Degree in Sports and Physical Education (ISMAI).
Master in Sports for children and youth (FADE-UP).
PhD in Sports Sciences (FADE-UP).
RESEARCH INTERESTS
The current research interests are: (i) motor control, (ii) youth sports performance, (iii) cognitive performance in sports. She is a coordinator of the Fit4Alz Project granted by the UE 2022.
Physical Fitness and External Training Load Represent Distinct Dimensions of Performance in Female Football Players During the Pre-Season Artur Avelino Birk Preissler, Filipe Manuel Clemente, Ewerton Luiz Bourscheid da Rocha, Rui Miguel Silva, Ana Filipa Silva, et al. Sports, 2026 Monitoring performance in football often combines physical testing and GPS-derived external-load measures, although their relationships remain unclear. This study examined the relationships between physical-test outcomes and GPS-derived external-load variables during the pre-season in professional female football players and whether these measures appear to capture distinct dimensions of performance. This observational study monitored 24 outfield players from a Brazilian Women’s First Division team during a 6-week pre-season. Players performed the countermovement jump, 10 m and 30 m sprints, change-of-direction test, and 30–15 intermittent fitness test while external load was recorded across field sessions. Associations were examined using Pearson’s or Spearman’s correlations, and principal component analysis (PCA) was applied. Significant correlations were more frequent within than between domains. Total distance correlated with accelerations (ρ = 0.740, p < 0.001), decelerations (ρ = 0.684, p < 0.001), Z3 distance (ρ = 0.595, p = 0.003), and Z4 distance (ρ = 0.584, p = 0.003), while sprint count correlated with sprint distance (r = 0.950, p < 0.001). Estimated VO2max correlated positively with CMJ (r = 0.533, p = 0.007) and negatively with 10 m (r = −0.445, p = 0.029) and 30 m sprint times (r = −0.476, p = 0.019). PCA identified two components explaining 61.4% of the total variance: external load (40.6%) and physical performance (20.8%). These findings indicate that both approaches capture distinct and complementary aspects of performance.
Comparison of Anthropometric and Physical Performance Profiles in Elite Judo and Jiu-Jitsu Athletes Artur Avelino Birk Preissler, Filipe Manuel Clemente, Marcela Zimmermann Casal, Rui Miguel Silva, Ana Filipa Silva, et al. Sports, 2026 Combat-sport performance depends on the interaction between technical skills and physical capacities, yet direct comparisons between grappling disciplines remain limited. The aim of this study was to compare the anthropometric profile and physical performance of elite judo and jiu-jitsu athletes. This cross-sectional study included 25 elite male athletes (judo—n = 12; jiu-jitsu—n = 13) assessed during a preparatory training phase. Anthropometric measures included age, training experience, height, and body mass, while physical performance was evaluated using dominant and non-dominant handgrip strength, squat jump (SJ), countermovement jump (CMJ), medicine ball throw with and without countermovement, and dynamic and isometric judogi-grip pull-up tests. Between-group comparisons were performed using independent sample tests, with effect sizes (ES) calculated. Judo athletes had greater training experience (13.25 ± 2.73 vs. 7.85 ± 4.36 years; p = 0.001; ES = 1.472) and higher SJ performance (38.71 ± 6.69 vs. 33.82 ± 4.74 cm; p = 0.045; ES = 0.850) compared to jiu-jitsu athletes. No significant between-group differences were observed for the remaining variables (p > 0.05). These findings indicate that no statistically significant differences were detected in most anthropometric and physical performance variables between elite judo and jiu-jitsu athletes, and the initially higher squat jump performance observed in judo athletes was no longer statistically significant after adjustment for training experience.
The effects of active breaks on sustained attention among sports college students Ana Filipa Silva, Rui Miguel Silva, Francisco Tomás González-Fernández Health Education Journal, 2026 Objective: This study aimed to analyse the acute effects of active breaks (AB) on vigilance among sports college students in Portugal. Methods: Thirty-two students following a sports degree programme (24 males and 8 females, aged 20.7 ± 2.5 years) voluntarily participated in this crossover randomised study. All participants completed a psychomotor vigilance task (PVT), a reaction time task widely used to assess sustained attention and alertness, during a regular class session. Afterwards, they attended a 60-minute lecture before repeating the PVT. A 10-minute break ensued: half the participants remained seated passively (control condition), while the other half performed moderate-intensity individual calisthenic exercises (AB condition). A three-way repeated-measures analysis of variance (ANOVA) was conducted to examine the effects of condition (control vs AB), time-on-task (minutes 1–5) and assessment moment (baseline, pre, post). Results: No significant main effects of condition were found; however, a significant three-way interaction between condition, time and assessment moment ( p = .025) was evident. Post hoc comparisons revealed a significant increase in reaction time from minute 3 to minute 5 during the post-intervention PVT in the AB condition, suggesting potential fatigue or reduced vigilance over time. Conclusion: These findings indicate that ABs may transiently affect vigilance, but their effects may not persist during prolonged tasks. Further research is warranted to determine the optimal parameters for implementing ABs in an academic context, particularly among physically active populations.
Decoding Positional Variability in U18 Semi-Professional Soccer Players: A Principal Component Analysis Utilizing Inertial Measurement Units to Identify Key Determinants José Carlos Barbero-Álvarez, José Antonio Sánchez Fuentes, Luis Manuel Martínez-Aranda, Filipe Manuel Clemente, Ana Filipa Silva Applied Sciences Switzerland, 2026 This study investigates the performance characteristics of U18 semi-professional soccer players by examining both technical load (TL) and physical load (PL) variables across various playing positions during the 2021/2022 Spanish Football U18 National League Championship. Methods: Principal Component Analysis (PCA) was employed to simplify the dataset, which comprised 246 match records from 49 athletes (mean age 17.9 ± 0.7 years; height ~177.6 ± 6.3 cm; body mass ~72.0 ± 7.2 kg) across ten matches. This analytical approach aimed to facilitate a deeper understanding of player performance dynamics. Results: Kaiser–Meyer–Olkin (KMO) values varied across positions (technical load: 0.20–0.93; physical load: 0.27–0.91). This indicates acceptable sampling adequacy for several positional models, but low adequacy for others; therefore, results for positions with low-KMO values should be interpreted cautiously. Factor analysis for both technical and physical load variables identified two components each, explaining substantial total variance (technical load: 63.75–86.65%; and physical load: 71.74–88.92% across position), with significantly high factor correlations (p < 0.001). The findings further indicate that players occupying defensive positions, such as goalkeepers and center-backs, generally exhibit lower levels of physical intensity and technical engagement compared to their counterparts in more dynamic roles, including full-backs, wingers, and forwards. The latter groups demonstrate higher involvement in high-intensity running and offensive actions. Conclusions: The observed performance patterns highlight the necessity for tailored training programs that align with the specific demands of each playing position. This approach is expected to optimize individual player performance and enhance overall tactical efficiency. Furthermore, the study underscores the importance of developing individualized conditioning strategies that address the unique physical and technical requirements inherent to each role on the field. This analytical approach using PCA provides a more structured and data-driven understanding of these positional differences, reinforming the need for tailored training programs and individualized conditioning strategies.
Menarche, somatic maturity, and physical fitness in Portuguese girls: an intergenerational analysis based on the Mirwald equation Ana Filipa Silva, Samuel Honório, Mario Espada, Francisco González-Fernández Human Movement, 2026 Purpose This study aimed to assess age at menarche in Portuguese girls and compare it with their mothers, examine its association with somatic maturity estimated by the Mirwald equation, and characterise physical fitness in pre- and post-pubertal girls. Material and methods 71 Portuguese girls (10–13 years, post-menarche) completed a questionnaire on menarcheal age (self and mothers), anthropometric assessments (height, sitting height, body mass, waist circumference), and physical fitness tests (handgrip, isometric mid-thigh pull, 3-min Kasch Pulse Recovery Test). Somatic maturity was estimated with the Mirwald equation. Analyses included paired and independent t-tests, effect sizes, correlations, and agreement (Bland–Altman, Lin’s CCC). Results Pre-PHV girls had negative maturity offset values (–0.58 ± 0.62 years), while post-PHV girls were beyond PHV (1.28 ± 0.91 years). Mean age at menarche was 10.87 ± 0.93 years, significantly earlier than their mothers (12.00 ± 1.44 years; mean difference = –1.09, <i>p</i> < 0.001). Post-PHV girls showed higher absolute strength (handgrip right: 18.86 ± 3.68 vs. 12.74 ± 3.10 kg, <i>d</i> = 1.72; IMTP: 63.46 ± 12.54 vs. 45.58 ± 11.93 kg, <i>d</i> = 1.44), while relative strength differences were smaller (handgrip: 0.35 ± 0.08 vs. 0.30 ± 0.09 kg/kg, <i>d</i> = 0.67). Endurance did not differ. The Mirwald equation underestimated years since menarche by 0.94 ± 1.10, with weak agreement (Lin’s CCC = 0.37). Conclusions Biological maturation strongly influenced absolute strength, largely explained by body size. Relative strength and maturity offset-based estimates of years since menarche showed weaker validity, highlighting the need for refined prediction models.
Editorial: Decision-Making in Youth Sport Ana Filipa Silva, José Afonso, Hugo Sarmento, Sixto González-Víllora, Juan Carlos Pastor Vicedo, et al. Frontiers in Psychology, 2021
