Journals International Journal of Sport...

International Journal of Sports Medicine
Hye Bin Gwag, Young-Joo Kim, Kyoung-Min Park
Exercise-induced hypertension (EIH) is thought to be associated with increased cardiovascular (CV) risks. However, no previous studies have investigated the effects of EIH on CV systems in marathon runners without CV risk factors using both 24-hr ambulatory blood pressure (BP) monitoring and exercise stress echocardiography (ESE). This study firstly described differences in CV adaptations according to EIH assessed by both exams. Marathon runners between 35 and 64 years of age without CV risk factors were eligible...
May 21, 2024: International Journal of Sports Medicine
Danica Janicijevic, Deniz Senturk, Zeki Akyildiz, Yaodong Gu, Amador García-Ramos
This study aimed to determine whether the optimal minimal velocity threshold (MVT) provides more precise estimates of one-repetition maximum (1RM) in the hexagonal barbell deadlift (HBD) than the general and individual MVTs. The 1RM of 27 resistance-trained males were predicted using three types of MVT: (i) General MVT: averaged across subjects' velocity of the 1RM trial (0.25 m·s-1), (ii) individual MVT: velocity attained during the 1RM trial, and (iii) Optimal MVT: MVT that eliminated the differences between the actual and predicted 1RM...
May 20, 2024: International Journal of Sports Medicine
Alysson Enes, Bruno Spiess, Gustavo Oneda, Danilo Fonseca Leonel, Mauro F Bernardo, Ana Carolina G Macedo, Ragami Chaves Alves, Eduardo Oliveira De Souza, Tácito P Souza-Junior
This study investigated the effects of different resistance training (RT) volumes quantified by weekly sets at high intensity (load and effort) on dynamic strength adaptations and psychophysiological responses in trained individuals. Twenty-four athletes were randomly allocated to three groups that performed three (3 S, n=8), six (6 S, n=8), and nine (9 S, n=8) weekly sets, respectively, three times a week on the barbell back squat and bench press during an 8-week period. While all groups showcased strength gains (p<0...
May 10, 2024: International Journal of Sports Medicine
Khaldoon M Bashaireh, Mohammad A Yabroudi, David Logerstedt, Lynn Snyder-Mackler, Zakariya H Nawasreh
The study aimed to identify athlete-reported reasons for not returning to pre-injury sports level after anterior cruciate ligament reconstruction (ACLR) and to identify the factors associated with these reasons. Ninety-one athletes with 2 years post-ACLR indicated whether or not they had returned to their pre-injury sport level (same frequency, duration, and intensity). Athletes who did not return were asked to provide the reasons. Athletes' characteristics and injury-related factors were used to determine factors associated with the reasons for not returning...
May 8, 2024: International Journal of Sports Medicine
Gengxin Dong, Jianxin Wu, Yinglu Hong, Qian Li, Meng Liu, Guole Jiang, Dapeng Bao, Brad Manor, Junhong Zhou
Hydrogen, as an antioxidant, may have the potential to mitigate fatigue and improve selected oxidative stress markers induced by strenuous exercise. This study focused on previously unexplored approach of pre-exercise inhalation of hydrogen-rich gas (HRG). Twenty-four healthy adult men first completed prelaboratories to determine maximum cycling power (Wmax) and maximum cycling time (Tmax). Then they were subjected to ride Tmax at 80% Wmax on cycle ergometers after inhaled HRG or placebo gas (air) for 60-minute in a double-blind, counterbalanced, randomized, and crossover design...
May 2, 2024: International Journal of Sports Medicine
Raony Espíndola Moura, Rodrigo Fabio Bezerra da Silva, Lucas Morais de Souza Gomes, José Leonardo Ramos da Silva, Rafael Dos Santos Henrique, Filipe Antônio de Barros Sousa, Fabiano Fonseca
We analyzed the effects of load magnitude and bar velocity variables on sensitivity to fatigue. Seventeen resistance-trained men (age=25.7±4.9 years; height=177.0±7.2 cm; body mass=77.7±12.3 kg; back-squat 1RM=145.0±33.9 kg; 1RM/body mass=1.86) participated in the study. Pre- and post-exercise changes in the mean propulsive velocity (MPV) and peak velocity (PV) in the back-squat at different intensities were compared with variations in the countermovement jump (CMJ). CMJ height decreased significantly from pre- to post-exercise (∆%=-7...
April 29, 2024: International Journal of Sports Medicine
Witalo Kassiano, Bruna Daniella de Vasconcelos Costa, Gabriel Kunevaliki, Felipe Lisboa, Ian Tricoli, Jarlisson Francsuel, Luis Lima, Natã Stavinski, Edilson S Cyrino
We compared the effects of different calf training weekly sets on muscle size changes. Sixty-one untrained young women performed a calf training program for 6 weeks, 3 d·wk-1, with differences in the resistance training volume. The participants were randomly assigned to 1 of the 3 groups: 6-SET, 9-SET, and 12-SET calf training weekly sets. The calf raise exercise was performed in sets of 15-20 repetitions maximum. The muscle thickness measurements of medial gastrocnemius (MG), lateral gastrocnemius (LG), and soleus (SOL) were taken via B-mode ultrasound...
April 29, 2024: International Journal of Sports Medicine
Óscar López-Belmonte, Ana Gay, Jesús J Ruiz-Navarro, Francisco Cuenca-Fernández, Roberto Cejuela, Raúl Arellano
This study aimed (i) to analyze the 1500 m open water swimming performance, (ii) to examine the associations between physiological and biomechanical variables with swimming performance, and (iii) to determine which variables can predict swimming performance in triathletes. Fourteen elite triathletes (23.4±3.8 y) performed a 1500 m test in open water swimming conditions. Swimming performance was assessed using World Aquatics Points Scoring, and data were obtained from the 1500 m open water swimming test...
April 22, 2024: International Journal of Sports Medicine
Ralf Haase, Anna Katharina Dunst, Nico Nitzsche
Anaerobic performance diagnostics in athletes relies on accurate measurements of blood lactate concentration and the calculation of blood lactate accumulation resulting from glycolytic processes. In this study, we investigated the impact of pedaling frequency on blood lactate accumulation during 10-second maximal isokinetic cycling sprints. Thirteen trained males completed five 10-second maximal isokinetic cycling sprints on a bicycle ergometer at different pedaling frequencies (90 rpm, 110 rpm, 130 rpm, 150 rpm, 170 rpm) with continuous power and frequency measurement...
April 22, 2024: International Journal of Sports Medicine
Robert H Fitts, Xinrui Wang, Wai-Meng Kwok, Amadou K S Camara
Cardiovascular disease is a leading cause of morbidity and mortality, and exercise-training (TRN) is known to reduce risk factors and protect the heart from ischemia and reperfusion injury. Though the cardioprotective effects of exercise are well-documented, underlying mechanisms are not well understood. This review highlights recent findings and focuses on cardiac factors with emphasis on K+ channel control of the action potential duration (APD), β-adrenergic and adenosine regulation of cardiomyocyte function, and mitochondrial Ca2+ regulation...
April 22, 2024: International Journal of Sports Medicine
Junhyeong Lim, Jaewook Lee, Sanghyup Park, Jinwoo Lee, Jaewon Kim, Jihong Park
We compared the immediate response and recovery of femoral cartilage morphology following aerobic or resistance exercise to a control condition. Fifteen healthy young males (23.9 years; 170.1 cm; 69.7 kg) visited the laboratory three separate days and randomly performed one of the 30 min exercise aerobic exercise (treadmill running); resistance exercises (leg presses, back squats, and knee extensions); or seated rest as the control, each followed by the 50 min recovery. Ultrasonographic images of the femoral cartilage cross-sectional area (CSA) were obtained before and after exercise and every 5 min thereafter...
April 17, 2024: International Journal of Sports Medicine
Niall Simmons, Miguel Rodriguez Ruiz, Flaminia Ronca
Mixed-gender studies predominate the current literature exploring the interaction between physical activity and dementia risk. Considering that menopause appears to contribute to females' increased risk of cognitive decline when compared to males, further clarity is required on the impact of physical activity in reducing late-life dementia risk specifically in perimenopausal females. A literature search of MEDLINE, EMBASE, Web of Science, SCOPUS and CINAHL databases yielded fourteen studies for review. A significant inverse relationship between perimenopausal leisure time physical activity, or physical fitness, and future all-cause dementia risk was found in most studies exploring this interaction...
April 16, 2024: International Journal of Sports Medicine
John Long, Denver Brown, John Farrell, Matthew Gonzalez, Kelly Martell Cheever
This study assessed the multifaceted relations between measures of workload, psychological state, and recovery throughout an entire soccer season. A prospective longitudinal study was utilized to measure workload (GPS training load, RPE), psychological state (mental stress, mental fatigue, and mood), and recovery (sleep duration, sleep quality, and soreness), across ninety observations. Separate linear-mixed effect models were used to assess outcomes of RPE, soreness, and sleep duration. A linear mixed-effects model explained 59% of the variance in RPE following each session...
April 10, 2024: International Journal of Sports Medicine
Jinghui Yang, Nicholas Rolnick, Ericka Merriwether, Smita Rao
We compared the magnitude of exercise-induced hypoalgesia and conditioned pain modulation between blood-flow restriction (BFR) resistance exercise (RE) and moderate-intensity RE. Twenty-five asymptomatic participants performed unilateral leg press in two visits. For moderate-intensity RE, subjects exercised at 50% 1RM without BFR whereas BFR RE exercised at 30% 1RM with a cuff inflated to 60% limb occlusion pressure. Exercise-induced hypoalgesia was quantified by pressure pain threshold changes before and after RE...
April 8, 2024: International Journal of Sports Medicine
Jose Morales, Misaki Iteya, James Mulroy, Rafael Kons, Jozef Simenko, David H Fukuda, Raquel Escobar-Molina, Myriam Guerra-Balic, Emanuela Pierantozzi, Marta Moragas
The main aim of this study was to evaluate injury prevalence, incidence rate, and burden in judo athletes with intellectual disabilities (ID) who participate in international competitions. This retrospective cross-sectional study analyzed data from the past year for 182 judo athletes with ID. Data was collected using a self-reported questionnaire, adapted from previous research, that included questions about injuries impacting training or competition, injury type, mechanism, severity, diagnosis, and location on the body...
April 2, 2024: International Journal of Sports Medicine
Marcos Quintana-Cepedal, Bernat de Pablo Marquez, Miguel Del Valle Soto, Hugo Olmedillas
Groin problems are common in multidirectional sports. The aim of the present study is to assess seasonal, current, and trends for groin problems in rink hockey players, irrespective of their playing position, age, or gender. Rink hockey players from three countries [n=446 (162 female, 284 male)] were invited to participate in an online questionnaire. This form evaluated the prevalence of groin problems (time-loss and non-time-loss) for the 2022-2023 season, as well as monthly prevalence of groin problems (time-loss and non-time-loss)...
April 2, 2024: International Journal of Sports Medicine
Eun Sun Yoon, Young-Joo Kim
This study aimed to identify the relationship between exercise-induced hypertension and carotid artery intima-media thickness in long-distance runners. Sixty healthy male runners aged 40 to 60 years were assigned to the following three groups based on resting blood pressure and maximal systolic blood pressure during a maximal exercise test: normal blood pressure response, exercise-induced hypertension, and complex hypertension. An exaggerated systolic blood pressure response was defined as a maximal systolic blood pressure+≥+210 mmHg during the maximal exercise test, while carotid intima-media thickness was measured using B-mode ultrasonography...
March 28, 2024: International Journal of Sports Medicine
Carlos Alberto Toledo Teixeira Filho, Eduardo Pizzo Junior, Julia Waszczuk Vendrame, Gabriel Martins Da Silva, Allysie Priscilla de Souza Cavina, Leonardo Kesrouani Lemos, Franciele Marques Vanderlei
The objective of this meta-analysis is to compare the effects on muscle strength and hypertrophy of low and high-intensity aerobic training with BFR (LI-BFR and HI-BFR) versus low and high-intensity aerobic training without BFR (LI and HI). The search was performed in five databases, by two independent researchers, and the terms and keywords used to optimize the searches were related to blood flow restriction and aerobic training. All studies were evaluated for methodological quality using the PEDro scale and for quality of evidence using the GRADE system...
March 28, 2024: International Journal of Sports Medicine
Braidy S Solie, Luke V Tollefson, Christopher P Doney, Jeremy M J O'Keefe, Will C Thompson, Robert F LaPrade
Returning to sport after anterior cruciate ligament reconstruction (ACLR) can be a challenging and complex process for the athlete, with the rate of return to the pre-injury level of sport observed to be less than athlete expectations. Of the athletes that do return to sport (RTS), knee re-injury rates remain high, and multiple studies have observed impaired athletic performance upon RTS after ACLR as well as reduced playing time, productivity, and career lengths. To mitigate re-injury and improve RTS outcomes, multiple RTS after ACLR consensus statements/clinical practice guidelines have recommended objective RTS testing criteria to be met prior to medical clearance for unrestricted sports participation...
March 25, 2024: International Journal of Sports Medicine
Jose Asian-Clemente, Alberto Rabano-Munoz, Bernardo Requena, Luis Suarez-Arrones
The aims of this study were to determine the effect of different compositions in transition games (TGs) on the load of soccer players and to evaluate their performance in physical tests. Using a GPS system, 18 players were monitored during: 3vs2, 2vs1 and 1vs1. Distance covered (DC), DC 18-20.9 km·h-1 , 21-23.9 km·h-1 , >24 km·h-1 , peak speed, accelerations (Acc) and decelerations (Dec) >1.0 m·s-2 and >2.5 m·s-2 and rate of perceived exertion (RPE) were recorded. Before and after each TG, countermovement-jump (CMJ), 15- (S15 ) and 30 m (S30 ) speed tests were assessed...
March 12, 2024: International Journal of Sports Medicine
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