Percorrer por autor "Dias, Amândio"
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- Concurrent validity and reliability of a free smartphone application for evaluation of jump heightPublication . Dias, Amândio; Pires, Paulo; Santana, Leandro; Marques, Paulo; Espada, Mário C.; Santos, Fernando; Silva, Eduardo Jorge da; Rebelo, André; Teixeira, Diogo S.Background/Objectives: Jump test assessment is commonly used for physical tests, with different type of devices used for its evaluation. The purpose of the present study was to examine the validity and reliability of a freely accessible mobile application (VertVision, version 2.0.5) for measuring jump performance. Methods: With that intent, thirty-eight college age recreationally active subjects underwent test assessment after a specific warm-up, performing countermovement jumps (CMJs) and squat jumps (SJs) on a contact platform while being recorded with a smartphone camera. Jump height was the criterion variable, with the same formula being used for both methods. Data analysis was performed by two experienced observers. Results: The results showed strong correlations with the contact platform (ICC > 0.9) for both jumps. Furthermore, between-observer reliability was also high (ICC > 0.9; CV ≤ 2.19), with lower values for smallest worthwhile change (≤0.23) and typical error of measurement (≤0.14). Estimation error varied when accounting for both observers, with the SJ accounting for bigger differences (4.1–6.03%), when compared to the CMJ (0.73–3.09%). Conclusions: The study suggests that VertVision is a suitable and handy method for evaluating jump performance. However, it presents a slight estimation error when compared to the contact platform.
- A influência do treino proprioceptivo no tempo de latência dos músculos peroniais laterais, gémeo externo e tíbial anteriorPublication . Dias, Amândio; Correia, Pedro; Esteves, José Manuel; Fernandes, Orlando
- The influence of a balance training program on the electromyographic latency of the ankle musculature in subjects with no history of ankle injuryPublication . Dias, Amândio; Correia, Pedro; Esteves, José Manuel; Fernandes, Orlando
- Validity and reliability of My Jump 2 app for jump performance in judo playersPublication . Soares, Denise; Rodrigues, Catarina; Lourenço, Joana; Dias, AmândioBackground: The height of the jump is an essential factor in judo because through this parameter, coaches can assess the power of the lower limbs, which is essential in the performance of judo techniques. The My Jump 2 (MJ2) application is a validated application to calculate the jump height, however, to the best of our knowledge, no study has tested this smartphone application in judokas. Objective: The objective of this study is to analyse the validity and reliability of the app MJ2 for measuring jump height in judokas. Methods: Twenty-one judokas were recruited, who performed 2 countermovement jumps on the Chronojump platform (42 jumps). Simultaneously, the videos of the jumps were captured using recommendations in the app and were later processed and analyzed independently by two evaluators. Results: The data revealed a good correlation for the calculated jump height with both tools used. In the Bland-Altman analysis, it was observed that the differences between instruments and the inter-evaluator differences were quite low. According to the Pearson correlation (MJ2 vs CJ), the value was r=0.97. As for the height of the jump measured using the MJ2 app, an average of 26.38 ± 8.89 cm and 26.25 ± 8.14 was obtained for each evaluator, while the average for the Chronojump platform was 26.69 ± 8.14. Conclusion: The concordant data and correlation found indicate that MJ2 application can be used as a method to estimate jump height in judokas.