Universidad Internacional del Ecuador
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Evaluation of malignancies and F18-FDG PET/CT imaging of patients living with HIV/AIDS in a university hospital
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Effect of warm-up on visual response times in taekwondo athletes
No full textResponse time is a critical component of performance in combat sports, where quick visual processing and immediate motor response can determine the outcome of competition. This study aimed to examine the effect of a warm-up on the visual response times of youth taekwondo athletes. The study was approved by the Ethics Committee of the University (Decision Date: 23.06.2023, No: 63), and included 23 voluntarily participating taekwondo athletes (age: 14.39±1.85 years; height: 166.61±11.04 cm; body weight: 49.83±8.34 kg). Visual response times were measured using the Fitlight reaction system (Fitlight Sports Corp., Canada), applied three times to both the dominant and non-dominant hands, with the best score recorded. On the test day, athletes first completed the visual reaction test followed by a taekwondo-specific warm-up protocol and then repeated the test. Paired sample t-tests were used to compare pre- and post-warm-up results, as well as differences between hands. A significant difference was found between dominant and non-dominant hand response times both before (dominant: 0.60±0.04 s vs. non-dominant: 0.63±0.06 s) and after warming up (dominant: 0.57±0.04 s vs. non-dominant: 0.59±0.04 s) in favor of the dominant hand (p<0.05). Additionally, post-warm-up scores showed significant improvement compared to pre-test scores for both dominant (0.60±0.04 s vs. 0.57±0.04 s) and non-dominant hands (0.63±0.06 s vs. 0.59±0.04 s) (p<0.05). These findings suggest that warm-up exercises can positively influence visual response performance in youth taekwondo athletes, potentially contributing to improved readiness and performance during competition.</p
Accuracy of Micro Hole Negotiator and Other Techniques for Detecting MB2 Canals in Maxillary Molar Retreatment: A Prospective Cohort Study
No full textThis clinical study evaluated four diagnostic approaches for locating the orifice of the second mesiobuccal canal (MB2) during root canal retreatment of maxillary molars: direct visual inspection, the Micro Hole Negotiator electronic device, the dental operating microscope, and their combined use. A stepwise protocol was used in 124 retreatment cases, applying each method sequentially. Detection rates of MB2 canals increased progressively, with the combined use of the microscope and electronic device yielding the highest adjusted diagnostic efficiency, followed by the microscope alone, the electronic device alone, and direct visual inspection. These findings suggest that optical magnification and impedance-based electronic feedback can enhance canal identification, particularly under complex retreatment conditions. The electronic device outperformed direct visual inspection and may enhance the detection of MB2 canals in clinical settings where a microscope is unavailable