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https://www.readbyqxmd.com/read/27901340/effects-of-a-trail-mountain-race-on-neuromuscular-performance-and-hydration-status-in-trained-runners
#1
Ernest Baiget, Javier Peña, Xantal Borràs, Toni Caparrós, José L López, Francesc Marin, Jordi Coma, Eduard Comerma
BACKGROUND: The aims of this study were (a) to examine the effects of a trail mountain race (TMR) on hydration status and neuromuscular performance of recreational trail runners and (b) to determine the relationship among these parameters, subject's characteristics and competitive performance. METHODS: 35 male recreational trail runners (age, 38.1 ± 9.5 years; height, 177.3 ± 5.8 cm; body mass, 73.8 ± 8.4 kg; mean ± SD) were assessed before and after a 21.1 km TMR...
November 30, 2016: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/27891180/the-effect-of-foot-orthoses-with-forefoot-cushioning-or-metatarsal-pad-on-forefoot-peak-plantar-pressure-in-running
#2
Michaela Hähni, Anja Hirschmüller, Heiner Baur
BACKGROUND: Foot orthoses are frequently used in sports for the treatment of overuse complaints with sufficient evidence available for certain foot-related overuse pathologies like plantar fasciitis, rheumatoid arthritis and foot pain (e.g., metatarsalgia). One important aim is to reduce plantar pressure under prominent areas like metatarsal heads. For the forefoot region, mainly two common strategies exist: metatarsal pad (MP) and forefoot cushioning (FC). The aim of this study was to evaluate which of these orthosis concepts is superior in reducing plantar pressure in the forefoot during running...
2016: Journal of Foot and Ankle Research
https://www.readbyqxmd.com/read/27852157/acute-and-chronic-effects-of-aquatic-treadmill-training-on-land-treadmill-running-kinematics-a-cross-over-and-single-subject-design-approach
#3
Eadric Bressel, Talin J Louder, James P Hoover, Luke C Roberts, Dennis G Dolny
The aim of this study was to determine if selected kinematic measures (foot strike index [SI], knee contact angle and overstride angle) were different between aquatic treadmill (ATM) and land treadmill (LTM) running, and to determine if these measures were altered during LTM running as a result of 6 weeks of ATM training. Acute effects were tested using 15 competitive distance runners who completed 1 session of running on each treadmill type at 5 different running speeds. Subsequently, three recreational runners completed 6 weeks of ATM training following a single-subject baseline, intervention and withdrawal experiment...
November 17, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27812406/pacing-during-an-ultramarathon-running-event-in-hilly-terrain
#4
Hugo A Kerhervé, Tom Cole-Hunter, Aaron N Wiegand, Colin Solomon
PURPOSE: The dynamics of speed selection as a function of distance, or pacing, are used in recreational, competitive, and scientific research situations as an indirect measure of the psycho-physiological status of an individual. The purpose of this study was to determine pacing on level, uphill and downhill sections of participants in a long (>80 km) ultramarathon performed on trails in hilly terrain. METHODS: Fifteen ultramarathon runners competed in a  173 km event (five finished at  103 km) carrying a Global-Positioning System (GPS) device...
2016: PeerJ
https://www.readbyqxmd.com/read/27766135/sex-differences-in-time-perception-during-self-paced-running
#5
Nicholas J Hanson, Janet Buckworth
Time perception during exercise may be affected by chosen intensity, and may also affect enjoyment of exercise and subsequent long-term adherence. However, little is known about how individuals perceive the passage of time during exercise, or if factors such as sex are influential. The purpose of this study was to determine if there are sex related differences in perception of time during a bout of exercise in experienced runners. Twenty-two recreational runners (11 men, 11 women) participated in a bout of treadmill running where they were allowed to select their intensity...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27747777/acute-changes-in-inflammatory-biomarker-levels-in-recreational-runners-participating-in-a-marathon-or-half-marathon
#6
Markus Niemelä, Päivikki Kangastupa, Onni Niemelä, Risto Bloigu, Tatu Juvonen
BACKGROUND: Strenuous physical activity activates the participant's immune responses; however, few studies exist, observing exercise-induced simultaneous changes in mediators of inflammation. METHODS: We examined individual responses in soluble urokinase-type plasminogen activator receptor (suPAR), a marker of immune activation, soluble endocytic receptor for haptoglobin-hemoglobin complexes (CD163), a marker of monocyte-macrophage activation, C-reactive protein (CRP), and pro- and anti-inflammatory cytokines from blood samples drawn at baseline, at 3- and 48-h post-races from recreational runners who successfully completed the marathon (199 ± 8 min, n = 4) or half-marathon (132 ± 4 min, n = 4) run...
December 2016: Sports Medicine—Open
https://www.readbyqxmd.com/read/27704869/caffeine-effects-on-velocity-selection-and-physiological-responses-during-rpe-production
#7
James M Green, Alyssa Olenick, Caroline Eastep, Lee Winchester
Caffeine (CAF) blunts estimated ratings of perceived exertion (RPE) but the effects on RPE production are unclear. This study examined effects of acute caffeine ingestion during treadmill exercise where participants exercised at prescribed RPE 4 and 7. Recreational runners (maximal oxygen consumption = 51.4 ± 9.8 mL·kg(-1)·min(-1)) (n = 16) completed a maximal treadmill test followed by trials where they selected treadmill velocity (VEL) (1% grade) to produce RPE 4 and RPE 7 (10 min each). RPE production trials followed CAF (6 mg·kg(-1)) or placebo (PLA) (counterbalanced) ingestion...
June 30, 2016: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/27699484/running-decreases-knee-intra-articular-cytokine-and-cartilage-oligomeric-matrix-concentrations-a-pilot-study
#8
Robert D Hyldahl, Alyssa Evans, Sunku Kwon, Sarah T Ridge, Eric Robinson, J Ty Hopkins, Matthew K Seeley
INTRODUCTION: Regular exercise protects against degenerative joint disorders, yet the mechanisms that underlie these benefits are poorly understood. Chronic, low-grade inflammation is widely implicated in the onset and progression of degenerative joint disease. PURPOSE: To examine the effect of running on knee intra-articular and circulating markers of inflammation and cartilage turnover in healthy men and women. METHODS: Six recreational runners completed a running (30 min) and control (unloaded for 30 min) session in a counterbalanced order...
October 3, 2016: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/27649760/conservative-management-of-a-femoral-neck-stress-fracture-in-a-female-athlete-a-case-report-and-review-of-the-literature
#9
Ilias Katsougrakis, Alexandros P Apostolopoulos, Samantha Z Tross
UNLABELLED: Femoral-neck stress fractures are relatively rare and may present as sports-related injuries. The presentation is variable, and prompt diagnosis facilitates the earliest return to pre-morbid functional activity levels. Delayed detection may precipitate femoral non-union or avascular necrosis, resulting in long-term functional deficit. AIMS: We describe the clinical, diagnostic and therapeutic approach of a femoral-neck stress fracture that occurred in a 28-year-old female recreational runner...
2016: Journal of Long-term Effects of Medical Implants
https://www.readbyqxmd.com/read/27628199/the-influence-of-the-regression-model-and-final-speed-criteria-on-the-reliability-of-lactate-threshold-determined-by-the-dmax-method-in-endurance-trained-runners
#10
Júlio César Camargo Alves, Cecília Segabinazi Peserico, Geraldo Angelo Nogueira, Fabiana Andrade Machado
Few studies verified the reliability of the lactate threshold determined by Dmax method (LTDmax) in runners and it remains unclear the effect of the regression model and the final speed on the reliability of LTDmax. This study aimed to examine the test-retest reliability of the speed at LTDmax in runners, considering the effects of the regression models (exponential-plus-constant vs third-order polynomial) and final speed criteria (complete vs proportional). Seventeen male, recreational runners performed 2 identical incremental exercise tests, with increments of 1 km·h(-1) each for 3 min on treadmill to determine peak treadmill speed (Vpeak) and lactate threshold...
October 2016: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/27620622/high-rate-of-return-to-running-for-athletes-after-hip-arthroscopy-for-the-treatment-of-femoroacetabular-impingement-and-capsular-plication
#11
David M Levy, Benjamin D Kuhns, Rachel M Frank, Jeffrey S Grzybowski, Kirk A Campbell, Sara Brown, Shane J Nho
BACKGROUND: Femoroacetabular impingement (FAI) is most commonly diagnosed in athletes who sustain repetitive flexion loading to their hips. No studies to date have focused solely on patients' return-to-running ability after hip arthroscopy. PURPOSE: To evaluate patients' ability to return to running after hip arthroscopy for FAI and capsular plication. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: Clinical data were retrospectively retrieved for 51 consecutive patients with FAI (22 men, 29 women) who had undergone hip arthroscopy for the treatment of FAI and identified themselves as recreational or competitive runners on intake forms...
September 12, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27609306/individual-responses-in-biomarkers-of-health-after-marathon-and-half-marathon-running-is-age-a-factor-in-troponin-changes
#12
Markus Niemelä, Päivikki Kangastupa, Onni Niemelä, Risto Bloigu, Tatu Juvonen
Although strenuous physical activity is known to cause notable perturbations in blood chemistries, only few studies exist observing exercise-induced simultaneous changes in biomarkers of health status. We compared markers of muscle, cardiovascular, renal, hepatic and inflammatory status at baseline and at 3-h and at 48-h postrace in recreational runners who successfully completed either a marathon (mean age 27 ± 13 years, finishing time 199 ± 8 min, n = 4) or half-marathon (mean age 38 ± 13 years, finishing time 131 ± 6 min, n = 6) race...
November 2016: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/27593384/relationship-between-foot-strike-pattern-running-speed-and-footwear-condition-in-recreational-distance-runners
#13
Roy T H Cheung, Rodney Y L Wong, Tim K W Chung, R T Choi, Wendy W Y Leung, Diana H Y Shek
Compared to competitive runners, recreational runners appear to be more prone to injuries, which have been associated with foot strike patterns. Surprisingly, only few studies had examined the foot strike patterns outside laboratories. Therefore, this study compared the foot strike patterns in recreational runners at outdoor tracks with previously reported data. We also investigated the relationship between foot strike pattern, speed, and footwear in this cohort. Among 434 recreational runners analysed, 89...
September 4, 2016: Sports Biomechanics
https://www.readbyqxmd.com/read/27584341/effect-of-a-6-wk-running-training-programme-using-the-self-paced-vo2max-protocol-in-recreational-runners-1302-board-5-june-2-8-00-am-10-00-am
#14
James S Hogg, Sarah L Coakley, James G Hopker, Alexis R Mauger
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27581179/effect-of-body-weight-support-running-on-lower-limb-biomechanics
#15
Michael Neal, Neil Fleming, Lindsey Eberman, Kenneth Games, Jeremiah Vaughan
Study Design Controlled laboratory study. Background Body-weight-support (BWS) running is increasing in popularity, despite limited evidence of its effects on running mechanics. Objectives To determine the effect of increasing BWS on lower-limb biomechanics during lower-body positive-pressure (LBPP) treadmill running. Methods Fourteen male recreational runners completed 15 randomized trials on an LBPP treadmill at 5 levels of BWS and 3 velocities (1-minute trials with 3-minute recovery). Knee and ankle kinematic data were recorded continuously via electrogoniometry...
September 2016: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/27574739/neuromuscular-adaptations-to-same-session-combined-endurance-and-strength-training-in-recreational-endurance-runners
#16
M Schumann, P Pelttari, K Doma, L Karavirta, K Häkkinen
This study examined neuromuscular adaptations in recreational endurance runners during 24 weeks of same-session combined endurance and strength training (E+S, n=13) vs. endurance training only (E, n=14). Endurance training was similar in the 2 groups (4-6x/week). Additional maximal and explosive strength training was performed in E+S always after incremental endurance running sessions (35-45 min, 65-85% HRmax). Maximal dynamic leg press strength remained statistically unaltered in E+S but decreased in E at week 24 (-5±5%, p=0...
August 30, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27570626/an-empirical-study-of-race-times-in-recreational-endurance-runners
#17
Andrew J Vickers, Emily A Vertosick
BACKGROUND: Studies of endurance running have typically involved elite athletes, small sample sizes and measures that require special expertise or equipment. METHODS: We examined factors associated with race performance and explored methods for race time prediction using information routinely available to a recreational runner. An Internet survey was used to collect data from recreational endurance runners (N = 2303). The cohort was split 2:1 into a training set and validation set to create models to predict race time...
2016: BMC Sports Science, Medicine and Rehabilitation
https://www.readbyqxmd.com/read/27530134/the-impact-of-moderate-distance-recreational-running-and-ageing-on-cardiac-physiology
#18
Jonathan H Kim, Yi-An Ko, Jeff Hedley, James MacNamara, Mosaab Awad, William Taylor, Sean Healy, Hiroshi Aida, Ngoc-Anh Le, Peter W Wilson, Melissa White, Laurence S Sperling, Joseph S Wilson, Aaron L Baggish
OBJECTIVE: Exercise-induced cardiac dysfunction and corollary biomarker release have been documented following long-distance running events. To what degree these processes occur during shorter distance running events is unknown. METHODS: 72 healthy recreational runners (54% male/46% female) recruited by age (group 1 (18-20 years old, N=19); group 2 (45-50 years old, N=27); group 3 (70-75 years old, N=26)) were studied with echocardiography and biochemical profiling during participation in a 10 km running race...
August 16, 2016: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/27513169/hip-extensor-strength-trunk-posture-and-use-of-the-knee-extensor-muscles-during-running
#19
Hsiang-Ling Teng, Christopher M Powers
CONTEXT: Diminished hip-muscle performance has been proposed to contribute to various knee injuries. OBJECTIVE: To determine the association between hip-extensor muscle strength and sagittal-plane trunk posture and the relationships among hip-extensor muscle strength and hip- and knee-extensor work during running. DESIGN: Descriptive laboratory study. SETTING: Musculoskeletal biomechanical laboratory. PATIENTS OR OTHER PARTICIPANTS: A total of 40 asymptomatic recreational runners, 20 men (age = 27...
July 2016: Journal of Athletic Training
https://www.readbyqxmd.com/read/27476066/intrarater-reliability-of-hand-held-dynamometry-in-measuring-lower-extremity-isometric-strength-using-a-portable-stabilization-device
#20
Steven M Jackson, M Samuel Cheng, A Russell Smith, Morey J Kolber
Hand held dynamometry (HHD) is a more objective way to quantify muscle force production (MP) compared to traditional manual muscle testing. HHD reliability can be negatively impacted by both the strength of the tester and the subject particularly in the lower extremities due to larger muscle groups. The primary aim of this investigation was to assess intrarater reliability of HHD with use of a portable stabilization device for lower extremity MP in an athletic population. Isometric lower extremity strength was measured for bilateral lower extremities including hip abductors, external rotators, adductors, knee extensors, and ankle plantar flexors was measured in a sample of healthy recreational runners (8 male, 7 females, = 30 limbs) training for a marathon...
July 21, 2016: Manual Therapy
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