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International Journal of Sports Medicine

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https://www.readbyqxmd.com/read/29788511/training-effects-of-alternated-and-pulsed-currents-on-the-quadriceps-muscles-of-athletes
#1
Pedro Oliveira, Karenina Arrais Guida Modesto, Martim Bottaro, Nicolas Babault, João Luiz Quagliotti Durigan
The aim of the study was to evaluate the effects of 6 weeks training with different neuromuscular electrical stimulation (NMES) currents (medium alternated and low-frequency pulsed current) on muscle architecture and neuromuscular performance of competitive athletes. A double-blind controlled and randomized experimental study was carried out with 33 athletes (22.2±2.6 yrs, 74.7±9.8 kg, 176.8±6.0 cm), divided into 3 groups: mid-frequency current (MF, n=12), pulsed current (PC, n=11) and the control group (CG, n=10)...
May 22, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29775989/higher-accuracy-of-the-lactate-minimum-test-compared-to-established-threshold-concepts-to-determine-maximal-lactate-steady-state-in-running
#2
Patrick Wahl, Lukas Zwingmann, Christian Manunzio, Jacob Wolf, Wilhelm Bloch
This study evaluated the accuracy of the lactate minimum test, in comparison to a graded-exercise test and established threshold concepts (OBLA and mDmax) to determine running speed at maximal lactate steady state. Eighteen subjects performed a lactate minimum test, a graded-exercise test (2.4 m·s-1 start,+0.4 m·s-1 every 5 min) and 2 or more constant-speed tests of 30 min to determine running speed at maximal lactate steady state. The lactate minimum test consisted of an initial lactate priming segment, followed by a short recovery phase...
May 18, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29775988/effects-of-different-resistance-training-frequencies-on-fat-in-overweight-obese-older-women
#3
Edilaine F Cavalcante, Alex S Ribeiro, Matheus A do Nascimento, Analiza M Silva, Crisieli M Tomeleri, Hellen C G Nabuco, Fábio L C Pina, Jerry L Mayhew, Marzo E Da Silva-Grigoletto, Danilo R P da Silva, Steven J Fleck, Edilson S Cyrino
AIM: This study compared the effect of different resistance training (RT) frequencies on total, android, gynoid and trunk body fat in overweight/obese older women. METHODS: Fifty-seven overweight/obese older women (66.9±5.3 years and 39.9±4.9% body fat) were randomly assigned to one of three groups: a group performing RT twice a week (G2X), a group performing RT three times a week (G3X), or a non-exercise control group (CG). Both training groups performed the same 12-week RT program consisting of 8 exercises that trained all major muscle groups...
May 18, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29775987/acute-effect-of-interval-walking-on-arterial-stiffness-in-healthy-young-adults
#4
Takanobu Okamoto, Seok-Ki Min, Mikako Sakamaki-Sunaga
The purpose of this study was to determine the acute effects of interval walking (IW) on arterial stiffness. The participants in this study were 14 healthy men and women (age 27.5±3.8 y). Carotid-femoral pulse wave velocity (cfPWV) was measured using an automatic oscillometric device at 30 min before (baseline) and at 30 and 60 min after walking. Participants repeated five sets of 3-min walks at 30% and 70% of maximum aerobic capacity for a total of 6 min per set in the IW trial. The participants also walked for 30 min at 50% (moderate intensity) of maximum aerobic capacity in a continuous walking (CW) trial...
May 18, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29775986/effects-of-two-training-programs-on-transcriptional-levels-of-neurotrophins-and-glial-cells-population-in-hippocampus-of-experimental-multiple-sclerosis
#5
Maryam Naghibzadeh, Rouhollah Ranjbar, Mohammad Reza Tabandeh, Abdolhamid Habibi
The aim of the present study was to investigate the effects of high-intensity interval training (HIIT) versus low-intensity continuous training (LICT) on transcriptional levels of neurotrophic factors and oligodendrocyte/microglia cell loss in a cuprizone (CP) induced animal model of demyelination. Male C57BL/6 mice were assigned to six groups: control (C), cuprizone-induced demyelination (CP), interval training (IT), continuous training (CT), IT plus CP (ITCP), and CT plus CP (CTCP). Training programs on the treadmill were performed for four weeks, and then demyelination was induced by feeding mice a diet containing 0...
May 18, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29775985/sensorimotor-exercises-and-enhanced-trunk-function-a-randomized-controlled-trial
#6
Steffen Mueller, Tilman Engel, Juliane Mueller, Josefine Stoll, Heiner Baur, Frank Mayer
The aim of this study was to investigate the effect of a 6-week sensorimotor or resistance training on maximum trunk strength and response to sudden, high-intensity loading in athletes.Forty-three healthy, well-trained participants were randomized into sensorimotor (SMT; n=11), resistance training (RT; n=16) and control groups (CG; n=16). Treatment groups received either sensorimotor training (SMT) or resistance training (RT) for 6 weeks, 3 times a week. At baseline and after 6 weeks of intervention, participants' maximum isokinetic strength in trunk rotation and extension was tested (concentric/eccentric 30°/s)...
May 18, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29775984/static-postural-stability-in-chronic-ankle-instability-an-ankle-sprain-and-healthy-ankles
#7
Yong Ung Kwon
To identify the single leg balance (SLB) test that discriminates among healthy, coper, and chronic ankle instability (CAI) groups and to determine effects of ankle muscles on the balance error scoring system (BESS) among the three populations. 60 subjects (20 per group) performed the SLB test with eyes open (EO) and eyes closed (EC). Normalized mean amplitude (NMA) of the tibia anterior (TA), fibularis longus (FL), and medial gastrocnemius (MG) muscles and BESS were measured while performing the SLB test. The coper group had a lower error score than the CAI group in the EC...
May 18, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29768643/effects-of-resistance-training-and-combined-training-program-on-repeated-sprint-ability-in-futsal-players
#8
Julio Torres-Torrelo, David Rodríguez-Rosell, Ricardo Mora-Custodio, Fernando Pareja-Blanco, Juan Manuel Yañez-García, Juan José González-Badillo
The purpose of this study was to compare the effects of 6 weeks resistance training (RT) with combined RT and loaded change of direction (CD) exercise on muscle strength and repeated sprint ability (RSA) in futsal players. Thirty-four players (age: 23.7±4.1 years; height: 1.77±0.06 m; body mass: 74.1±8.2 kg) were randomly assigned into three groups: full squat group (SG, n=12), combined full squat and CD group (S+CDG, n=12), and control group (CG, n=10). The RT for SG consisted of full squat with low-load (~45-60% 1RM) and low-volume (2-3 sets and 4-6 repetitions), whereas the S+CDG performed the same RT program combined with loaded CD (2-5 sets of 10 s)...
May 16, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29758571/effects-of-a-20-min-nap-post-normal-and-jet-lag-conditions-on-p300-components-in-athletes
#9
Elisabeth Petit, Hubert Bourdin, Grégory Tio, Omer Yenil, Emmanuel Haffen, Fabienne Mougin
Post-lunch sleepiness belongs to biological rhythms. Athletes take a nap to counteract afternoon circadian nadir, in prevision of disturbed sleep. This study examined the effects of brief post-lunch nap on vigilance in young and healthy athletes. The P300 components, physiological and cognitive performances were assessed either after nap or rest, following a night of normal sleep (NSC) or simulated jet lag condition (5-h advance-JLC). P300 wave is the positive deflection at about 300 ms in response to a rare stimulus, representing higher information processing...
May 14, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29758570/acute-hip-abduction-fatigue-on-lumbopelvic-hip-complex-stability-in-softball-players
#10
Jessica Washington, Gabrielle Gilmer, Gretchen Oliver
During an overhead throw, the gluteal muscle group stabilizes the lumbopelvic-hip complex (LPHC), leading to efficient energy transfer from the lower to upper extremity. It has been shown that LPHC instability can lead to throwing pathomechanics. The single leg squat has become a common assessment for LPHC stability, and could be used to determine the effects of fatigue on throwing athletes. The purpose of this study was to determine the effects of an acute abduction fatigue protocol on the LPHC of collegiate softball players via the single leg squat assessment of the leg ipsilateral to the throwing arm...
May 14, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29758569/relation-between-iliopsoas-cross-sectional-area-and-kicked-ball-speed-in-soccer-players
#11
Taku Wakahara, Manabu Chiba
This study aimed to investigate the relationship between the maximal anatomical cross-sectional area (ACSA) of the iliopsoas muscle and ball speed in side-foot and instep kicks. The ACSA of the psoas major and iliacus was measured in 29 male collegiate soccer players by using magnetic resonance imaging. They performed maximal side-foot and instep kicks to a stationary ball. The kicked ball speed was measured with a high-speed camera. Ball speed in the side-foot and instep kicks was significantly correlated with body height (side-foot kick: r=0...
May 14, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29758568/social-media-in-shoulder-elbow-surgery-an-analysis-of-twitter-and-instagram
#12
Prem N Ramkumar, Sergio M Navarro, Margaret M Cornaghie, Heather S Haeberle, Hafsah Hameed, Mark S Schickendantz, Eric T Ricchetti, Joseph P Iannotti
Social media provide a unique method of analyzing outcomes and quality in medicine. The purpose of this observational study was to investigate the nature of social media content related to shoulder and elbow (S&E) surgery posted by patients, surgeons, and hospitals. A public search of Instagram for a two-year period yielded 1,177 patient-related posts. A categorical system assessed the perspective, timing, tone, and content of each post. Twitter accounts of 77 S&E specialists from the top five ranked U...
May 14, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29710370/effects-of-exercise-intensity-on-microvascular-function-in-obese-adolescents
#13
Christopher Morrissey, David Montero, Cecile Raverdy, Delphine Masson, Marie-Jo Amiot, Agnes Vinet
The optimal exercise modality for the improvement of health-related parameters and microvascular function in obese adolescents is not yet fully understood. Therefore, this study aimed to 1) compare the microvascular phenotype of obese and normal-weight adolescents; and 2) to determine the effects of a lifestyle intervention including three months of moderate continuous training (MCT) or high-intensity interval training (HIIT) on health-related parameters and microvascular function in 29 obese adolescents. Body composition, metabolic profile, aerobic fitness and cutaneous blood flow, measured using laser Doppler flowmetry at rest and during post-occlusive reactive hyperemia, were assessed prior to and following lifestyle intervention...
April 30, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29710369/arterial-stiffness-response-to-regular-aerobic-training-in-hypercholesterolemia-patients
#14
Guanghui Liu, Jiasheng Zhao, Yang Cao
Physical exercise increase is confirmed as a fundamental treatment for hypercholesterolemia patients, but the effect on the arterial stiffness and oxidative stress is still unclear. 74 hypercholesterolemia patients were divided into 2 groups. The exercise group received dietary recommendations and a 3-month exercise program, prescribed according to their first cardiopulmonary exercise tests(CPET), while the control group only received dietary recommendations. All patients underwent blood tests, CPET and brachial-ankle pulse wave velocity (baPWV) studies at enrollment and at 3 months' follow-up...
April 30, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29698983/micrornas-in-high-and-low-responders-to-resistance-training-in-breast-cancer-survivors
#15
Amanda D Hagstrom, Joshua Denham
Accounting for one in three cancer diagnoses, breast cancer is the second most commonly diagnosed cancer in women. Exercise has a well-accepted role in the multi-disciplinary approach to rehabilitating breast cancer survivors. Despite the many known benefits of resistance training on women recovering from breast cancer, the molecular mechanisms are poorly understood. MicroRNAs are small non-coding RNAs that have crucial roles in growth and development. Here, we analysed the abundance of 9 miRNAs, with known roles in muscle physiology and some linked to cancer, in serum samples from 24 breast cancer survivors before and after a 16-week resistance training or usual care intervention...
April 26, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29698982/a-fast-track-to-hypoalgesia-the-anaerobic-exercise-effect-on-pain-sensitivity
#16
Gil Samuelly-Leichtag, Einat Kodesh, Yoav Meckel, Irit Weissman-Fogel
Maximal anaerobic exercise, is a short high intensity effort, involves activation of the hypothalamus-pituitary-adrenal axis, and may suggest hypoalgesic effects. In addition, this exercise-induced muscle pain may contribute to hypoalgesia via the pain inhibits pain phenomenon, which is related to the diffuse noxious inhibitory control (DNIC) mechanism. We aimed to investigate whether: 1) a single bout of 30 s maximal anaerobic exercise has an analgesic effect on experimental pain sensitivity; 2) DNIC is the underlying mechanism of anaerobic exercise-induced hypoalgesia (EIH)...
April 26, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29684926/changes-in-phase-angle-and-handgrip-strength-induced-by-suspension-training-in-older-women
#17
Francesco Campa, Analiza Mónica Silva, Stefania Toselli
This study aimed to present a suspension exercise training program suitable for older adults and to verify the effect of 12 weeks of training on handgrip strength (HS) and anthropometric and bioelectrical impedance parameters in older adults. Thirty older women (age 66.1±4.7 years, BMI 30.6±5.3 kg/m2 ) were randomly assigned to one of two groups: a training group (TG, n=15) or a control group (CG, n=15). The TG participated in a 12-week suspension training program, while the CG maintained their normal physical activity habits for the duration of the study...
April 23, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29665614/vo2max-testing-in-trail-runners-is-there-a-specific-exercise-test-protocol
#18
Volker Scheer, Katharina Ramme, Claus Reinsberger, Hans-Christian Heitkamp
Trail running places specific physiological demands on the human body due to its uphill and downhill running sections. We developed and investigated a more sport-specific trail exercise test protocol (inclination and speed incremental protocol), and compared it to two standard exercise test protocols (horizontal step and ramp protocol) in thirteen highly trained trail runners (age 31±6 years, height 179±6.4 cm, weight 69.2±7.9 kg, BMI 21.6±2.1 kg/m2 ). The maximum oxygen uptake (VO2 max) measured during the trail test (62...
April 17, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29665613/the-association-between-self-rated-fitness-and-cardiorespiratory-fitness-in-adults
#19
Karina Gregersen Jensen, Susanne Rosthøj, Allan Linneberg, Mette Aadahl
To assess criterion validity of a single item question on self-rated physical fitness against objectively measured cardiorespiratory fitness. From the Health2008 study 749 men and women between 30 and 60 years of age rated their fitness as excellent, very good, good, fair or poor. Cardiorespiratory fitness was estimated with the watt-max test. Agreement between self-rated and objectively measured physical fitness was assessed by Cohen's weighted kappa coefficient. Correlation was determined by Goodman & Kruskal's gamma correlation coefficient...
April 17, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29665612/differences-in-segmental-speeds-as-a-function-of-maturation-in-youth-baseball-pitchers
#20
Jessica K Washington, Gabrielle G Gilmer, Jeff W Barfield, Sarah S Gascon, Michael G Saper, Jeffrey R Dugas, James R Andrews, Gretchen D Oliver
The purpose of this study was to determine how stride length, segmental sequencing of the pelvis, trunk, humerus, and forearm velocities and accelerations, and the timing of these values change as youth mature. Thirteen youth baseball pitchers participated at three consecutive time points: visit 1 (10.7±1.3 years; 151.8±10.7 cm; 45.0±9.65 kg), visit 2 (11.5±1.6 years; 155.5±11.1 cm; 50.4±10.0 kg), and visit 3 (12.4±1.7 years; 161.5±11.7 cm; 56.4±10.8 kg). Participants executed three pitches for a strike to a catcher...
April 17, 2018: International Journal of Sports Medicine
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