Fatigue-induced Landing Alterations in ACL Reconstructed Athletes after Return-to-Sport
Int J Sports Med DOI: 10.1055/a-2108-5219At the time of return-to-sport, anterior cruciate ligament reconstructed athletes still show altered neuromechanics in their injured leg during single leg hopping tasks. Part of these alterations can be magnified when these athletes are fatigued. So far, little is known whether fatigue-induced landing alterations persist after return-to-sport. Therefore, the aim of this study was to evaluate whether these alterations persist in the six months following return-to-sport. Sixteen anterior cruciate ligament reconstructed athlet...
Source: International Journal of Sports Medicine - July 25, 2023 Category: Sports Medicine Authors: Willems, Miel Gilson, Laurens Verschueren, Sabine Vanrenterghem, Jos Staes, Filip Vandenneucker, Hilde Claes, Steven Smeets, Annemie Tags: Orthopedics & Biomechanics Source Type: research

Previous Injury and Lower Well-being Increase Injury Risk in Female Adolescent Athletes
Int J Sports Med DOI: 10.1055/a-2108-6463Several risk factors for injury have been suggested in female elite athletes. However, there is a lack of prospective studies in young female athletes where multiple risk factors have been studied. The aim of this study was to identify risk factors for injury in female adolescent elite athletes. Substantial injuries were monitored in 222 athletes using the validated Oslo Sports Trauma Research Centre Questionnaire over 20 weeks. Over 20 potential risk factors were explored. Based on a binomial generalized linear mixed model...
Source: International Journal of Sports Medicine - July 25, 2023 Category: Sports Medicine Authors: Ekenros, Linda Frid én, Cecilia von Rosen, Philip Tags: Orthopedics & Biomechanics Source Type: research

Relaxed Alert Electroencephalography Screening for Mild Traumatic Brain Injury in Athletes
This study was designed as a proof-of-principle feasibility trial for athletic trainers at a sports facility to generate electroencephalograms (EEGs) from student athletes for discriminating (mTBI) associated EEGs from uninjured ones. A total of 47 EEGs were generated, with 30 athletes recruited at baseline (BL) pre-season, after a concussive injury (IN), and post-season (PS). Outcomes included: 1) visual analyses of EEGs by a neurologist; 2) support vector machine (SVM) classification for inferences about whether particular groups belonged to the three ...
Source: International Journal of Sports Medicine - July 25, 2023 Category: Sports Medicine Authors: Abdul Baki, Samah Zakeri, Zohreh Chari, Geetha Fenton, Andr é Omurtag, Ahmet Tags: Clinical Sciences Source Type: research

Protein Turnover in Skeletal Muscle: Looking at Molecular Regulation towards an Active Lifestyle
Int J Sports Med DOI: 10.1055/a-2044-8277Skeletal muscle is a highly plastic tissue, able to change its mass and functional properties in response to several stimuli. Skeletal muscle mass is influenced by the balance between protein synthesis and breakdown, which is regulated by several signaling pathways. The relative contribution of Akt/mTOR signaling, ubiquitin-proteasome pathway, autophagy among other signaling pathways to protein turnover and, therefore, to skeletal muscle mass, differs depending on the wasting or loading condition and muscle type. By ...
Source: International Journal of Sports Medicine - July 17, 2023 Category: Sports Medicine Authors: Ferreira, Rita Pinho Duarte, Jose Alberto Tags: Review Source Type: research

Network Meta-analysis of Combined Strength and Power Training for Countermovement Jump Height
Int J Sports Med DOI: 10.1055/a-2105-0540Combined strength and power training in a training program is considered to improve the vertical jump, which is frequently quantified using the countermovement jump height. It is not yet clear whether one of the different training set structures, such as complex training, contrast training, compound training and traditional training, is superior to another. The aim of this review is to describe and assess the comparative effects of the set structures on countermovement jump height in healthy subjects. A systematic review an...
Source: International Journal of Sports Medicine - July 17, 2023 Category: Sports Medicine Authors: Brandt, Maximilian Beinert, Sibylle Alfuth, Martin Tags: Review Source Type: research

The Impact of Sport-discipline and Sex on Physical Fitness and Bone Markers in Athletes
This study was performed to determine the impact of sex and sport-discipline on physical fitness and bone markers in young sub-elite track and field athletes. One hundred and forty-four track and field sub-elite athletes (78 males aged 17.8±1.6 years; 66 females aged 17.2±1.9 years) volunteered to participate in this study and were categorized according to their disciplines in endurance (EG: n=67) or power athletes (PG: n=77). A significant main effect of sex was observed for C-telopeptide type I collagen (CTx) (F=11.37; p<0.001; η2=0.10, ...
Source: International Journal of Sports Medicine - July 10, 2023 Category: Sports Medicine Authors: Nebigh, Ammar Touhami, Imed Chtara, Mokhtar Govindasamy, Karuppasamy Surech, Chandrababu Hage, Rawad El Saeidi, Ayoub Boullosa, Daniel Clark, Cain C.T. Granacher, Urs Zouhal, Hassane Tags: Training & Testing Source Type: research

Relationship between Euthyroidism and Muscle Mass and Strength: A Systematic Review
Int J Sports Med DOI: 10.1055/a-2093-2881Thyroid hormones play a crucial role in skeletal muscle development, suggesting that thyroid function may influence muscle mass and muscle strength, which are both fundamental health-related indicators of several age-related consequences. However, whether there is a relationship between thyroid hormones, muscle mass, and muscle strength in individuals without thyroid dysfunctions is still unknown. Therefore, this systematic review aims to investigate whether thyroid hormones are related to muscle mass and strength parameter...
Source: International Journal of Sports Medicine - July 10, 2023 Category: Sports Medicine Authors: Greco, Francesca Moulton, Chantalle Antinozzi, Cristina Lista, Marco Di Luigi, Luigi Dimauro, Ivan Sgr ò, Paolo Tags: Review Source Type: research

Acute and Chronic Effects of Strength Training on Plasma Levels of Adipokines in Man
Int J Sports Med DOI: 10.1055/a-2079-1607Adipose tissue is specialized cells that produce and release adipokines. Exercise may modulate adipokine production in adipocytes. The aim of this longitudinal study was to evaluate the acute and chronic effects of strength training (ST) on plasma levels of adiponectin, leptin, and resistin. Twelve untrained young male participants (23.42±2.67 years) were selected. The training protocol consisted of 3 exercises, with 3 sets of 65% of 1RM (one-repetition maximum) with pause of 90 s between sets with duration of ...
Source: International Journal of Sports Medicine - July 10, 2023 Category: Sports Medicine Authors: Barroso, Luc élia Scarabeli Silva Faria, Marcelo Henrique Salviano Souza-Gomes, Antonio Felipe Barros, Jo ão Luís Vieira Monteiro Kakehasi, Adriana Maria Vieira, Erica Leandro Marciano Sim ões e Silva, Ana Cristina Nunes-Silva, Alben á Tags: Genetics & Molecular Biology Source Type: research

Determinants of Dual-task Gait Speed in Older Adults with and without Parkinson ’s Disease
Int J Sports Med DOI: 10.1055/a-2085-1429Mobility difficulties for people with Parkinson’s disease (PwPD) are more pronounced when they perform a simultaneous cognitive task while walking. Although it is known that neurodegeneration results in widespread motor and brain impairments, few studies have comprehensively examined possible physical and mental determinants of dual task walking in PwPD. In this cross-sectional study, we aimed to investigate if and how muscle strength (sit-to-stand 30-sec test), cognition (mini-mental state examination) and functionality ...
Source: International Journal of Sports Medicine - July 10, 2023 Category: Sports Medicine Authors: Ivaniski-Mello, Andr é M üller, Vivian Torres de Liz Alves, Lucas Casal, Marcela Zimmermann Haas, Aline Nogueira Correale, Luca Kanitz, Ana Carolina Martins, Val éria Feijó Gon çalves, Andréa Kruger Martinez, Fl ávia Gomes Peyr é-Tartaruga, Leonar Tags: Clinical Sciences Source Type: research

Correction: Acute Responses in Blood Flow Restriction Low-intensity Aerobic Training: A Meta-analysis
Int J Sports Med 2023; 44: e2-e2 DOI: 10.1055/a-2104-4794 Georg Thieme Verlag Rüdigerstraße 14, 70469 Stuttgart, GermanyArticle in Thieme eJournals: Table of contents  |  Full text (Source: International Journal of Sports Medicine)
Source: International Journal of Sports Medicine - July 6, 2023 Category: Sports Medicine Authors: de Queiros, Victor Sabino Rolnick, Nicholas Sabag, Angelo de Fran ça, Ingrid Martins Wilde, Phelipe Vieira, Jo ão Guilherme Reis, Victor Machado Formiga, Magno F. Cabral, Breno Guilherme de Ara újo Tinôco Dantas, Paulo Moreira Silva Tags: Erratum Source Type: research

Duration Effects on Wingate and Functional Power Threshold Test Outputs in Female Cyclists
In conclusion, the time variations assessed do not alters power outcomes in female cyclists. However, higher acute fatigue can be observed in the WAnT of 30 sec, which suggests the use of the test of 20 sec to allow continue training afterwards. [...] Georg Thieme Verlag Rüdigerstraße 14, 70469 Stuttgart, GermanyArticle in Thieme eJournals: Table of contents  |  Abstract  |  Full text (Source: International Journal of Sports Medicine)
Source: International Journal of Sports Medicine - July 4, 2023 Category: Sports Medicine Authors: Sendra-Perez, Carlos Oficial-Casado, Fran Encarnaci ón-Martínez, Alberto Priego-Quesada, Jose Ignacio Tags: Training & Testing Source Type: research

Positional Differences in Muscle-to-bone Ratio in National Football League Players
Int J Sports Med DOI: 10.1055/a-2089-8068The purpose of the present study was to examine the muscle-to-bone ratio (MBR) in National Football League (NFL) players. Three hundred and forty-six NFL players had their total body lean, fat and bone masses determined using dual X-ray absorptiometry and were compared to 228 age-matched, healthy male controls. Compared to the control group, NFL players had a significantly lower percent total body fat (17.90±6.92 vs. 22.93±8.96%, p=0.053), but significantly greater total fat mass (19.76±11.29 vs. 17.84±12.11...
Source: International Journal of Sports Medicine - June 6, 2023 Category: Sports Medicine Authors: Dengel, Donald R Evanoff, Nicholas G Tags: Training & Testing Source Type: research

Epidemiology of International Match Injuries in Scottish Rugby: A Prospective Cohort Study
Int J Sports Med DOI: 10.1055/a-2038-3452Fifteen-a-side rugby union (“rugby”) is a full-contact sport played separately by men and women, with large injury incidences reported previously. Context specific injury surveillance fulfils governing bodies’ duty of care to understand risks to player welfare, yet no contemporary match injury epidemiology studies exist for international players in Scotland. The current study therefore aimed to describe the incidence, severity, burden and nature of match injuries sustained by Scotland’s men’s and women...
Source: International Journal of Sports Medicine - June 6, 2023 Category: Sports Medicine Authors: Bailey, Stuart John Martindale, Russell Engebretsen, Lars Robson, James Peter Palmer, Debbie Tags: Training & Testing Source Type: research

Validity of Weekly and Monthly Perceived Exertion in Runners
Int J Sports Med DOI: 10.1055/a-2058-8049The development of the rating of perceived exertion (RPE) enables the easy assessment of runners’ training strain as well as training load (TL). However, the long-term and retrospective validity of TL assessment using RPE scales still needs further investigation. Therefore, this study examined the validity of weekly and monthly ratings of perceived exertion (W-RPE, M-RPE) in assessing TL in runners. Healthy adult runners (n=53) rated perceived exertion using the modified category-ratio 10 (CR-10) scale for each week of a ...
Source: International Journal of Sports Medicine - June 6, 2023 Category: Sports Medicine Authors: Arantes Bertochi, Gabriel Felipe Mota, Gustavo R Haile, Luke Marocolo, Moacir Eidi Sasaki, Jeffer Tags: Training & Testing Source Type: research

Relationship Between Body Size and Skeletal Age with Muscle Damage in Young Soccer Players
This study verified the relationship between body size and skeletal age (SA) with the behavior of blood markers of muscle damage and delayed onset muscle soreness (DOMS) after a soccer match in the U-13 and U-15 categories. The sample consisted of 28 soccer players in the U-13 and 16 in the U-15 categories. Creatine kinase (CK), lactate dehydrogenase (LDH), and DOMS were evaluated up to 72 h after the match. Muscle damage was elevated at 0 h in U-13, and from 0 h to 24 h in U-15. DOMS increased from 0 h to 72 h in U-13 and from 0 h to 48 ...
Source: International Journal of Sports Medicine - June 5, 2023 Category: Sports Medicine Authors: Ramos-Silva, Luiz Fernando Costa, Julio Cesar Borges, Paulo Henrique Moura, Felipe A Deminice, Rafael de Oliveira, Donizete C ícero Xavier Osiecki, Raul Vaz Ronque, Enio Ricardo Tags: Training & Testing Source Type: research