Research quarterly for exercise and sport最新文献

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The Effect of Left Temporal EEG Neurofeedback Training on Cerebral Cortical Activity and Precision Cognitive-Motor Performance. 左颞叶脑电图神经反馈训练对大脑皮层活动和精确认知运动表现的影响。
Research quarterly for exercise and sport Pub Date : 2024-12-18 DOI: 10.1080/02701367.2024.2441149
Li-Chuan Lo, Bradley D Hatfield, Kiersten Janjigian, Yung-Shun Wang, Dong-Yang Fong, Tsung-Min Hung
{"title":"The Effect of Left Temporal EEG Neurofeedback Training on Cerebral Cortical Activity and Precision Cognitive-Motor Performance.","authors":"Li-Chuan Lo, Bradley D Hatfield, Kiersten Janjigian, Yung-Shun Wang, Dong-Yang Fong, Tsung-Min Hung","doi":"10.1080/02701367.2024.2441149","DOIUrl":"https://doi.org/10.1080/02701367.2024.2441149","url":null,"abstract":"<p><p><b>Objectives:</b> The present study employed individualized magnitudes of electroencephalographic (EEG) alpha (8-12 hz) power in the left temporal (T3) region as a neurofeedback target parameter during the aiming period in pre-elite air pistol shooters to determine its effectiveness on cerebral cortical activation and performance accuracy compared to physical skill training, only. <b>Method:</b> Shooting scores and EEG activity in the left and right temporal regions were collected from 20 healthy air pistol shooters (10 assigned to neurofeedback training) before and after a 16-session intervention completed within 6 weeks. Specifically, EEG low-alpha (8-10 hz), high-alpha (10-13 hz) power, and coherence obtained at the T3-Fz and T4-Fz recording sites over three consecutive 1-s intervals prior to trigger pull, were subjected to three separate 2 × 2 × 2 × 3 (Group x Hemisphere x Time x Epoch) ANOVAs. <b>Results:</b> The neurofeedback group exhibited elevated low- and high-alpha EEG power across both temporal regions, but no differences in EEG broad-band alpha coherence, accompanied by enhanced performance after the intervention compared to the control group. <b>Conclusions:</b> The findings support the influence of neurofeedback training on cerebral cortical arousal and performance of a precision-aiming task, however, the influence of the neurofeedback on brain dynamics (i.e. alpha power) extended beyond the targeted region as a nonspecific manifestation of cerebral cortical inhibition leading to neural efficiency at the homologous sites.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"1-11"},"PeriodicalIF":0.0,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142848739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Adaptations to Change of Direction Ability After Eight Weeks of Strength or Plyometric Training in Elite Youth Football Players. 青少年精英足球运动员经过八周力量或负重训练后对变向能力的适应性。
Research quarterly for exercise and sport Pub Date : 2024-12-17 DOI: 10.1080/02701367.2024.2433454
Mads Lerche, Anders Borup, Samuel J Callaghan, Matthew Buckthorpe
{"title":"Adaptations to Change of Direction Ability After Eight Weeks of Strength or Plyometric Training in Elite Youth Football Players.","authors":"Mads Lerche, Anders Borup, Samuel J Callaghan, Matthew Buckthorpe","doi":"10.1080/02701367.2024.2433454","DOIUrl":"https://doi.org/10.1080/02701367.2024.2433454","url":null,"abstract":"<p><p>This study aimed to investigate the effects of plyometric (PT) or strength (ST) training on change of direction (COD) performance at two differing angles among highly trained youth footballers. Seventy-one national-level youth football players (14.6 ± 1.8 years) were randomly allocated to either an 8-week, twice weekly, plyometric (PT) or strength training (ST) group. Pre- and post-intervention testing consisted of measures of COD performance at 45 and 180º, as well as maximal strength assessed via Trap Bar Deadlift 5RM (TBD5RM) and reactive strength index (RSI) from a 40 cm drop jump, respectively. Changes from pre- to post-testing were assessed via mixed ANOVAs (<i>p</i> ≤ .05) and effect sizes. Both training groups improved TBD5RM (PT = 7.8%, <i>p</i> < .001, ES = 0.32. ST = 6.9%, <i>p</i> < .001, ES = 0.28) and RSI (PT = 15.9%, <i>p</i> < .001, ES = 0.59. ST = 15.6%, <i>p</i> < .001, ES = 0.64) measures. Significant improvement in 45° COD performance was found for both training groups (PT = 4.0%, <i>p</i> < .001, ES = -0.68. ST = 3.6%, <i>p</i> < .001, ES = -0.61), whilst neither group improved at 180° (PT = 0.8%, <i>p</i> = .192, ES = -0.17. ST = 0.8%, <i>p</i> = .282, ES = -0.23). No significant differences in changes were found between training groups. Both PT and ST were effective at enhancing maximal and explosive strength as well as COD performance measured at shallow angles. Neither method enhanced the sharp angle COD performance.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142848736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Physical Activity and Weight Gain During Pregnancy: Is This Association Modified by Sleep? 孕期体育锻炼与体重增加:睡眠是否会改变这种关系?
Research quarterly for exercise and sport Pub Date : 2024-12-17 DOI: 10.1080/02701367.2024.2424210
Thaynã Ramos Flores, Otávio Amaral de Andrade Leão, Andrea Wendt, Inácio Crochemore-Silva, Gregore Iven Mielke, Marlos Rodrigues Domingues, Pedro C Hallal, Mariângela Freitas da Silveira
{"title":"Physical Activity and Weight Gain During Pregnancy: Is This Association Modified by Sleep?","authors":"Thaynã Ramos Flores, Otávio Amaral de Andrade Leão, Andrea Wendt, Inácio Crochemore-Silva, Gregore Iven Mielke, Marlos Rodrigues Domingues, Pedro C Hallal, Mariângela Freitas da Silveira","doi":"10.1080/02701367.2024.2424210","DOIUrl":"https://doi.org/10.1080/02701367.2024.2424210","url":null,"abstract":"<p><p><b>Objective</b> To evaluate the cross-sectional association of physical activity during pregnancy with gestational weight gain and verify if associations are modified by levels of sleep duration and efficiency. <b>Methods:</b> Mothers who were participants of the 2015 Pelotas (Brazil) Birth Cohort study were analyzed. Physical activity (PA) and sleep were measured using the nondominant wrist accelerometer model wGT3X-BT (ActiGraph, Pensacola, FL). Moderate-to-vigorous activities were measured in bouts of 5 minutes (MVPA 5-min bout). Activities were characterized as sustained and overall physical activity was expressed in mg, and MVPA (non-bouted) activities were characterized as not sustained. Sleep was presented as minute bouts, sleep time window, total sleep time, and sleep efficiency. Gestational weight gain (GWG) was calculated by a woman's weight at the end of gestation minus the pre-pregnancy weight. Linear regression models were used to evaluate the association between PA and GWG. Stratification by sleep characteristics in tertiles was performed. <b>Results:</b> The analytical sample included 1,938 women with information for PA, sleep, and GWG. The mean GWG was 12,030 g (SD = 6658.8). After adjustments, for every 15 minutes of sustained physical activity (MVPA 5-min bout), the GWG decreased by 591.3 g [β= -591.3 (95%CI: -1,147.1; -35.5). A statistically significant association was observed between 15 minutes of sustained physical activity (MVPA 5-min bout) and GWG in the second and third tertiles of healthier sleep efficiency. <b>Conclusion:</b> MVPA with 5-min bouts is associated with lower GWG. The GWG reduction was greater in the higher sleep efficiency strata.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142848738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparison between Warm-Up Protocols in Post-Activation Potentiation Enhancement (PAPE) of Sprint and Vertical Jump Performance in a Female Futsal Team. 比较不同热身方案对女子五人制足球队短跑和立定跳远成绩的激活后潜能增强(PAPE)作用。
Research quarterly for exercise and sport Pub Date : 2024-12-17 DOI: 10.1080/02701367.2024.2434142
Gabriela Chaves Lucas, Soraya Anita Mendes Sá, Bruno Nobre Pinheiro, Ismael Godinho, Filipe Casanova, Victor Machado Reis, Nuno Garrido, José Vilaça-Alves
{"title":"Comparison between Warm-Up Protocols in Post-Activation Potentiation Enhancement (PAPE) of Sprint and Vertical Jump Performance in a Female Futsal Team.","authors":"Gabriela Chaves Lucas, Soraya Anita Mendes Sá, Bruno Nobre Pinheiro, Ismael Godinho, Filipe Casanova, Victor Machado Reis, Nuno Garrido, José Vilaça-Alves","doi":"10.1080/02701367.2024.2434142","DOIUrl":"https://doi.org/10.1080/02701367.2024.2434142","url":null,"abstract":"<p><p>The aim of this study was to examine the influence of three warm-up protocols, with and without post-activation performance enhancement (PAPE), on sprint and vertical jump performance in female athletes. Twenty-five university futsal athletes were randomly assigned to three protocols: i) Traditional Warm-Up (TWU), involving cardiovascular, coordination exercises, and dynamic stretching; ii) Drop Jump Warm-Up (DJWU), consisting of drop jumps from heights of 30 and 40 cm; and iii) Maximum Isometric Warm-Up (MIWU), with high-intensity isometric contractions held for 10 seconds in a squat position at approximately 130-135 degrees of knee flexion. Tests included the countermovement vertical jump (CMVJ) and a 20-meter sprint (S20). The CMVJ showed a significant increase across all three groups (F(1,72) = 125.312; <i>p</i> < .0001; ηp<sup>2</sup> = 0.635), while S20 displayed a significant time reduction only for MIWU (<i>p</i> = .002). Although no significant differences were found between groups, individual analysis revealed significant CMVJ differences for TWU, DJWU, and MIWU (<i>p</i> < .0001). We conclude that PAPE effectiveness varies according to protocol and individual athlete characteristics; however, maximum isometric exercises appear to have a more pronounced effect on PAPE production in sprint performance.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142848737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
School-Age Talent Identification in Female Handball by a Mathematical Model: Equation Proposed from Anthropometry, Maturity Offset, Fitness and Technical Field-Tests. 通过数学模型识别女子手球的学龄人才:根据人体测量、成熟度偏移、体能和技术现场测试提出的方程。
Research quarterly for exercise and sport Pub Date : 2024-12-01 Epub Date: 2024-06-28 DOI: 10.1080/02701367.2024.2358962
Guilherme Caporal, Adroaldo C A Gaya, Augusto Pedretti, Júlio B Mello
{"title":"School-Age Talent Identification in Female Handball by a Mathematical Model: Equation Proposed from Anthropometry, Maturity Offset, Fitness and Technical Field-Tests.","authors":"Guilherme Caporal, Adroaldo C A Gaya, Augusto Pedretti, Júlio B Mello","doi":"10.1080/02701367.2024.2358962","DOIUrl":"10.1080/02701367.2024.2358962","url":null,"abstract":"<p><p>The present study aimed to identify parameters that best discriminate between high-level and scholar-level players for the Brazilian 13-14-year-old girl's handball and propose a mathematical model to identify sports talent for handball. The sample was made up of all available handball players comprising these two groups: 100 girls who participated in the high-level handball championship in Brazil and 53 girls (age 13-14 years) as finalists of the school-level games in one region of Brazil. We assess the anthropometric profile, maturity offset, physical fitness, and technical skills for handball. To propose the equation, the Discriminant Function Analysis method was used. The discriminant function was significant (<i>p</i> ≤ .05), had a good canonical correlation (0.590), and still had an average Wilk Lambda (0.652). The variables considered in the talent identification model included: 1. flexibility, 2. abdominal strength, 3. lower limbs muscle power, 4. agility, 5. defensive movement and 6. slalom with ball. The values from the equation for identifying school-age athletes with high motor skills and performance for handball can be classified by a cutoff point (Y = 0.192). The results showed that the mathematical-model obtained was able to select school-age athletes with high motor skills for handball, and with the profile for participation in high-level championships.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"1002-1010"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141474176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Goldfit Soccer: A Multidimensional Model for Talent Identification of Young Soccer Players. Goldfit Soccer:用于识别年轻足球运动员天赋的多维模型。
Research quarterly for exercise and sport Pub Date : 2024-12-01 Epub Date: 2024-06-17 DOI: 10.1080/02701367.2024.2347983
Francisco Zacaron Werneck, Emerson Filipino Coelho, Marcelo de Oliveira Matta, Rodrigo César Pedrosa Silva, António José Barata Figueiredo
{"title":"Goldfit Soccer: A Multidimensional Model for Talent Identification of Young Soccer Players.","authors":"Francisco Zacaron Werneck, Emerson Filipino Coelho, Marcelo de Oliveira Matta, Rodrigo César Pedrosa Silva, António José Barata Figueiredo","doi":"10.1080/02701367.2024.2347983","DOIUrl":"10.1080/02701367.2024.2347983","url":null,"abstract":"<p><p>Studies have provided empirical evidence on the prognostic relevance of test batteries and the \"coach's eye\" for talent identification. The aims were 1) to compare objective and subjective assessments as well as a combined soccer-specific potential index between future selected and non-selected players and 2) to evaluate the prognostic validity of a multidimensional model as a tool for talent identification in soccer. The sample was composed by 132 male players (14,5 ± 1,4 years; regional competitive level) from U13 to U17 age groups of a Brazilian soccer talent development program. Athletes completed a multidimensional test battery and were subjectively rated by their coaches for sporting potential. Players' success was evaluated five years later and was operationalized by achieving under-20 category of the Brazilian Championship or adult professional level (success rate, 15.9%). Confirming univariate prognostic validity, future selected outperformed non-selected players regarding 20-m sprint (<i>p</i> = .009), agility (<i>p</i> = .04), countermovement jump (<i>p</i> = .04), sit-and-reach (<i>p</i> = .001), Yo-Yo IR1 (<i>p</i> = .001), dribbling (<i>p</i> < .001), perceived competence (<i>p</i> = .007), peaking under pressure (<i>p</i> = .01), confidence/motivation (<i>p</i> = .03), coping skills (<i>p</i> = .03), intangibles (<i>p</i> < .001) and player potential (<i>p</i> < .001). A combined index (objective tests, athlete's assessments and coach's eye) named Gold Score Soccer (GSS) showed high prognostic validity (<i>p</i> < .001). A binary logistic regression estimated the probability of success (yes/not) with GSS, ambidextrous and predicted age at peak height velocity as predictors. This multidimensional model named GoldFit Soccer showed high prognostic validity (sensitivity = 85.7%; specificity = 83.8%; accuracy = 84.1%; area under the ROC curve = .93 [.87-.98]). Thus, GoldFit Soccer is a valid multidimensional scientific model for talent identification in soccer.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"895-909"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141422370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of Time Point of Pre-Competitions Peaking on Performance in Major-Competitions. 赛前达到顶峰的时间点对重大比赛成绩的影响。
Research quarterly for exercise and sport Pub Date : 2024-12-01 Epub Date: 2024-07-01 DOI: 10.1080/02701367.2024.2357648
Wei Xin, Zhong Yaping, Wang Tiantian
{"title":"Effects of Time Point of Pre-Competitions Peaking on Performance in Major-Competitions.","authors":"Wei Xin, Zhong Yaping, Wang Tiantian","doi":"10.1080/02701367.2024.2357648","DOIUrl":"10.1080/02701367.2024.2357648","url":null,"abstract":"<p><p><b>Objectives:</b> To study the effects of the time points of pre-competition peaking (TPCP, the time point when an athlete's peaking shows up before a major-competition) on the athletes' performances in the major-competition (M-Performance). <b>Design:</b> Mixed design. <b>Methods:</b> We used cluster analysis to classify 892 elite track and field athletes who participated in the 2017 and 2019 IAAF World Championships in Athletics, based on their TPCP and other related factors. Furthermore, we used a fixed-effects model and a mixed-effects model to analyze the relationship between the TPCP and M-Performance. <b>Results:</b> The TPCP of elite track and field athletes were divided into four categories: late, slightly late, slightly early, and early. In speed/power events, athletes in the slightly late category had better M-Performance. In endurance events, athletes in the slightly early category had better M-Performance. In speed/power events, delaying the TPCP did not improve the athletes' M-Performance. In endurance events, advancing the TPCP effectively improved the athletes' M-Performance. <b>Conclusions:</b> To improve M-Performance, athletes in speed/power events should be peaking 2-8 weeks before a major-competition, and athletes in endurance events should be peaking 8-14 weeks before a major-competition. Future research should aim to identify individual factors affecting TPCP, such as the time for the body's adaptation to training and the residual training effect.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"974-982"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141478289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Feasibility and Effects of a Neuromuscular Warm-Up Based on the Physical Literacy Model for 8-12-Year-Old-Children. 基于 8-12 岁儿童体育素养模型的神经肌肉热身的可行性和效果。
Research quarterly for exercise and sport Pub Date : 2024-12-01 Epub Date: 2024-06-06 DOI: 10.1080/02701367.2024.2343361
John A Jimenez-Garcia, Alejandro Gómez-Rodas, Richard DeMont
{"title":"Feasibility and Effects of a Neuromuscular Warm-Up Based on the Physical Literacy Model for 8-12-Year-Old-Children.","authors":"John A Jimenez-Garcia, Alejandro Gómez-Rodas, Richard DeMont","doi":"10.1080/02701367.2024.2343361","DOIUrl":"10.1080/02701367.2024.2343361","url":null,"abstract":"<p><p><b>Background:</b> Physical literacy and injury prevention strategies use similar movement-related constructs and can be connected to develop comprehensive interventions. We aimed to test the feasibility and effects of a neuromuscular warm-up based on physical literacy and injury prevention strategies for 8-12-year-old children. <b>Methods:</b> We conducted a cluster non-randomized controlled trial. We defined a priori feasibility criteria and studied the effects of the intervention on physical literacy constructs, movement competence, and neuromuscular performance. We used generalized linear mixed models controlling for covariates and clustering with a significance level of 0.001. <b>Results:</b> We recruited 18 groups (<i>n</i> = 363) and randomly allocated nine to intervention (<i>n</i> = 179; female = 63.7%, age = 9.8 ± 1 years) and nine to control (<i>n</i> = 184, female = 53.3%, age = 9.9 ± 0.9 years). We met four of seven feasibility criteria (i.e. recruitment, adherence, enjoyment, perceived exertion). The three feasibility criteria that were not met (i.e. compliance, fidelity, follow-up) were slightly below the predefined threshold (90%). Model-adjusted mean differences for physical literacy constructs, movement competence, vertical jump height, horizontal jump distance, 20-m sprint time, and dynamic balance favored the intervention (<i>p</i> < .001). <b>Conclusion:</b> The feasibility evidence indicates that the intervention should be slightly modified before implementing it in a larger study. The observed mean differences are promising and can be used in planning future interventions.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"863-872"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141263685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Assessing the Validity of Two Non-Exercise Regression Equations for Predicting Maximal Oxygen Consumption. 评估用于预测最大耗氧量的两个非运动回归方程的有效性。
Research quarterly for exercise and sport Pub Date : 2024-12-01 Epub Date: 2024-07-02 DOI: 10.1080/02701367.2024.2354819
Mahmoud Nikseresht, Carlo Castagna, Mehdi Nikseresht
{"title":"Assessing the Validity of Two Non-Exercise Regression Equations for Predicting Maximal Oxygen Consumption.","authors":"Mahmoud Nikseresht, Carlo Castagna, Mehdi Nikseresht","doi":"10.1080/02701367.2024.2354819","DOIUrl":"10.1080/02701367.2024.2354819","url":null,"abstract":"<p><p><b>Purpose:</b> This study aimed to develop two regression equations to predict maximal oxygen consumption (VO<sub>2max</sub>) using non-exercise data from a substantial cohort of healthy Iranian adult males. Additionally, this study sought to examine the predictive accuracy of these equations across four different levels of physical activity. <b>Methods:</b> A total of 126 participants (age: 34.9 ± 11.3 years, body mass index [BMI]: 24.9 ± 2.7 kg/m², and body fat percentage [BF%]: 18.3 ± 4.9) completed a maximal graded exercise test to measure VO<sub>2max</sub>, with a mean of 45.0 ± 3.4 ml.kg<sup>-1</sup>.min<sup>-1</sup>. Participants also provided information on age, current physical activity rating (PA-R), and either BMI or BF% to estimate VO<sub>2max</sub> using Jackson and colleagues' regression equations. The PA-R was assessed via a standardized questionnaire and categorized into four levels: sedentary, low, moderate, and high. <b>Results:</b> The key findings from this study indicate that both original models significantly underestimated actual VO<sub>2max</sub> in a large cohort of Iranian adults (both, <i>p</i> < .001 and mean differences exceeding 2.19 ml.kg<sup>-1</sup>.min<sup>-1</sup>). Nevertheless, these models provided accurate predictions for VO<sub>2max</sub> among individuals with moderate levels of physical activity (both, <i>p</i> > .08 and mean differences between 0.51 and 1.03 ml.kg<sup>-1</sup>.min<sup>-1</sup>). Furthermore, the models demonstrated moderate validity, as evidenced by an intraclass correlation coefficient (ICC) of 0.841 and a coefficient of variation averaging 10.9%, with a range from 8.5% to 13.6%. <b>Conclusions:</b> While Jackson's two non-exercise models showed limited accuracy in predicting VO<sub>2max</sub> among Iranian healthy male adults, they exhibited reasonable precision, particularly among moderately active men.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"953-962"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141494715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Physical Activity and Sedentary Behaviors Trends Among Black High School Students, 2009-2019. 2009-2019 年黑人高中生的体育锻炼和久坐行为趋势。
Research quarterly for exercise and sport Pub Date : 2024-12-01 Epub Date: 2024-06-20 DOI: 10.1080/02701367.2024.2351903
Tienna Fenton, Elena Bastida
{"title":"Physical Activity and Sedentary Behaviors Trends Among Black High School Students, 2009-2019.","authors":"Tienna Fenton, Elena Bastida","doi":"10.1080/02701367.2024.2351903","DOIUrl":"10.1080/02701367.2024.2351903","url":null,"abstract":"<p><p><b>Purpose:</b> Physical inactivity and sedentary behaviors are key contributors to the rising rates of childhood obesity. Though many adolescents are aware of the benefits of exercise, youth in America are not sufficiently active. This study examined changes in physical activity (PA), physical education (PE), and sedentary behaviors among Black adolescents. <b>Methods:</b> Pooled data from Black high school students (<i>n</i> = 2,233) who completed the Youth Risk Behavior Survey (YRBS) from 2009-2019 in Broward County, Florida, were analyzed. Logistic and linear regression models examined trends in selected physical activity indicators. <b>Results:</b> There were no significant changes in recommended physical activity levels (<i>p</i> = .829), daily physical activity (<i>p</i> = .44), PE class attendance (<i>p</i> = .054), or the average number of days of PA engagement (<i>p</i> = .304) for this time period. However, there was a significant decline in daily PE class attendance, the average number of days of PE attendance, and excessive television watching (<i>p</i> < .001). There were also increases in excessive video gaming and computer usage (<i>p</i> = .002). <b>Conclusion:</b> Adolescents' physical activity behaviors have not declined substantially over the past decade. However, sedentary behaviors, such as computer use and video gaming, have markedly increased. Results presented here should assist in broadening the understanding of Black adolescents' views on weight and physical activity and developing local programs and interventions to promote regular physical activity aimed at this population.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"920-929"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141433719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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