Browsing by Author "Franchini, Emerson"

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    Can simulation tasks reproduce the taekwondo match physiological responses?
    (2018) Herrera-Valenzuela, Tomás; Zapata-Bastías, José; Guajardo-Medrano, Marcos; Pons-Vargas, Gonzalo; Valdés-Badilla, Pablo; Ferreira Da Silva Santos, Jonatas; Garcia-Hermoso, Antonio; López-Fuenzalida, Antonio; Franchini, Emerson; Orihuela, Pedro
    Background and Study Aim: Using specific training methods is an important aspect in the preparation of taekwondo athletes. The purpose of the present study was the knowledge about physiological responses, during three different training protocols and official taekwondo matches./Material and Methods: Eleven black-belt taekwondo athletes: age 24 ±5 years; body mass 76.8 ±15.3 kg; height 178 ±0.1 cm and MBI 24.1 ±3.7 kg/m2) completed a official taekwondo competition and three experimental conditions of training (2 , 4 and 6 kicks bandal tchagui, each 10 seconds, respectively) with the same total duration (3 rounds of 2 min with 1 min rest between each round), the physiological variables were measured, blood lactate concentration, heart rate (HR) and rating of perceived exertion (RPE)./Results: For the HRpeak a round effect was identified (F1.294; 12.936 = 59.940; p<0.001, η2 = 0.857 [large]), with round 2 was superior to round 1 (p = 0.001), round 3 was superior to round 1 (p<0.001) and round 2 (p<0.001). For te blood lactate concentration a round effect was identified (F3; 30 = 133.441; p<0.001, η2 = 0.930 [large]), with lower values being observed at pre compared to all post-rounds measurements (p<0.001 for all comparisons)./Conclusions: The taekwondo exercise reached the same heart rate peak and blood lactate concentration that the rates presented during the taekwondo match, therefore, can replicate the physiological response of the official competition. However, it will be necessary to verify the effects of more prolonged periods of these exercises to know if the stress generated is adequate to improve the physical performance.
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    Effect of a Short HIIT Program with Specific Techniques on Physical Condition and Activity during Simulated Combat in National-Level Boxers
    (2021-08-05) Herrera Valenzuela, Tomás; Carter, Johan; Leiva, Elvis; Valdés Badilla, Pablo; Ojeda Aravena, Alex; Franchini, Emerson
    The present study investigated the effect of an additional short-duration HIIT program using boxing-specific techniques on activity during a simulated competition. Additionally, we investigated the impact on physical fitness, specifically aerobic performance and lower-body muscle power. Sixteen boxers were randomized into a control (n = 8) or experimental groups (n = 8). The experimental protocol consisted of 3 blocks of 5 repetitions of 30s all-out effort, with 6s recovery between repetitions and 1 min rest interval between blocks, conducted 3 days per week for 4 weeks. A two-way (group, two levels; moment, two levels) analysis of variance with repeated measurements in the second factor was used. For the experimental group, there was a change in body mass (ES = −0.13 (trivial)), body fat percentage (ES = −0.12 (trivial)), VO2max (ES = +0.42 (small)), CMJ (ES = +0.12 (trivial)), CMJ-left (ES = −0.11 (trivial)), CMJ-right (ES = +0.22 (trivial)), actions (ES = +0.68 (moderate)), time (ES = −0.29 (small)) and punches (ES = +0.56 (moderate)). For the control group, there was a change in body mass (ES = +0.04 (trivial)), body fat percentage (ES = −0.12 (trivial)), VO2max (ES = +0.11 (trivial)), CMJ (ES = −0.27 (small)), CMJ-left (ES = −0.39 (small)), CMJ-right (ES = +0.08 (trivial)), actions (ES = +0.08 (trivial)), time (ES = −0.65 (moderate)) and punches (ES = −0.57 (moderate)). The punches variable was significant concerning group-by-time interaction (F1,14 = 11.630; p = 0.004; n2 = 0.454). The present study indicated that the addition of a boxing-specific HIIT program is effective to increase the number of punches during a simulated match.
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    Effects of Strength Training on Physical Fitness of Olympic Combat Sports Athletes: A Systematic Review
    (2023-02-16) Cid-Calfucura, Izham; Herrera-Valenzuela, Tomás; Franchini, Emerson; Falco, Coral; Alvial-Moscoso, Jorge; Pardo-Tamayo, Carolina; Zapata-Huenullán, Carolina; Ojeda-Aravena, Alex; Valdés-Badilla, Pablo
    This review aimed to identify the effects of strength training programs on the physical fitness of Olympic combat sports (OCS) athletes. The systematic review included peer-reviewed articles that incorporated interventions that included pre- and post-intervention physical fitness assessment. The search was performed in the SCOPUS, PubMed, and Web of Science databases between April and September 2022. PRISMA and the TESTEX checklist were used to select and assess the methodological quality of the studies. Twenty studies with 504 participants (428 males and 76 females) were included. Significant improvements were found in athletes’ maximal dynamic and isometric strength, muscle power, flexibility, and balance. In addition, improvements in favor of the training groups in specific actions of judo, karate, fencing, and boxing were observed. In conclusion, interventions aimed at the development of muscle strength in OCS, specifically in judo, boxing, karate, wrestling, and fencing, proved to be beneficial at a physical fitness level, resulting in significant increases in favor of the training groups with OCS, which could be used by trainers and coaches to improve the physical performance of athletes.
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    Relation between VT1, VT2, and VO2max with the Special Wrestling Fitness Test in Youth Wrestlers: A Short Report
    (2023-01-31) Herrera-Valenzuela, Tomás; Franchini, Emerson; Valdés-Badilla, Pablo; Ojeda-Aravena, Alex; Pardo-Tamayo, Carolina; Zapata-Huenullán, Carolina; Cofre-Bolados, Cristián; Sanchez-Ramirez, Celso
    This study investigated the relationship between peak oxygen uptake and ventilatory threshold 1 (VT1) and 2 (VT2) with the Special Wrestling Fitness Test variables. Thirteen wrestlers (male: six; female: seven) of Olympic freestyle wrestling were assessed. The Pearson’s correlation coefficient (p < 0.05) was used to establish the relationship between variables. A positive correlation was found between VT1 with throws in set B (r = 0.77; p = 0.002; 95%CI = 0.37–0.93), total throws (r = 0.73; p = 0.004; 95%CI = 0.30–0.91), heart rate recovery (r = 0.58; p = 0.036; 95%CI = 0.05–0.86), and test index (r = −0.60; p = 0.031; 95%CI = −0.86–0.07); between VT2 and throws in set B (r = 0.57; p = 0.043; 95%CI = 0.01–0.86); and between peak oxygen uptake with throws in set B (r = 0.77; p = 0.002; 95%CI = 0.39–0.93), throws in set C (r = 0.64; p = 0.02; 95%CI = 0.12–0.89), and total throws (r = 0.72; p = 0.006; 95%CI = 0.28–0.91). In conclusion, the peak oxygen uptake and ventilatory thresholds correlated with specific Special Wrestling Fitness Test variables.