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Percorrer por autor "Teixeira, Diogo"

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  • Feasibility and reliability of the My Jump 2 smartphone application in measuring peak power, flight time and jump height in physically active subjects during two different jumping tasks
    Publication . Dias, Amândio; Pires, Paulo; Santana, Leandro; Marques, Paulo; Espada, Mário; Santos, Fernando; Silva, Eduardo Jorge; Teixeira, Diogo
    Muscle strength and power are often evaluated through jumping tasks. This study investigates the reliability of My Jump 2 (MJ2), a smartphone application (app) used for this assessment. Two commonly used jumps, the countermovement jump (CMJ) and squat jump (SJ), were analyzed. The study aimed to evaluate the reliability of MJ2 for assessing peak power, jump height, and flight time. Materials and Methods: Thirty-eight undergraduate students performed three jumps of each type in a randomized order. All jumps were executed on a contact mat and simultaneously recorded by the smartphone’s slow-motion camera. Two independent researchers analyzed the video data by identifying take-off and landing frames to calculate flight time. The intraclass correlation coefficient (ICC), coefficient of variation (CV), and Lin’s concordance correlation coefficient (CCC) were used for comparison. Results: Excellent reliability (ICC > 0.9) and high agreement were observed for flight time and jump height in both SJ and CMJ. Typical error and CV analysis indicated low variability for SJ, whereas CMJ jump height showed greater variability. However, peak power reliability and agreement were low (ICC < 0.5) for both jumps. Conclusions: The results suggest that MJ2 is a reliable and valid tool for assessing jump height and flight time, irrespective of the device used for data analysis. However, its power measurement capability differs from a contact platform’s, likely due to the indirect methods used to estimate power. Based on these findings, the MJ2 app can be confidently used to measure flight time and jump height but should be used cautiously when assessing power.
    2025-05Contributo em revista Acesso aberto Ver mais
  • Self-selected recovery in high-intensity interval training promotes positive responses in affect, pleasure, and mood in young people
    Publication . Sant’Ana, Leandro; Vianna, Jeferson Macedo; Travassos, Bruno; Nakamura, Fábio Yuzo; Teixeira, Diogo; Scartoni, Fabiana Rodrigues; Dias, Amândio; Antunes, Raul; Rodrigues, Filipe; Matos, Rui; Machado, Sérgio; Monteiro, Diogo
    Introduction: High-Intensity Interval Training (HIIT) with self-selected recovery can promote positive emotional responses. This study aimed to verify the acute responses to HIIT with fixed recovery and to select high scorers on the state of affect, enjoyment, and mood in healthy young people. Methods: Nineteen participants took part in the study (19.0±1.0 years, 64.0±9.2 kg, 169.1±8.5, and 22.0±2.0 BMI). They performed 10 x 30 s (95% Vpeak) with 1 min recovery (HIITRecA - active - 40% Vpeak) and self-selected (HIITRec-B). Affect, enjoyment, and mood were assessed before and after HIIT (both conditions). Results: In both conditions, for time 1 and 2 were positive in positive (p=.170, EF: .102) and negative (p=.0.90, EF: .151) affect, pleasure (p=.010, EF: .315), and mood domains (tension: p<.001, EF: .673; depression: p=.015, EF: .286), anger: p=.033, EF: .230, and mental confusion: p<.001, EF: .451). In contrast, there was a reduction in the vigor domain and an increase in fatigue, with no differences in all emotional variables for condition and time*condition (p>.05). Conclusion: Thus, selected self-recovery may be a strategy in prescribing HIIT with possibilities of not interfering with the emotional aspects, researched here.
    2026-02Contributo em revista Acesso aberto Ver mais