Journal of Sports Medicine and Physical Fitness最新文献

{"title":"Exploring factors associated with vitamin D nutritional status in Japanese baseball players.","authors":"Mami Toraishi, Jun Sasahara, Wataru Miyamoto, Takumi Nakagawa","doi":"10.23736/S0022-4707.24.16147-6","DOIUrl":"10.23736/S0022-4707.24.16147-6","url":null,"abstract":"<p><strong>Background: </strong>Vitamin D is a nutrient necessary for conditioning athletes. This cross-sectional study aimed to determine the nutritional status of vitamin D in farm-league professional baseball players to examine vitamin D requirements.</p><p><strong>Methods: </strong>This study included 35 players enrolled in farm team A of the Nippon Professional Baseball Organization in the spring of 2022. The survey items included anthropometric measurements, serum 25-hydroxyvitamin D [25(OH)D] levels as an indicator of vitamin D nutritional status, a simple questionnaire for predicting vitamin D deficiency in Japanese adults, mean daily sun exposure duration, and body surface area (BSA).</p><p><strong>Results: </strong>The serum 25(OH)D level was 29.8±1.8 ng/mL, and 17 (49%) participants were vitamin D deficient (<30 ng/mL). The serum 25(OH)D levels showed positive correlations with body height (r=0.459, P<0.01), fat-free mass (r=0.347, P<0.05), muscle mass (r=0.341, P<0.05), and BSA (r=0.434, P<0.01). Furthermore, the consumption frequency of fish with high vitamin D levels in regular diets, BSA, and body fat mass were identified as predictors of the serum nutritional status of vitamin D.</p><p><strong>Conclusions: </strong>Athletes engaged in outdoor sports, such as the study participants, had inadequate vitamin D levels. In addition, the frequency of consumption of fish with high vitamin D levels in regular diets, BSA, and body fat mass were identified as predictors of the serum nutritional status of vitamin D. Further studies of the relationship between vitamin D supplementation and performance are needed.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"394-399"},"PeriodicalIF":1.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142682117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The impact of altitude conditions on performance in men's and women's professional padel.","authors":"Adrián Escudero-Tena, Iván Martín-Miguel, Bernardino J Sánchez-Alcaraz, Corrado Lupo, Rafael Conde-Ripoll, Diego Muñoz","doi":"10.23736/S0022-4707.24.16361-X","DOIUrl":"10.23736/S0022-4707.24.16361-X","url":null,"abstract":"<p><strong>Background: </strong>The aim of this study was to analyze whether there are differences in performance indicators between matches played at different altitudes in professional padel.</p><p><strong>Methods: </strong>Data were collected and analyzed based on players' sex, set number, and set score using video footage from the World Padel Tour (WPT), including open-access TV broadcasts and WPT's YouTube channel. Performance indicators - such as break points won, errors, winners, and winning smashes - were recorded across 1122 sets (485 matches) from three WPT seasons (2020-2022).</p><p><strong>Results: </strong>In men's padel, altitude-related differences were observed in break points (P=0.005), break points won (P=0.002), and winners (P=0.002). In women's padel, altitude-related differences were found in break points won (P=0.004), smashes (P<0.001), and winning smashes (P<0.001). Set number and set result were associated with variations in several performance indicators, depending on the tournament's altitude (below or above 500 meters).</p><p><strong>Conclusions: </strong>These results represent reference data to help players and coaches train according to altitude conditions.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"328-334"},"PeriodicalIF":1.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142770076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The impact of concurrent training in team sports and soccer.","authors":"Ofir Malamud, Isaac I R Smukas","doi":"10.23736/S0022-4707.24.16357-8","DOIUrl":"10.23736/S0022-4707.24.16357-8","url":null,"abstract":"<p><p>Team sports players are frequently required to integrate multiple physical components, including strength and endurance capacity, to maximize their performance during both training and competitions. The combination of strength and endurance within a periodized program is known as concurrent training. Recently, concurrent training has emerged as an innovative method to enhance both muscular strength and aerobic performance, tailored to the specific requirements and diverse nature of each sport. However, concurrent training may induce excessive fatigue and compromise performance potentiation, depending on training prescription parameters. This distinction between the interference effect and performance enhancement presents a complex challenge for any team sports system. Consequently, the objective of this review was to scrutinize the efficacy, practical application, and methodological aspects of concurrent training. Additionally, it aims to elucidate strategies to mitigate the complexities associated with the interference effect, thereby optimizing the benefits of concurrent training modality for team sports, emphasizing soccer. The major findings indicate that concurrent training can improve strength and endurance qualities in athletes, but under certain conditions, it can also interfere with adaptations. Appropriate programming strategies, such as proper sequencing, scheduling, volume, intensity, and recovery, can help mitigate these negative effects. Additionally, whereas more experienced athletes display greater proficiency in executing concurrent training programs, younger players, particularly those under 14, tend to experience minimal interference effects from this training approach, making it well-suited for their development. Overall, concurrent training has been demonstrated as an effective and efficient method for improving strength and endurance performance in team sports players.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"369-382"},"PeriodicalIF":1.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142801416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cut-off values for estimated cardiorespiratory fitness in terms of physical functioning among middle-aged to older adults.","authors":"Olli-Pekka Nuuttila, Pauliina Husu, Kari Tokola, Henri Vähä-Ypyä, Harri Sievänen, Tommi Vasankari","doi":"10.23736/S0022-4707.24.16384-0","DOIUrl":"10.23736/S0022-4707.24.16384-0","url":null,"abstract":"<p><strong>Background: </strong>Cardiorespiratory fitness is linked to various health outcomes. This study aimed to establish cut-off values for estimated cardiorespiratory fitness associated with poor physical functioning in middle-aged to older adults.</p><p><strong>Methods: </strong>A total of 2638 participants (1083 males), aged 40-69 years, performed a 6-min walking test (6MWT) to estimate cardiorespiratory fitness (VO<inf>2max)</inf> and completed a health-related questionnaire. Physical functioning was assessed using four outcomes: perceived health, perceived fitness, difficulties in 2-km walking, and difficulties in climbing several stairs. Receiver operator characteristics (ROC) curves were used to determine cut-off values for estimated VO<inf>2max</inf> and 6MWT distance linked to poor physical functioning based on the four outcomes. Analyses were done separately for males and females, and for 40- to 49-, 50- to 59-, and 60- to 69-year-old groups. Multinomial regression was used to analyze differences between fitness thirds in outcome variables.</p><p><strong>Results: </strong>ROC analyses were significant for all outcomes (AUC 0.686-0.834, P<0.001). In the total group, cut-off values for estimated VO<inf>2max</inf> were 29.9-30.2 mL/kg/min, and for walking distance, 588.0-599.5 m. Cut-off values decreased with age, and mean differences between males and females were 3.3 mL/kg/min and 33 m. All cut-off values were within ±1.3 mL/kg/min of the lower fitness tertile. The odds ratios of having poor physical functioning in the middle and high fitness thirds were less than 0.50 compared to low fitness third.</p><p><strong>Conclusions: </strong>VO<inf>2max</inf> of 30 mL/kg/min and 600-m walking distance seemed reasonable cut-off values for poor physical functioning. Exceeding the currently proposed thresholds is a desirable goal to avoid consequences of insufficient fitness.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"361-368"},"PeriodicalIF":1.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142502670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An intermittent recovery test for soccer players: a validation study.","authors":"Andrea Meloni, Roberto Codella, Tommaso Arrighi, Luca Festa, Giacomo Ceci, Giacomo Faraci, Gaia Manari, Danilo Manari, Luca Filipas","doi":"10.23736/S0022-4707.24.16105-1","DOIUrl":"10.23736/S0022-4707.24.16105-1","url":null,"abstract":"<p><strong>Background: </strong>Soccer is an intermittent team sport that demands high aerobic capacity. On field, soccer players' aerobic capacity, assessed through the maximal oxygen uptake (VO<inf>2</inf>max), is usually determined by an intermittent recovery test. The aim of this study was to obtain a construct validity of a new intermittent recovery test (IRT) with a fixed speed and a progressive decrement of rest period.</p><p><strong>Methods: </strong>Twenty-five male soccer players were recruited to perform an incremental continuous test (ICT) and the new IRT, to compare their physiological data. Fifteen male soccer players were involved to perform a test-retest of IRT to assess its reliability.</p><p><strong>Results: </strong>VE<inf>peak</inf>, absolute VO<inf>2</inf>max, relative VO<inf>2</inf>max and VCO<inf>2</inf>peak registered during ICT and IRT correlated strongly (Pearson's correlation coefficient ranges from 0.75 to 0.80, with very large as magnitude of effects and with P<0.001). IRT showed reliability from good to excellent regarding VE<inf>peak</inf>, absolute VO<inf>2</inf>max, relative VO<inf>2</inf>max, VCO<inf>2</inf>peak and covered distance (ICC values ranged from 0.82 to 0.95).</p><p><strong>Conclusions: </strong>These findings and its underlying physiological and muscular demands, suggest that IRT can be considered as a valid and reliable test to assess aerobic capacity in soccer players during the competitive period.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"341-346"},"PeriodicalIF":1.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142120118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Differences in throwing kinematics due to changes in run-up speed in javelin throwing.","authors":"Mizuki Makino, Koichi Nakayama, Yuka Ando, Kenji Tauchi","doi":"10.23736/S0022-4707.24.16332-3","DOIUrl":"10.23736/S0022-4707.24.16332-3","url":null,"abstract":"<p><strong>Background: </strong>In javelin throw training, although short run-up throwing is more frequently performed than full run-up throwing (throwing like a competition), it is unclear whether the throwing motion of the short run-up throwing is different from full run-up throwing. Therefore, the purpose of this study was to clarify the differences between the short and full run-up throwing in javelin throw.</p><p><strong>Methods: </strong>Twelve male javelin throwers were included in this study. The participants performed one-cross throwing (Cross), which involved throwing from a short run-up, and full run-up throwing (Run), which was similar to a competition. The coordinates of the reflective markers attached to the participant's body and javelin was recorded using an optical motion capture system. The analysis phase was from the time of last foot contact to the time of release. We calculated the kinematic variables related to javelin throwing performance and compared the Cross and Run.</p><p><strong>Results: </strong>The results showed significant differences in the joint angles of the left knee, trunk, and right shoulder between Cross and Run.</p><p><strong>Conclusions: </strong>The results indicate that different throwing motions occur in short run-up throwing compared to full run-up throwing.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"320-327"},"PeriodicalIF":1.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142365645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing the knowledge and attitudes of semi-professional netball players in the Western Cape district regarding netball injuries: a cross-sectional study.","authors":"Jaron Ras, Roné Carstens, Shevonne Hoffman, Nashitah Africa, Lloyd Leach","doi":"10.23736/S0022-4707.24.16142-7","DOIUrl":"10.23736/S0022-4707.24.16142-7","url":null,"abstract":"<p><strong>Background: </strong>Netball, with its dynamic movements, poses a high injury risk, notably to the ankles and knees. This study examined the injury knowledge and attitudes of semi-professional netball players in the Western Cape, South Africa.</p><p><strong>Methods: </strong>In this study 117 semi-professional female netball players from eight clubs in the Western Cape district were conveniently sampled. A self-administered researcher-generated questionnaire collected data on the players' sociodemographic characteristics, as well as their knowledge and attitudes regarding netball injuries. Independent samples t-test, Pearson's correlation coefficient, and the χ² tests were employed for data analyses.</p><p><strong>Results: </strong>Results showed that most players (62.4%) had good knowledge of injury prevention and recovery, though a minority held negative attitudes (39.0% and 29.0%, respectively). Those with over three years of experience demonstrated superior knowledge (85.7%) and more positive attitudes (61.9% and 71.4%). Conversely, a minority (37.6%) exhibited poor knowledge, while a majority (61.00%) displayed positive attitudes. Furthermore, a moderate positive correlation (r=0.552; P<0.001) was observed between overall knowledge and attitudes towards injury prevention and recovery.</p><p><strong>Conclusions: </strong>While most semi-professional netball players possess adequate injury knowledge, those with longer experience show more positive attitudes. Establishing educational programs emphasizing injury prevention and recovery could benefit players, especially those starting later in life, promoting both knowledge and positive attitudes towards injury management.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"400-411"},"PeriodicalIF":1.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142682178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of horizontally versus vertically loaded resistance exercises on performance and muscle architecture.","authors":"Sandro Bartolomei, Giuseppe Rosaci, Davide Latini, Federico Nigro","doi":"10.23736/S0022-4707.24.16218-4","DOIUrl":"10.23736/S0022-4707.24.16218-4","url":null,"abstract":"<p><strong>Background: </strong>The aim of this study was to compare a training program based on horizontally (HT) versus vertically (VT) loaded exercises on performance and muscle architecture of the lower body muscles.</p><p><strong>Methods: </strong>Nineteen resistance trained individuals were randomly assigned to HT (N.=10; age: 25.9±4.2 y; body mass: 72.7±11.4 kg; height: 174.0±6.0 cm) or VT group (N.=9; age: 26.9±4.4 y; body mass: 76.2±10.8 kg; height: 174.2.0±5.8 cm). Both 6-week training programs included 4 training sessions per week and were equated for the total number of repetitions. One repetition maximum (1RM) was assessed for squat and hip thrust, together with vertical and horizontal jumps and sprint. Muscle thickness (MT) and echo intensity (EI) of vastus lateralis, vastus medialis and gluteus were also evaluated pre- and post-training period.</p><p><strong>Results: </strong>A significantly greater increase in 1RM hip thrust was detected in HT (+17.9%; P=0.004) while greater increases in 1RM squat were found in VT (+10.5%; P=0.007). A greater increase (P=0.009) in vastus medialis MT was detected in VT (4.1%) compared to HT (-7.9%). Similar increases in MT of gluteus were registered in both groups (P<0.05). A greater improvement in standing long jump (P=0.004) was detected in HT (+7.6%) compared to VT (+1.6%), while both groups significantly improved vertical jump performance. Combining both groups, strong correlations were detected between gluteus EI and 20-m sprint (r=0.79; P<0.001).</p><p><strong>Conclusions: </strong>Results indicate that HT was more effective than VT for horizontal jumps while both HT and VT were equally effective on vertical jumps. Both HT and VT promoted similar changes in muscle architecture of the gluteus, but not of the vastus medialis.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"312-319"},"PeriodicalIF":1.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142622777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Monkeypox-induced myocarditis in athletes: a call for further research and raising awareness.","authors":"Adda Oudjedi","doi":"10.23736/S0022-4707.24.16699-6","DOIUrl":"10.23736/S0022-4707.24.16699-6","url":null,"abstract":"","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"464"},"PeriodicalIF":1.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142801350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Incidence of injury among male Varsity Cup Young Guns rugby players in South Africa.","authors":"Renaldo Solomons, Raven Schippers, Lloyd Leach","doi":"10.23736/S0022-4707.24.15863-X","DOIUrl":"10.23736/S0022-4707.24.15863-X","url":null,"abstract":"<p><strong>Background: </strong>The physical nature of the sport of rugby results in a high incidence of injury, even in university rugby, compared to other contact sport codes. Rugby Union lacks injury data focusing on university student-athletes, specifically in South Africa. The aim of the study was to determine the incidence of injury among male rugby players participating in the Varsity Cup Young Guns national rugby tournament.</p><p><strong>Methods: </strong>The study used a quantitative, cross-sectional, and correlational research design. A total of 252 rugby players, males aged 18 to 20 years, who played for their university rugby team in the 2022 Varsity Cup Young Guns national tournament were conveniently recruited to determine the incidence of overall, match, and training injuries (number of injuries/1000 hours) for the 2022 tournament.</p><p><strong>Results: </strong>The overall injury incidence for all players was 9.5 injuries/1000 player-hours. The injury incidence for all players during matches was 136.5 injuries/1000 match-hours, whereas during training it was 0.6 injuries/1000 training-hours. The injury incidence was greater for backs than forwards (150.6 injuries/1000 match-hours vs. 124.1 injuries/1000 match-hours, respectively). The lower limb was the most commonly injured anatomical site with 36.6% (95% CI: 27.7-48.3%), while the common types of injuries were the joints (41.6%, 95% CI: 29.9-49.9%) and muscles (28.7%, 95% CI: 20.8-38.0%). A statistically significant association was found between the playing position and the phase of play in which injury occurred (χ²<inf>(1)</inf>=160.2; P=0.021).</p><p><strong>Conclusions: </strong>This study reported a high injury incidence, especially during matches, in the Varsity Cup Young Guns tournament. It is recommended that prospective, incidence-based studies be used to precisely determine the incidence, nature, severity and mechanisms of injury. An injury surveillance system should be implemented, specifically within Varsity Cup rugby to inform, support, and improve current injury prevention strategies.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":" ","pages":"412-419"},"PeriodicalIF":1.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142622793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}