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Recreational runners

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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
#1
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/29747079/mechanical-effects-of-medial-and-lateral-wedged-orthoses-during-running
#2
Jonathan Sinclair
OBJECTIVE: The aim of the current investigation was to examine the effects of orthoses with 5° medial and lateral wedges on knee joint kinetics during the stance phase of running. DESIGN: Repeated measures. SETTING: Laboratory. PARTICIPANTS: Twelve recreational runners. OUTCOME MEASUREMENTS: Twelve male participants ran over a force platform at 4.0 m/s in three different conditions (medial orthotic, lateral orthotic and no-orthotic)...
May 3, 2018: Physical Therapy in Sport
https://www.readbyqxmd.com/read/29743826/effect-of-bilberry-juice-on-indices-of-muscle-damage-and-inflammation-in-runners-completing-a-half-marathon-a-randomised-placebo-controlled-trial
#3
Anthony Lynn, Samantha Garner, Nichola Nelson, Trevor N Simper, Anna C Hall, Mayur K Ranchordas
Background: Emerging evidence indicates that fruits rich in polyphenols may attenuate exercise-induced muscle damage and associated markers of inflammation and soreness. This study was conducted to determine whether bilberry juice (BJ), which is particularly rich in polyphenols, reduces markers of muscle damage in runners completing a half marathon. Methods: A total of 21 recreationally trained runners (age 30.9 ± 10.4 y; mass 71.6 ± 11.0 kg; M = 16; F = 5) were recruited to a single blind, randomised, placebo-controlled, parallel study...
2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29729546/risk-models-for-lower-extremity-injuries-among-short-and-long-distance-runners-a-prospective-cohort-study
#4
Dennis van Poppel, Gwendolijne G M Scholten-Peeters, Marienke van Middelkoop, Bart W Koes, Arianne P Verhagen
BACKGROUND: Running injuries are very common. Risk factors for running injuries are not consistently described across studies and do not differentiate between runners of long- and short distances within one cohort. OBJECTIVES: The aim of this study is to determine risk factors for running injuries in recreational long- and short distance runners separately. DESIGN: A prospective cohort study. METHODS: Recreational runners from four different running events are invited to participate...
April 28, 2018: Musculoskeletal Science & Practice
https://www.readbyqxmd.com/read/29722253/running-economy-and-energy-cost-of-running-with-backpacks
#5
Volker Scheer, Leoni Cramer, Hans-Christian Heitkamp
BACKGROUND: Running is a popular recreational activity and additional weight is often carried in backpacks on longer runs. Our aim was to examine running economy and other physiological parameters while running with a 1kg and 3 kg backpack at different submaximal running velocities. METHODS: 10 male recreational runners (age 25 ± 4.2 years, VO2peak 60.5 ± 3.1 ml·kg-1·min-1) performed runs on a motorized treadmill of 5 minutes durations at three different submaximal speeds of 70, 80 and 90% of anaerobic lactate threshold (LT) without additional weight, and carrying a 1kg and 3 kg backpack...
May 2, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29644086/is-recreational-running-associated-with-earlier-delivery-and-lower-birth-weight-in-women-who-continue-to-run-during-pregnancy-an-international-retrospective-cohort-study-of-running-habits-of-1293-female-runners-during-pregnancy
#6
Katy Kuhrt, Mark Harmon, Natasha L Hezelgrave, Paul T Seed, Andrew H Shennan
Background: Increasingly, women of reproductive age participate in recreational running, but its impact on pregnancy outcome is unknown. We investigated whether running affects gestational age at delivery and birth weight as indicators of cervical integrity and placental function, respectively. Methods: 1293 female participants were recruited from parkrun, which organises weekly runs involving 1.25 million runners across 450 parks worldwide. Those under 16 or unable to provide outcome data were excluded...
2018: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/29643999/sympatho-adrenergic-activation-by-endurance-exercise-effect-on-metanephrines-spillover-and-its-role-in-predicting-athlete-s-performance
#7
Elisa Danese, Cantor Tarperi, Gian Luca Salvagno, Alessandra Guzzo, Fabian Sanchis-Gomar, Luca Festa, Luciano Bertinato, Martina Montagnana, Federico Schena, Giuseppe Lippi
Background: The sympatho-adrenergic activation during exercise is implicated in many cardiovascular respiratory and metabolic adaptations which have been thought to partially explain the different levels of performance observed between trained and untrained subjects. To date, no evidence exists about the association between competition performance and markers of "acute stress response". We designed this study to investigate; (i) the acute sympatho-adrenergic activation during endurance exercise in recreational runners by measuring plasma levels of free metanephrine (MN) and normethanephrine (NMN) before and after a half-marathon run; (ii) the association between the metanephrines levels and the running time...
March 20, 2018: Oncotarget
https://www.readbyqxmd.com/read/29614465/running-at-submaximal-speeds-the-role-of-the-intact-and-prosthetic-limbs-for-trans-tibial-amputees
#8
Siobhan C Strike, Daniela Acrone, Michael Orendurff
BACKGROUND: Dynamic Elastic Response prostheses are designed absorb and return strain energy in running. Past research has focused on running prostheses with a single toe spring designed for high speeds. RESEARCH QUESTION: To determine how runners with amputation modulate the ground reaction force of each limb to run at different speeds using a general-purpose dynamic prosthesis which has a heel spring. METHODS: Overground running data were collected in 16 recreational runners (8 transtibial amputee using their own BladeXT prosthesis and 8 controls) using Vicon Nexus V...
March 27, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29599878/understanding-trail-runners-activity-on-online-community-forums-an-inductive-analysis-of-discussion-topics
#9
Nadège Rochat, Denis Hauw, Gaëlle Gür, Ludovic Seifert
Recreational trail runners often participate in online community forums where they can freely read posted messages, join discussions and/or introduce new discussion topics. This tool can enhance learning as runners connect with other trail runners and reflect on how they can better organize their own practice. Studying forum activity would provide greater insight into the relationship between field practice and dedicated forums. The aim of this study was therefore to detect the topics discussed online by trail runners in order to understand how they collectively look for solutions that help them adapt to issues that emerge during actual practice...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599872/responsiveness-of-the-countermovement-jump-and-handgrip-strength-to-an-incremental-running-test-in-endurance-athletes-influence-of-sex
#10
Felipe García-Pinillos, Pedro Delgado-Floody, Cristian Martínez-Salazar, Pedro Á Latorre-Román
The present study analyzed the acute effects of an incremental running test on countermovement jump (CMJ) and handgrip strength performance in endurance athletes, considering the effect of post-exercise recovery time and sex. Thirty-three recreationally trained long-distance runners, 20 men and 13 women, participated voluntarily in this study. The participants performed the Léger test, moreover, the CMJ and handgrip strength tests were carried out before and after the running test and during different stages of recovery (at the 1st min of recovery (posttest1), 5th min of recovery (posttest2), and 10th min of recovery (posttest3))...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29599724/age-predicted-maximal-heart-rate-in-recreational-marathon-runners-a-cross-sectional-study-on-fox-s-and-tanaka-s-equations
#11
Pantelis T Nikolaidis, Thomas Rosemann, Beat Knechtle
Age-based prediction equations of maximal heart rate (HRmax ), such as the popular formulas Fox's 220-age, or Tanaka's 208-0.7 × age, have been widely used in various populations. Surprisingly, so far these equations have not been validated in marathon runners, despite the importance of the role of HRmax for training purposes in endurance running. The aim of the present study was to examine the validity of Fox and Tanaka equations in a large sample of women and men recreational marathon runners. Participants ( n = 180, age 43...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29594521/cortical-neural-arousal-is-differentially-affected-by-type-of-physical-exercise-performed
#12
Nicholas J Hanson, Lindsey E Short, Lauren T Flood, Nicholas P Cherup, Michael G Miller
Critical flicker frequency (CFF) threshold is a visual discrimination task designed to assess cortical neural arousal, where higher values are associated with increased information processing and improved cognitive function. Previous studies using CFF assessments before and after exercise have only used one type of exercise (e.g., short, fatiguing, steady state, time to exhaustion, etc.). Therefore, the purpose of this study was to determine the effect of exercise type and intensity on neural arousal. 22 recreational runners (10 men, 12 women; age 25 ± 6 years) volunteered to participate in the study...
March 28, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29584528/the-cortisol-awakening-response-is-associated-with-training-load-in-endurance-runners
#13
Travis Anderson, Amy R Lane, Anthony C Hackney
The cortisol awakening response (CAR) is commonly used as a marker of psychological stress, however it is unknown whether CAR is affected by regular physical exercise induced stress. PURPOSE: Therefore, the purpose of this study was to assess the relationship between training load and CAR. METHODS: Recreational endurance athletes were recruited from local club running groups. Subjects (n = 15) completed training logs for two weeks, with various training loads, including psychometric analysis (RESTQ-Sport)...
March 27, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29576960/effect-of-fatigue-and-gender-on-kinematics-and-ground-reaction-forces-variables-in-recreational-runners
#14
Bruno Bazuelo-Ruiz, Juan V Durá-Gil, Nicolás Palomares, Enrique Medina, Salvador Llana-Belloch
The presence of fatigue has been shown to modify running biomechanics. Overall in terms of gender, women are at lower risk than men for sustaining running-related injuries, although it depends on the factors taken into account. One possible reason for these differences in the injury rate and location might be the dissimilar running patterns between men and women. The purpose of this study was to determine the effect of fatigue and gender on the kinematic and ground reaction forces (GRF) parameters in recreational runners...
2018: PeerJ
https://www.readbyqxmd.com/read/29547032/characteristics-of-plantar-pressures-and-related-pain-profiles-in-elite-sprinters-and-recreational-runners
#15
Tong-Hsien Chow, Yih-Shyuan Chen, Jia-Chang Wang
BACKGROUND: Plantar pressure measurement is effective for assessing plantar loading and can be applied to evaluating foot performance. We sought to explore the characteristics of plantar pressures in elite sprinters and recreational runners during static standing and walking. METHODS: Arch index (AI) values, regional plantar pressure distributions (PPDs), and footprint characteristics were examined in 80 elite sprinters and 90 recreational runners using an optical plantar pressure measurement system...
January 2018: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/29534444/protein-supplementation-during-or-following-a-marathon-run-influences-post-exercise-recovery
#16
Michael J Saunders, Nicholas D Luden, Cash R DeWitt, Melinda C Gross, Amanda Dillon Rios
The effects of protein supplementation on the ratings of energy/fatigue, muscle soreness [ascending (A) and descending (D) stairs], and serum creatine kinase levels following a marathon run were examined. Variables were compared between recreational male and female runners ingesting carbohydrate + protein (CP) during the run (CPDuring , n = 8) versus those that were consuming carbohydrate (CHODuring, n = 8). In a second study, outcomes were compared between subjects who consumed CP or CHO immediately following exercise [CPPost ( n = 4) versus CHOPost ( n = 4)]...
March 10, 2018: Nutrients
https://www.readbyqxmd.com/read/29529927/textured-insoles-reduce-vertical-loading-rate-and-increase-subjective-plantar-sensation-in-overground-running
#17
Michael Wilkinson, Alistair Ewen, Nicholas Caplan, David O'Leary, Neil Smith, Richard Stoneham, Lee Saxby
The effect of textured insoles on kinetics and kinematics of overground running was assessed. 16 male injury-free-recreational runners attended a single visit (age 23 ± 5 yrs; stature 1.78 ± 0.06 m; mass 72.6 ± 9.2 kg). Overground 15-m runs were completed in flat, canvas plimsolls both with and without textured insoles at self-selected velocity on an indoor track in an order that was balanced among participants. Average vertical loading rate and peak vertical force (Fpeak ) were captured by force platforms...
March 12, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29527322/run-clever-no-difference-in-risk-of-injury-when-comparing-progression-in-running-volume-and-running-intensity-in-recreational-runners-a-randomised-trial
#18
Daniel Ramskov, Sten Rasmussen, Henrik Sørensen, Erik Thorlund Parner, Martin Lind, Rasmus Oestergaard Nielsen
Background/aim: The Run Clever trial investigated if there was a difference in injury occurrence across two running schedules, focusing on progression in volume of running intensity (Sch-I) or in total running volume (Sch-V). It was hypothesised that 15% more runners with a focus on progression in volume of running intensity would sustain an injury compared with runners with a focus on progression in total running volume. Methods: Healthy recreational runners were included and randomly allocated to Sch-I or Sch-V...
2018: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/29509644/mesocycles-with-different-training-intensity-distribution-in-recreational-runners
#19
Christoph Zinner, Daniela Schäfer Olstad, Billy Sperlich
PURPOSE: The aim was to compare mesocycles with progressively increasing workloads and varied training intensity distribution (TID), i.e. high-intensity (HIGH, > 4 mmol·L blood lactate), low-intensity (LOW, < 2 mmol·L blood lactate) or a combination of HIGH and LOW (referred to as "polarized", POL) on 5000-m running time and key components of endurance performance in recreational runners. METHODS: Forty-two runners (peak oxygen uptake (VO2peak): 45...
March 5, 2018: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29496686/chronic-osteomyelitis-of-the-tibia-in-a-runner-catastrophic-consequences-of-shin-splints
#20
Yunes Nadim Hammad, Abigail Johnson, Alan Norrish
Medial tibial stress syndrome and chronic osteomyelitis are conditions that are traditionally thought to affect very different patient groups. We present a case of shin splints in a recreational long-distance runner, complicated by chronic osteomyelitis of the tibia. This is a unique case in which the microtrauma resulting from shin splints was implicated as an entry point for bacterial infection into the bone. Clinical evaluation and bone biopsy culture results indicated haematogenous spread of bacteria originating from the oral cavity...
March 1, 2018: BMJ Case Reports
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