46 reads in the past 30 days
Comparison between Warm-Up Protocols in Post-Activation Potentiation Enhancement (PAPE) of Sprint and Vertical Jump Performance in a Female Futsal TeamDecember 2024
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101 Reads
Published by Taylor & Francis
Online ISSN: 2168-3824
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Print ISSN: 0270-1367
46 reads in the past 30 days
Comparison between Warm-Up Protocols in Post-Activation Potentiation Enhancement (PAPE) of Sprint and Vertical Jump Performance in a Female Futsal TeamDecember 2024
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101 Reads
42 reads in the past 30 days
Peak Kinematic and Mechanical Demands According to Playing Positions in Professional Male Soccer: Composition Analysis and Characteristics of Locomotor ActivitiesFebruary 2025
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42 Reads
36 reads in the past 30 days
Educator-Perceived Barriers and Facilitators to Structured-Physical Activity in Early Childhood Centres: A Systematic ReviewJune 2023
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617 Reads
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9 Citations
26 reads in the past 30 days
What Influences the Likelihood of Gross Motor Developmental Delay Among Preschoolers in the Rural United States?January 2025
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26 Reads
25 reads in the past 30 days
External Load of Different Length Microcycles and Relationships with Match Running Performance in Youth FootballSeptember 2024
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104 Reads
Research Quarterly for Exercise and Sport publishes research in the art and science of human movement, sport and exercise.
For a full list of the subject areas this journal covers, please visit the journal website.
February 2025
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2 Reads
February 2025
February 2025
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42 Reads
February 2025
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20 Reads
January 2025
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12 Reads
January 2025
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2 Reads
January 2025
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26 Reads
December 2024
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24 Reads
December 2024
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34 Reads
December 2024
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27 Reads
December 2024
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101 Reads
November 2024
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16 Reads
November 2024
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13 Reads
November 2024
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16 Reads
November 2024
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16 Reads
November 2024
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6 Reads
October 2024
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53 Reads
October 2024
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25 Reads
October 2024
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85 Reads
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% HRpeak,180-s recovery at 70% HRpeak; and 2) 16 × 1 min at 90% HRpeak, 45-s recovery at 70% HRpeak. 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 (Qtw) 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 (Qtw100) and 10:100 Hz ratio (Qtw10:Qtw100) were used as markers of high- and low-frequency performance fatigability, respectively. The MVIC, VA, Tw, Qtw100, and Qtw10:Qtw100 ratio decreased similarly from pre- to post-HIIE in both HIIE protocols (p < .05). The rating of perceived effort, blood pH, and plasma lactate responses were similar between HIIE protocols (p > .05), but the heart rate was higher in the longer HIIE protocol (p < .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.
October 2024
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70 Reads
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2 Citations
The Relative Age Effect (RAE) suggests older athletes within an annual cohort have advantages over their younger peers. We hypothesized that younger athletes could overcome these disadvantages through favorable α-actinin-3 (ACTN3) and angiotensin converting enzyme (ACE) polymorphisms. This study aimed to: 1) examine RAE prevalence among Brazilian football players; 2) investigate the distribution of the ACTN3 and ACE polymorphisms; and 3) explore the association between polymorphisms and RAE across competitive levels and positions. The sample included 627 male players from first-division Brazilian teams in four age categories: U15 (n = 172), U17 (n = 166), U20 (n = 161), and Professionals (n = 128). A control group was established using data from the general Brazilian population documented in previous studies. Results showed RAE presence across all competitive levels and positions. Players with the ACTN3 R allele, especially the RR genotype, had the strongest associations with football players, particularly among defenders. On the other hand, the distribution of ACE polymorphism was not significantly different between controls and players, except in the U17 category, where the I/I genotype was more common. Relatively older players had higher total genotype scores than younger counterparts in the overall sample and defender subgroups. In conclusion, RAE is prevalent among Brazilian football players, with older athletes benefiting from favorable ACTN3 and ACE polymorphisms, contrary to our initial hypothesis.
September 2024
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20 Reads
September 2024
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104 Reads
September 2024
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87 Reads
September 2024
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36 Reads
September 2024
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14 Reads
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