F Seay
BACKGROUND: The National Center for Injury Prevention and Control, noting flaws in previous running injury research, called for more rigorous prospective designs and comprehensive analyses to define the origin of running injuries. PURPOSE: To determine the risk factors that differentiate recreational runners who remain uninjured from those diagnosed with an overuse running injury during a 2-year observational period. STUDY DESIGN: Cohort study; Level of evidence, 2...
May 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29790452/does-biological-sex-impact-intestinal-epithelial-injury-small-intestine-permeability-gastrointestinal-symptoms-and-systemic-cytokine-profile-in-response-to-exertional-heat-stress
#5
Rhiannon M J Snipe, Ricardo J S Costa
This study aimed to determine the influence of biological sex on intestinal injury, permeability, gastrointestinal symptoms, and systemic cytokine profile in response to exertional-heat stress. Male (n= 13) and eumenorrheic female (n= 11) endurance runners completed 2 h running at 60% V̇O2max in 35°C. Blood samples were collected pre- and post-exercise and during recovery to determine plasma intestinal fatty-acid binding protein (I-FABP) and systemic cytokine profile. Urinary lactulose:L-rhamnose ratio was used to determine small intestine permeability...
May 23, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29789507/acute-caffeinated-coffee-consumption-does-not-improve-time-trial-performance-in-an-800-m-run-a-randomized-double-blind-crossover-placebo-controlled-study
#6
Alexandre C Marques, Alison A Jesus, Bruna M Giglio, Ana C Marini, Patrícia C B Lobo, João F Mota, Gustavo D Pimentel
INTRODUCTION: Studies evaluating caffeinated coffee (CAF) can reveal ergogenic effects; however, studies on the effects of caffeinated coffee on running are scarce and controversial. AIM: To investigate the effects of CAF consumption compared to decaffeinated coffee (DEC) consumption on time trial performances in an 800-m run in overnight-fasting runners. METHODS: A randomly counterbalanced, double-blind, crossover, placebo-controlled study was conducted with 12 healthy adult males with experience in amateur endurance running...
May 23, 2018: Nutrients
https://www.readbyqxmd.com/read/29789265/the-physiological-and-perceptual-demands-of-running-on-a-curved-non-motorised-treadmill-implications-for-self-paced-training
#7
Patrick P J M Schoenmakers, Kate E Reed
OBJECTIVES: To compare physiological and perceptual response of running on a curved non-motorized treadmill (cNMT) with running on a motorized treadmill (MT), and to determine the running velocity at which a physiological response≥90% V˙O2 max was elicited. DESIGN & METHODS: 13 trained male runners (mean±SD; 36±11years, 1.80±0.06m, 70±4kg, V˙O2 max: 57.3±3.5 mLkg-1 min-1 ) performed an incremental running test on a MT to determine V˙O2 max and the accompanying maximum velocity (Vmax)...
May 19, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29787934/how-not-to-interpret-a-non-causal-association-in-sports-injury-science
#8
Mette Hjerrild, Solvej Videbaek, Daniel Theisen, Laurent Malisoux, Rasmus Oestergaard Nielsen
OBJECTIVE: To discuss the interpretability of non-causal associations to sports injury development exemplified via the relationship between navicular drop (ND) and running-related injury (RRI) in novice runners using neutral shoes. DESIGN: 1-year prospective cohort study. SETTING: Denmark. PARTICIPANTS: 926 novice runners, representing 1852 feet, were included. MAIN OUTCOME MEASURE: The outcome was "a musculoskeletal complaint of the lower extremity or back caused by running, which restricted the amount of running for at least a week"...
May 16, 2018: Physical Therapy in Sport
https://www.readbyqxmd.com/read/29787473/factors-contributing-to-medial-tibial-stress-syndrome-in-runners-a-prospective-study
#9
James Becker, Mimi Nakajima, Will F W Wu
PURPOSE: Medial tibial stress syndrome (MTSS) is one of the most common overuse injuries sustained by runners. Despite the prevalence of this injury, risk factors for developing MTSS remain unclear. The purpose of this study was to prospectively evaluate differences in passive range of motion, muscle strength, plantar pressure distributions, and running kinematics between runners who developed MTSS and those who did not. METHODS: 24 NCAA Division 1 cross country runners participated in this study...
May 22, 2018: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29781934/absolute-reliability-and-concurrent-validity-of-the-stryd-system-for-the-assessment-of-running-stride-kinematics-at-different-velocities
#10
Felipe García-Pinillos, Luis E Roche-Seruendo, Noel Marcén-Cinca, Luis A Marco-Contreras, Pedro A Latorre-Román
García-Pinillos, F, Roche-Seruendo, LE, Marcen-Cinca, N, Marco-Contreras, LA, and Latorre-Román, PA. Absolute reliability and concurrent validity of the Stryd system for the assessment of running stride kinematics at different velocities. J Strength Cond Res XX(X): 000-000, 2018-This study aimed to determine the absolute reliability and to evaluate the concurrent validity of the Stryd system for measuring spatiotemporal variables during running at different velocities (8-20 km·h) by comparing data with another widely used device (the OptoGait system)...
May 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29780837/foot-kinematics-differ-between-runners-with-and-without-a-history-of-navicular-stress-fractures
#11
James Becker, Stanley James, Louis Osternig, Li-Shan Chou
Background: A navicular stress fracture (NSF) is a common and high-risk injury in distance runners. It is not clear whether there are differences in foot structure and function between runners who have and those who have not sustained an NSF. Purpose/Hypothesis: This study compared foot structure, range of motion, and biomechanics between runners with a history of unilateral NSFs and runners who had never sustained this injury. The hypothesis was that runners with a history of NSFs will have less dorsiflexion and subtalar range of motion in a clinical examination and greater rearfoot eversion and higher eversion velocity while running than either the noninvolved feet or healthy controls...
April 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29780808/real-time-observations-of-food-and-fluid-timing-during-a-120-km-ultramarathon
#12
Floris C Wardenaar, Daan Hoogervorst, Joline J Versteegen, Nancy van der Burg, Karin J Lambrechtse, Coen C W G Bongers
The aim of the present case study was to use real-time observations to investigate ultramarathon runners' timing of food and fluid intake per 15 km and per hour, and total bodyweight loss due to dehydration. The study included 5 male ultramarathon runners observed during a 120 km race. The research team members followed on a bicycle and continuously observed their dietary intake using action cameras. Hourly carbohydrate intake ranged between 22.1 and 62.6 g/h, and fluid intake varied between 260 and 603 mL/h...
2018: Frontiers in Nutrition
https://www.readbyqxmd.com/read/29774866/femoral-neck-stress-fracture-in-a-young-female-recruit-case-report
#13
Hélder Fonte, Ricardo Rodrigues-Pinto
INTRODUCTION: Femoral neck stress fractures are uncommon and depending on their location, can be at high risk for non-union and significant morbidity.  Their prevalence is higher among runners and military recruits, and women seem to be at higher risk. METHODS: A 27-year-old female, who was enrolled in military recruit, reported left side groin pain after a strenuous running exercise. Due to persistent pain an X-Ray was ordered, which revealed no signs of acute lesions...
2018: SICOT-J
https://www.readbyqxmd.com/read/29774775/inactive-runners-or-sedentary-active-individuals
#14
David Thivel, Martine Duclos
No abstract text is available yet for this article.
May 18, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29771609/achilles-tendon-structure-differs-between-competitive-distance-runners-and-non-runners-despite-no-clinical-signs-or-symptoms-of-mid-substance-tendinopathy
#15
Todd J Hullfish, Kenton L Hagan, Ellen Casey, Josh R Baxter
Achilles tendinopathy affects many running athletes and often leads to chronic pain and functional deficits. While changes in tendon structure have been linked with tendinopathy, the effects of distance running on tendon structure is not well understood. Therefore, the purpose of this study was to characterize structural differences in the Achilles tendons in healthy young adults and competitive distance runners using quantitative ultrasound analyses. We hypothesized that competitive distance runners with no clinical signs or symptoms of tendinopathy would have quantitative signs of tendon damage, characterized by decreased collagen alignment and echogenicity, in addition to previous reports of thicker tendons...
May 17, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29770274/do-running-speed-and-shoe-cushioning-influence-impact-loading-and-tibial-shock-in-basketball-players
#16
Wing-Kai Lam, Jacobus Liebenberg, Jeonghyun Woo, Sang-Kyoon Park, Suk-Hoon Yoon, Roy Tsz-Hei Cheung, Jiseon Ryu
Background: Tibial stress fracture (TSF) is a common injury in basketball players. This condition has been associated with high tibial shock and impact loading, which can be affected by running speed, footwear condition, and footstrike pattern. However, these relationships were established in runners but not in basketball players, with very little research done on impact loading and speed. Hence, this study compared tibial shock, impact loading, and foot strike pattern in basketball players running at different speeds with different shoe cushioning properties/performances...
2018: PeerJ
https://www.readbyqxmd.com/read/29766694/analysis-of-the-choice-of-food-products-and-the-energy-value-of-diets-of-female-middle-and-long-distance-runners-depending-on-the-self-assessment-of-their-nutritional-habits
#17
Dominika Głąbska, Marta Jusińska
Background: Properly balanced diet is especially important in the case of young athletes, as it influences not only their physical development, but also influences results obtained during trainings and competitions. Objective: The aim of the study was to assess the choice of food products and the energy value of diets of female middleand long-distance runners, depending on the self-assessment of their nutritional habits. Material and methods: The study was conducted in the group of 40 female middle- and long-distance runners, aged 15-25, who declared average diet (n=15, 37...
2018: Roczniki Państwowego Zakładu Higieny
https://www.readbyqxmd.com/read/29761269/effects-of-running-a-marathon-on-irisin-concentration-in-men-aged-over-50
#18
Paweł Jóźków, Dawid Koźlenia, Katarzyna Zawadzka, Marek Konefał, Paweł Chmura, Katarzyna Młynarska, Michał Kosowski, Marek Mędraś, Jan Chmura, Piotr Ponikowski, Jacek Daroszewski
Our aim was to verify whether running a marathon is associated with changes in irisin concentration in healthy, endurance-trained men. In an observational study, we assessed baseline biochemical and fitness parameters of 28 middle-aged runners (mean ± SD age, BMI, VO2max : 58 ± 8 years; 24.5 ± 3 kg/m2 ; 51.1 ± 1.7 ml/kg/min). We evaluated irisin before, immediately after, and 7 days after the marathon. Irisin concentration decreased from a baseline value of 639 ± 427 to 461 ± 255 ng/ml immediately after the marathon (p < 0...
May 14, 2018: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/29757055/urine-specific-gravity-as-a-practical-marker-for-identifying-sub-optimal-fluid-intake-of-runners-12-h-post-exercise
#19
Eric Kyle O'Neal, Samantha Louise Johnson, Brett Alan Davis, Veronika Pribyslavska, Mary Caitlin Stevenson-Wilcoxson
The legitimacy of urine specific gravity (USG) as a standalone measure to detect hydration status has recently been challenged. As an alternative to hydration status, the purpose of this study was to determine the diagnostic capability of using the traditional USG marker of >1.020 to detect insufficient recovery fluid consumption with consideration for moderate versus high sweat losses (2.00-2.99 or > 3% body mass respectively). Adequate recovery fluid intake (ARFI) was operationally defined as ≥100% beverage fluid intake plus food water from 1 or 2 meals and a snack...
May 14, 2018: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29757053/applying-a-low-fodmap-dietary-intervention-to-a-female-ultra-endurance-runner-with-irritable-bowel-syndrome-during-a-multi-stage-ultra-marathon
#20
Stephanie K Gaskell, Ricardo J S Costa
Malabsorption of Fermentable Oligo- Di- and Mono-saccharides and Polyols (FODMAPs) in response to prolonged exercise may increase incidence of upper- and lower-gastrointestinal symptoms (GIS), which are known to impair exercise performance. The case-study aimed to explore the impact of a low-FODMAP diet on exercise-associated GIS in a female ultra-endurance runner diagnosed with irritable bowel syndrome (IBS), competing in a six-day 186.7 km mountainous multi-stage ultra-marathon (MSUM). IBS symptom severity score at diagnosis was 410 and following a low-FODMAP diet (3...
May 14, 2018: International Journal of Sport Nutrition and Exercise Metabolism
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