Research quarterly for exercise and sport最新文献

{"title":"Sodium Nitrate Improves Oxidative Energy Contribution and Reduces Phosphocreatine Contribution During High-Intensity Intermittent Exercise.","authors":"Henrique Silva Sacramento, Lucas Chalegre da Silva, Marcelo Papoti, Fabrício Eduardo Rossi, Willemax Dos Santos Gomes, André Dos Santos Costa, Eduardo Zapaterra Campos","doi":"10.1080/02701367.2024.2396146","DOIUrl":"10.1080/02701367.2024.2396146","url":null,"abstract":"<p><p>The present study aimed to verify the effect of acute nitrate supplementation on oxidative, phosphocreatine, and glycolytic energy contribution (C_OXI, C_PCr, and C_LAC^, respectively) during a high-intensity intermittent exercise (HIIE). Fifteen physically active subjects were submitted to incremental running test on a treadmill and two random HIIE (10 × 1 min at maximal aerobic speed with 1 min of passive recovery) in the following conditions: sodium nitrate (SN) or Placebo (PL). Repeated measure ANOVA was used to compare C_OXI, and C_PCr within the 10 efforts. Student t test was used to compare total C_OXI, C_PCr, C_LAC, as well oxidative and non-oxidative contribution. Considering the 10 efforts, C_OXI presented the main effect for condition (F = 16.7; <i>p</i> = .001; SN: 1.9 ± 0.1 L; PL: 1.6 ± 0.1 L), and no interaction effect (F = 0.9; <i>p</i> = .415), while C_PCr presented effect for condition (F = 13.4; <i>p</i> = .003; SN: 1.2 ± 0.1; PL: 1.4 ± 0.8 L), and no interaction (F = 1.2; <i>p</i> = .317). Total oxidative contribution were higher (<i>p</i> < .001) after SN (19.1 ± 3.4 L) than Placebo (16.7 ± 3.1 L), while total C_PCr were lower (<i>p</i> = .002) after SN (12.4 ± 2.5 L) than PL (14.1 ± 2.6 L). Total energy contribution were not different between trials. Acute dose of SN supplementation improved oxidative contribution during HIIE, and reduced C_PCr. Higher C_OXI is likely related to increased oxygen kinetics, while the lower C_PCr might be related to the improved energetic efficiency.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"259-264"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142157094","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}

{"title":"The Effect of Isometric Handgrip Training With and Without Blood Flow Restriction on Changes in Resting Blood Pressure.","authors":"Robert W Spitz, Vickie Wong, Yujiro Yamada, Ryo Kataoka, Jun Seob Song, William B Hammert, Aldo Seffrin, Zachary W Bell, Jeremy P Loenneke","doi":"10.1080/02701367.2024.2418567","DOIUrl":"10.1080/02701367.2024.2418567","url":null,"abstract":"<p><p>To investigate the effects of high-intensity contractions and low-intensity contractions with and without blood flow restriction on changes in blood pressure and hemodynamic parameters. A total of 179 participants (18-35 years) were randomly assigned to one of three training groups that exercised 3 times per week for six weeks or a non-exercise control group. The groups are as follows: 1) Control [CON, <i>n</i> = 44]; 2) completed 4 sets of two-minute isometric contractions at 30% maximal voluntary contraction [LI, <i>n</i> = 47]; 3) completed 4 sets of two-minute isometric contractions at 30% maximal voluntary contraction with a 12 cm cuff inflated to 50% of arterial occlusion pressure [LI+BFR, <i>n</i> = 41]; or 4) completed 4 maximal isometric contractions lasting 5 seconds [MAX, <i>n</i> = 47]. Blood pressure, vascular resistance, and reactive hyperemia were measured at pre and post. Data are presented as means (SD). There was no evidence that SBP (BF₁₀: 0.066), DBP (BF₁₀: 0.057), vascular resistance (BF₁₀: 0.085), or peak reactive hyperemia changed (BF₁₀: 0.044) or A.U.C. (BF₁₀: 0.074). Change scores for SBP were 1.1 (6.7), 0.7 (5.8), -0.4 (6.5), and -0.9 (6.3) mmHg for CON, LI, LI+BFR, and MAX, respectively. DBP change scores were 1.5 (6.6), 1.5 (7), -0.7 (5.9), and 0.3 (6.3) mmHg for CON, LI, LI+BFR, and MAX, respectively. Although recommended as a non-pharmacological method of blood pressure control, isometric exercise with or without BFR did not lower blood pressure. Future work could examine the inclusion of a daily strength test prior to the low intensity protocol.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"418-425"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142684053","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}

{"title":"The Distance Effect in Focus of Attention: Spatial or Temporal Distance?","authors":"Yonjoong Ryuh, Cole Geschwender, Joonhee Kim, Kevin Becker","doi":"10.1080/02701367.2024.2413860","DOIUrl":"10.1080/02701367.2024.2413860","url":null,"abstract":"<p><p><b>Purpose:</b> The benefit of an external focus over an internal focus has been well-established. Within this literature, several studies have documented a distal effect of attentional focus by comparing the efficacy of a proximal and distal external focus. A potential confound is that most distal focus cues direct the performer's attention to an outcome occurring after the completion of movement, while the proximal cues direct attention to something that occurs during the movement process. This study aims to disentangle whether the distal effect of attentional focus comes from spatial distance (proximal vs. distal) or temporal distance (during vs. after). <b>Method:</b> To test this, we employed a two-handed underhand medicine ball throw for maximum distance with 38 healthy young adults. This study employed five conditions: baseline, internal-during, internal-after, external-during, and external-after focus. <b>Results:</b> The result indicated that both external-during and -after foci elicited a significantly greater throwing distance than internal-during (<i>p</i> = .006) and internal-after (<i>p</i> < .001), where internal-after even significantly underperformed than baseline (<i>p</i> = .02). <b>Conclusion:</b> Our findings indicate that using an outcome cue unrelated to the intended action does not enhance motor performance. Rather, the most effective approach is to use an external cue that represents the action effect either during or after the movement.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"401-406"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142678141","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}

{"title":"Choosing Your Sports Partners: Assessing Selection Preferences Through Observational and Experimental Studies.","authors":"Rob Franken, Hidde Bekhuis, Jochem Tolsma","doi":"10.1080/02701367.2024.2389907","DOIUrl":"10.1080/02701367.2024.2389907","url":null,"abstract":"<p><p>Previous research has demonstrated the positive impact of doing sports together on maintaining physical activity levels. Yet, there remains a gap in understanding the selection processes leading to sports partnerships. We address this question using a two-study design. Study 1 examines longitudinal ego-network data; we analyze data of 1,222 sports partnerships among 409 Dutch university students. We find that emotional closeness, rather than skill similarity, is a key determinant of sports partnership continuation over time. We do not find that the sports setting in which sports partnerships are embedded (i.e. sports clubs, informal groups, commercial gyms, unorganized settings) affect the stability of sports partnerships. Study 2 employs a discrete choice experiment, in which individuals are tasked to choose a sports partner out of choice-sets consisting of three sports partners who vary in the types of motivations and resources they offer (i.e. social comparison, knowledge, companionship, encouragement). People express a strong preference for sports partners who emphasize social aspects of sports, but as individuals become more active, sports partners who emphasize social comparison and who are knowledgeable about sports gain attractiveness. We discuss the implications of these findings for tailored strategies leveraging social networks to promote sports participation.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"233-247"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142116660","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}

{"title":"The Happy and Hopeful NCAA Division I Athlete: Predicting Well-Being and Ill-Being in Elite Student-Athletes Who Participate in Sport.","authors":"Edward C Chang","doi":"10.1080/02701367.2024.2415370","DOIUrl":"10.1080/02701367.2024.2415370","url":null,"abstract":"<p><p>The role of hope and happiness in accounting for mental health, both well-being (viz. life satisfaction & flourishing) and ill-being (depressive symptoms & suicidal ideation), using a cross-sectional design, was examined in a diverse sample of 140 elite student-athletes (88 female & 52 male NCAA Division I athletes, representing 16 different varsity sports, <i>M</i>_age = 20.0) who completed a battery of self-report measures. Results from conducting a series of hierarchical regression analyses, controlling for demographic factors and perceived sport performance (individual & team), indicated hope and happiness (as a positive personality set) accounted for additional unique variance in all indices of well-being and ill-being. However, although happiness emerged as a significant statistical predictor of all indices of well-being and ill-being, hope only emerged as a significant statistical predictor across indices of well-being. Importantly, the inclusion of the Hope × Happiness interaction term consistently added further incremental validity to the prediction of additional unique variance in all indices of mental health in student-athletes. However, evidence for the doubling-up hypothesis was only found in predicting indices of well-being, not ill-being. Taken together, the present findings provide strong evidence for the importance of integrating positive individual differences variables for understanding mental health in elite student-athletes.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"407-417"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142684113","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}

{"title":"The Influence of Mental Fatigue on Physical Performance and Its Relationship with Rating Perceived Effort and Enjoyment in Older Adults.","authors":"Larissa Oliveira Faria, Leonardo de Sousa Fortes, Maicon Rodrigues Albuquerque","doi":"10.1080/02701367.2024.2409932","DOIUrl":"10.1080/02701367.2024.2409932","url":null,"abstract":"<p><p>The study investigated the influence of mental fatigue on older people's enjoyment during a series of physical exercises. Using a randomized cross-over design, participants (<i>n</i> = 35) completed a 6-minute walking test - 6MWT, a Timed Up and Go-TUG test and three sets of knee extension exercise (first set: KE1, second set: KE2, third set: KE3) under two experimental conditions (control or mental fatigue). The Nonparametric Analysis of Longitudinal Data in Factorial Experiments was used to compare the number of repetitions performed during three sets of resistance exercise between conditions. The same analysis method was applied to compare the perception of effort and enjoyment across five moments (Post-6MWT, Post-TUG, Post-KE1, Post-KE2, Post-KE3) and two conditions and the Visual Analogue Scales (VAS) across four moments (baseline, Pre-6MWT, Pre-TUG, Pre-KE) and two conditions. Mental fatigue did not affect the physical function, perception of effort and enjoyment of exercise in older people. Participants, however, reported higher enjoyment for walking and dynamic balance compared to strength exercise. Mental fatigue had no effect on the physical function, perception of effort and enjoyment of exercise of older people. Participants presented a higher enjoyment for walking and dynamic balance compared to strength exercise. Given the importance of resistance exercises for health, clinicians should prioritize resources to education programs emphasizing the benefits of resistance exercise in both short- and long-term health. Including social interaction opportunities in physical exercise programs and prescribing activities appropriate to participants' ability levels could enhance engagement and adherence.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"356-370"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142515626","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}

{"title":"Increased Ventilatory Efficiency in Supramaximal Compared to Graded Exercise in Athletes.","authors":"Juliana Peroni Abrahão Barbosa, Wandriane de Vargas, Sebastián Del Rosso, Christiane Coelho Ravagnani, Daniel A Boullosa, Paulo de Tarso Muller","doi":"10.1080/02701367.2024.2398577","DOIUrl":"10.1080/02701367.2024.2398577","url":null,"abstract":"<p><p><b>Background</b>: Supramaximal constant work rate tests (CWR) elicit intense hyperventilation, thus potentially up-shifting ventilation (⩒_E)-to-carbon dioxide (CO₂) responses when compared to graded exercise tests (GXT) in athletes. We predicted higher ventilatory efficiency on supramaximal CWR using a new method, challenging the classic orthodox interpretation of an increased ⩒_<i>E</i>-⩒CO₂ as ventilatory inefficiency. This misinterpretation could make difficult to differentiate between physiological hyperventilation from heart disease conditions in athletes. <b>Methods</b>: On different days, a GXT and a CWR at 110% of the maximal velocity achieved in the GXT were performed. Twenty-seven athletes completed the two tests and were compared for usual (linear regression) and log-transformed new variables for ventilatory efficiency through paired <i>t</i>-Student statistics. <b>Results</b>: The ⩒_<i>E</i>-⩒CO₂ slope (31.4 ± 4.9 <i>vs</i>. 26.2 ± 3.4, <i>p</i> < .001), ⩒_<i>E</i>-⩒CO₂ intercept (7.2 ± 7.5 <i>vs</i>. 2.8 ± 4.2, <i>p</i> < .007), ⩒_<i>E</i>/⩒CO₂ nadir (33.0 ± 3.6 <i>vs</i>. 25.4 ± 2.2, <i>p</i> < .001), ⩒CO₂-log⩒_<i>E</i> slope (10.8 ± 2.9 <i>vs</i>. 6.9 ± 2.2 L_*logL^-1, <i>p</i> < .001), and η⩒^<i>E</i> (36.0 ± 12 <i>vs</i>. 22.8 ± 8.1%, <i>p</i> < .001) values were all significantly higher in the CWR compared to the GXT. We registered a bi-modal nadir response for ⩒_E/⩒CO₂ on CWR for 22 out of 27 subjects for the first time. A weak association was observed between ⩒_<i>E</i>/⩒CO₂ nadir (coefficient of determination ~ 27%) and time to exhaustion. <b>Conclusions</b>: The new method allows us to improve the quantification and interpretation of ventilatory efficiency in athletes, avoiding misinterpretation due to the up-shifting elicited by the usual ⩒_<i>E</i>-⩒CO₂ slope and ⩒_<i>E</i>/⩒CO₂ nadir indices, which may be confounded with ventilatory inefficiency. This study suggests that ventilatory changes underpin better ventilatory efficiency during CWR.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"265-272"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142157093","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}

{"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":"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":"439-446"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","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}

{"title":"Jazz Dance on Menopausal Symptoms and Psychological Aspects: A Randomized Clinical Trial Pilot Study With Follow-Up.","authors":"Julia Beatriz Bocchi Martins, Danielly Yani Fausto, Fabiana Sperandio Flores, Anelise Sonza, Thiago Sousa Matias, Adriana Coutinho de Azevedo Guimarães","doi":"10.1080/02701367.2024.2406401","DOIUrl":"10.1080/02701367.2024.2406401","url":null,"abstract":"<p><p>To analyze the short-term (one month intervention and post-intervention) and long-term (six-month follow-up) effects of Jazz Dance on menopausal symptoms (somatic, psychological and urogenital), in addition to the psychological aspects in specific (anxiety, depression, mood, stress, and aging perspective), compared to the control group of menopausal women. Randomized clinical trial with early postmenopausal women divided into two groups: Jazz Dance Intervention Group (GIDJ) (<i>n</i> = 23), and control group (CG) (<i>n</i> = 24). The physical exercise group received interventions of two weekly sessions of 60 minutes each, for 16 weeks. The control group received monthly calls, educational lectures, and maintained their usual activities during the intervention period. Assessments with all participants occurred at baseline, after the 1st month, after the interventions, and at the six-month follow-up. The evaluations are assessed by questionnaires and include menopausal symptoms (Menopause Rating Scale), depressive and anxiety symptoms (Anxiety and Depression Scale), stress (Perceived Stress Scale), mood (Brunel Mood Scale), and aging perspective (Sheppard Inventory). There was a significant improvement in GIDJ outcomes post-intervention, such as menopausal symptoms (<i>p</i> = .001), psychological aspects (anxiety (<i>p</i> =  <.001), depression (<i>p</i> = .016) and stress (<i>p</i> = .030)); in the integrity domain (<i>p</i> = .011) for the aging perspective, and in the confusion (<i>p</i> = .028) and vigor (<i>p</i> = .044) domains for mood. Furthermore, the CG showed significant improvements in the happiness domain at one month of intervention (<i>p</i> = .043) from the perspective of aging. Jazz Dance is effective in treating symptoms of menopause, depression, anxiety and stress, especially with an intervention of at least 16 weeks duration.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"316-326"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142335474","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}

{"title":"Neural and Muscular Determinants of Performance Fatigability Are Independent of Work and Recovery Durations During High-Intensity Interval Exercise in Males.","authors":"Lucas Chalegre Da Silva, Kleber Johny Da Silva, Leandro Camati Felippe, Marcos David Silva-Cavalcante, Rafael Dos Santos Henrique, Adriano Eduardo Lima-Silva, Carol Góis Leandro, Guilherme Assunção Ferreira","doi":"10.1080/02701367.2024.2407891","DOIUrl":"10.1080/02701367.2024.2407891","url":null,"abstract":"<p><p>The present study aimed to investigate the effect of two protocols of high-intensity interval exercise (HIIE) on performance fatigability and its neural and muscular determinants. On different days, 14 healthy males performed two HIIE protocols with different work and recovery durations (matched for total duration, work and recovery intensities, and density): 1) 4 × 4 min at 90% HR_peak,180-s recovery at 70% HR_peak; and 2) 16 × 1 min at 90% HR_peak, 45-s recovery at 70% HR_peak. Pre- to post-HIIE reduction in maximal voluntary isometric contraction (MVIC) was used as marker of performance fatigability, while voluntary activation (VA) and potentiated quadriceps twitch force (Q_tw) as markers of the neural (i.e. central fatigue) and muscular (i.e. peripheral fatigue) determinants, respectively. In addition, pre- to post-HIIE reduction in twitch force stimulated at 100 Hz (Q_tw100) and 10:100 Hz ratio (Q_tw10:Q_tw100) were used as markers of high- and low-frequency performance fatigability, respectively. The MVIC, VA, T_w, Q_tw100, and Q_tw10:Q_tw100 ratio decreased similarly from pre- to post-HIIE in both HIIE protocols (<i>p</i> < .05). The rating of perceived effort, blood pH, and plasma lactate responses were similar between HIIE protocols (<i>p</i> > .05), but the heart rate was higher in the longer HIIE protocol (<i>p</i> < .05). In conclusion, performance fatigability and its neural and muscular determinants seemed to be independent of the work and recovery durations of the HIIE, at least when HIIE protocols were matched for total work duration, work and recovery intensities, and density. Further, HIIE with long work and recovery might be preferable when the intention is to stress the chronotropic response.</p>","PeriodicalId":94191,"journal":{"name":"Research quarterly for exercise and sport","volume":" ","pages":"338-348"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142376488","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}