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https://www.readbyqxmd.com/read/28430546/overall-preference-of-running-shoes-can-be-predicted-by-suitable-perception-factors-using-a-multiple-regression-model
#1
Cheryl Sihui Tay, Thorsten Sterzing, Chen Yen Lim, Rui Ding, Pui Wah Kong
OBJECTIVE: This study examined (a) the strength of four individual footwear perception factors to influence the overall preference of running shoes and (b) whether these perception factors satisfied the nonmulticollinear assumption in a regression model. BACKGROUND: Running footwear must fulfill multiple functional criteria to satisfy its potential users. Footwear perception factors, such as fit and cushioning, are commonly used to guide shoe design and development, but it is unclear whether running-footwear users are able to differentiate one factor from another...
May 2017: Human Factors
https://www.readbyqxmd.com/read/28426511/an-evaluation-of-time-trial-based-predictions-of-v-combining-dot-above-o2max-and-recommended-training-paces-for-collegiate-and-recreational-runners
#2
E M Scudamore, V W Barry, J M Coons
The purpose of the current study was to determine the accuracy of Jack Daniels' VDOT Running Calculator for the prediction of V[Combining Dot Above]O2max, and recommendations of interval and training paces (pIN & pTH) in samples of NCAA Division 1 track athletes (ATH, n = 11) and recreational runners (REC; n = 9). Predicted variable data were obtained using results from indoor 5km time-trials. Data from the VDOT calculator was compared to laboratory tested V[Combining Dot Above]O2max, pace at V[Combining Dot Above]O2max (V[Combining Dot Above]O2maxpace), and lactate threshold pace (LTpace)...
April 15, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28426196/chiral-inorganic-nanostructures
#3
Wei Ma, Liguang Xu, André F de Moura, Xiaoling Wu, Hua Kuang, Chuanlai Xu, Nicholas A Kotov
The field of chiral inorganic nanostructures is rapidly expanding. It started from the observation of strong circular dichroism during the synthesis of simple nanoparticles (NPs) and their assemblies mediated by biomolecules and expanded to sophisticated synthetic protocols involving nanostructures from metals, semiconductors, ceramics, and nanocarbons. Besides the well-established chirality transfer from bioorganic molecules, other methods to impart handedness to nanoscale matter specific to inorganic materials were discovered, including three-dimentional lithography, multiphoton chirality transfer, polarization effects in nanoscale assemblies, and others...
April 20, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/28426020/social-networks-push-runners-to-run-further-and-faster-than-their-friends
#4
EDITORIAL
(no author information available yet)
No abstract text is available yet for this article.
April 18, 2017: Nature
https://www.readbyqxmd.com/read/28424267/using-a-novel-data-resource-to-explore-heart-rate-during-mountain-and-road-running
#5
Andrew Best, Barry Braun
Online, accessible performance and heart rate data from running competitions are posted publicly or semi-publicly to social media. We tested the efficacy of one such data resource- Strava- as a tool in exercise physiology investigations by exploring heart rate differences in mountain racing and road racing running events. Heart rate and GPS pace data were gathered from Strava activities posted by 111 males aged 21-49, from two mountain races (Mt. Washington Road Race and Pike's Peak Ascent) and two road race distances (half marathon and marathon)...
April 2017: Physiological Reports
https://www.readbyqxmd.com/read/28423015/correction-16-weeks-of-progressive-barefoot-running-training-changes-impact-force-and-muscle-activation-in-habitual-shod-runners
#6
Ana Paula da Silva Azevedo, Bruno Mezêncio, Alberto Carlos Amadio, Julio Cerca Serrão
[This corrects the article DOI: 10.1371/journal.pone.0167234.].
2017: PloS One
https://www.readbyqxmd.com/read/28418379/exercise-contagion-in-a-global-social-network
#7
Sinan Aral, Christos Nicolaides
We leveraged exogenous variation in weather patterns across geographies to identify social contagion in exercise behaviours across a global social network. We estimated these contagion effects by combining daily global weather data, which creates exogenous variation in running among friends, with data on the network ties and daily exercise patterns of ∼1.1M individuals who ran over 350M km in a global social network over 5 years. Here we show that exercise is socially contagious and that its contagiousness varies with the relative activity of and gender relationships between friends...
April 18, 2017: Nature Communications
https://www.readbyqxmd.com/read/28417667/immediate-and-short-term-biomechanical-adaptation-of-habitual-barefoot-runners-who-start-shod-running
#8
Ivan P H Au, Fannie O Y Lau, Winko W An, Janet H Zhang, Tony L Chen, Roy T H Cheung
This study investigated the immediate and short-term effects of minimalist shoes (MS) and traditional running shoes (TRS) on vertical loading rates, foot strike pattern and lower limb kinematics in a group of habitual barefoot runners. Twelve habitual barefoot runners were randomly given a pair of MS or TRS and were asked to run with the prescribed shoes for 1 month. Outcome variables were obtained before, immediate after and 1 month after shoe prescription. Average and instantaneous vertical loading rates at the 1-month follow-up were significantly higher than that at the pre-shod session (P < 0...
April 18, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28415084/p260right-cardiac-chambers-remodeling-in-marathon-and-ultra-trail-athletes-detected-by-speckle-tracking-echocardiography
#9
K Ujka, R M Bruno, B Catuzzo, L Bastiani, A Tonacci, G D'angelo, S Mrakic-Sposta, A Vezzoli, G Giardini, L Pratali
Background: Strenuous and chronic exercise training can have detrimental effects on cardiac morphology and function. Our aim was to evaluate the cardiac adaptation between 2 different specialties' endurance athletes: marathon runners (M) and ultra-trailers (UT). Methods: 47 M (age 45±7, men 32; training: 18 (9-53) years*days/week), 41 UT (age 42±9, men 38, training: 30 (15-66) years*days/week) were submitted in rest condition to conventional 2D echocardiography and Speckle-Tracking echo (STE) (Beyond Diogenes 2...
December 1, 2016: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28413452/ankle-and-toe-muscle-strength-characteristics-in-runners-with-a-history-of-medial-tibial-stress-syndrome
#10
Junya Saeki, Masatoshi Nakamura, Sayaka Nakao, Kosuke Fujita, Ko Yanase, Katsuyuki Morishita, Noriaki Ichihashi
BACKGROUND: A high proportion of flexor digitorum longus attachment is found at the posteromedial border of the tibia, which is the most common location of medial tibial stress syndrome (MTSS). Therefore, plantar flexion strength of the lesser toes could be related to MTSS; however, the relationship between MTSS and muscle strength of the hallux and lesser toes is not yet evaluated due to the lack of quantitative methods. This study investigated the muscle strength characteristics in runners with a history of MTSS by using a newly developed device to measure the muscle strength of the hallux, lesser toes, and ankle...
2017: Journal of Foot and Ankle Research
https://www.readbyqxmd.com/read/28411009/skeletal-muscle-morphology-and-regulatory-signalling-in-endurance-trained-and-sedentary-individuals-the-influence-of-ageing
#11
U R Mikkelsen, J Agergaard, C Couppé, J F Grosset, A Karlsen, S P Magnusson, P Schjerling, M Kjaer, A L Mackey
Muscle mass in humans is inversely associated with circulating levels of inflammatory cytokines, but the interaction between ageing and training on muscle composition and the intra-muscular signalling behind inflammation and contractile protein synthesis and degradation is unknown. We studied 15 healthy life-long endurance runners, 12 age-matched untrained controls, 10 young trained and 12 young untrained individuals. Thigh muscle composition was investigated by magnetic resonance imaging (MRI), where non-contractile intramuscular tissue (NCIT) area (fat and connective tissue) was found to be greater in older but lower in trained individuals...
April 11, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28409513/effects-of-arm-insulation-on-physiological-responses-during-running-in-the-cold
#12
Ryo Ito, Naoyuki Yamashita, Takaaki Matsumoto
BACKGROUND: Individuals who exercise outdoors in winter expose themselves to cold conditions, which have detrimental effects on physiological responses and exercise performance. Many runners wear arm warmers to protect against cold. However, the effects of these warmers remain unclear. This study aimed to determine the effect of arm insulation on physiological responses during running in a cold environment. METHODS: Twelve healthy men (mean ± SD age, 22.4 ± 3...
April 13, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28406358/bone-health-in-elite-kenyan-runners
#13
Nicholas Tam, Jordan Santos-Concejero, Ross Tucker, Robert P Lamberts, Lisa K Micklesfield
Impact loading in athletes participating in various sports has been positively associated with increased bone mineral density (BMD), but this has not been investigated in elite Kenyan runners. Body composition and site-specific BMD measures quantified with dual x-ray absorptiometry were measured in 15 elite male Kenyan runners and 23 apparently healthy South African males of different ethnicities. Training load and biomechanical variables associated with impact loading, such as joint stiffness, were determined in the elite Kenyan runners...
April 13, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28405198/mapping-water-stress-incidence-and-intensity-optimal-plant-populations-and-cultivar-duration-for-african-groundnut-productivity-enhancement
#14
Vincent Vadez, Oumarou Halilou, Halime M Hissene, Pierre Sibiry-Traore, Thomas R Sinclair, Afshin Soltani
Groundnut production is limited in Sub-Saharan Africa and water deficit or "drought," is often considered as the main yield-limiting factor. However, no comprehensive study has assessed the extent and intensity of "drought"-related yield decreases, nor has it explored avenues to enhance productivity. Hence, crop simulation modeling with SSM (Simple Simulation Modeling) was used to address these issues. To palliate the lack of reliable weather data as input to the model, the validity of weather data generated by Marksim, a weather generator, was tested...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28404556/recent-acute-prerace-systemic-illness-in-runners-increases-the-risk-of-not-finishing-the-race-safer-study-v
#15
Leigh Gordon, Martin Schwellnus, Sonja Swanevelder, Esme Jordaan, Wayne Derman
AIM: There are limited data on the negative effects of exercise in athletes with acute infective illness. The aim of this study was to determine whether a recently diagnosed prerace acute illness in runners affects the ability to finish a race. METHODS: Runners were prospectively evaluated in the 3 days before the race for acute infective illness and then received participation advice using clinical criteria based on systemic or localised symptoms/signs. We compared the did-not-start and the did-not-finish frequencies of ill runners (Ill=172: localised=58...
April 12, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28394719/effects-of-strength-explosive-and-plyometric-training-on-energy-cost-of-running-in-ultra-endurance-athletes
#16
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/28394683/relation-between-nail-consistency-and-incidence-of-ingrown-toenails-in-young-male-runners
#17
Ana María Pérez Pico, Elisabeth Verjano, Raquel Mayordomo
BACKGROUND: This study examines the possible influence of factors such as nail shape and consistency, sex, and sports activity on the development of the most common nail disorders in a population of young people. METHODS: The nail plates of 140 young people (66 females and 74 males) were studied. Of these 140 participants, 72 were runners who trained more than 10 hours a week and competed regularly, and 68 did not habitually do any sports activity. Nail shape, consistency, and disorders were examined, taking into account the sex of the participants and their sports activity...
March 2017: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/28390293/comparison-of-foot-muscle-morphology-and-foot-kinematics-between-recreational-runners-with-normal-feet-and-with-asymptomatic-over-pronated-feet
#18
Xianyi Zhang, Jeroen Aeles, Benedicte Vanwanseele
Over-pronated feet are common in adults and are associated with lower limb injuries. Studying the foot muscle morphology and foot kinematic patterns is important for understanding the mechanism of over-pronation related injuries. The aim of this study is to compare the foot muscle morphology and foot inter-segmental kinematics between recreational runners with normal feet and those with asymptomatic over-pronated feet. A total of 26 recreational runners (17 had normal feet and 9 had over-pronated feet) participated in this study and their foot type was assessed using the 6-item Foot Posture Index...
March 31, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28389512/theoretical-and-biological-evaluation-of-the-link-between-low-exercise-capacity-and-disease-risk
#19
Lauren Gerard Koch, Steven L Britton
Large-scale epidemiological studies show that low exercise capacity is the highest risk factor for all-cause morbidity and mortality relative to other conditions including diabetes, hypertension, and obesity. This led us to formulate the energy transfer hypothesis (ETH): Variation in capacity for energy transfer is the central mechanistic determinant of the divide between disease and health. As a test of this hypothesis, we predicted that two-way selective breeding of genetically heterogeneous rats for low and high intrinsic treadmill running capacity (a surrogate for energy transfer) would also produce rats that differ for disease risks...
April 7, 2017: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/28388780/effect-of-footwear-on-dynamic-stability-during-single-leg-jump-landings
#20
Bradley J Bowser, William C Rose, Robert McGrath, Jilian Salerno, Joshua Wallace, Irene S Davis
Barefoot and minimal footwear running has led to greater interest in the biomechanical effects of different types of footwear. The effect of running footwear on dynamic stability is not well understood. The purpose of this study was to compare dynamic stability and impact loading across 3 footwear conditions; barefoot, minimal footwear and standard running shoes. 25 injury free runners (21 male, 4 female) completed 5 single-leg jump landings in each footwear condition. Dynamic stability was assessed using the dynamic postural stability index and its directional components (mediolateral, anteroposterior, vertical)...
April 7, 2017: International Journal of Sports Medicine
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