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This study aimed to analyze the effect of plyometric training (PT) at different frequencies on jump performance, running sprint speed, and service speed in youth male volleyball players. The participants were randomly assigned to one PT session per week (Experimental Group 1, EG1, n = 15), two PT sessions per week (Experimental Group 2, EG2, n = 14), and a control group (CG, n = 13). The total weekly jumping ranged between 98 and 196 jumps (equalized between, EG1 and, EG2). The assessments performed were squat jump (SJ), countermovement jump (CMJ), CMJ-arms, drop jump (DJ), 5-m sprint, 10-m sprint, and service speed. The intragroup comparisons showed that, EG1 significantly ( p < 0.001) improved SJ ( Δ = 12.74%; d = 1.30), CMJ ( Δ = 11.94%; d = 1.71), CMJ-arms ( Δ = 12.02%; d = 1.47), DJ ( Δ = 10.93%; d = 1.30), 5-m sprint ( Δ = -4.61%; d = 0.29), 10-m sprint ( Δ = -3.95%; d = 0.40) and service speed ( Δ = 8.17%; d = 1.53). Similarly, EG2 significantly ( p ˂ 0.001) improved SJ ( Δ = 11.52%; d = 1.25), CMJ ( Δ = 11.29%; d = 1.38), CMJ-arms ( Δ = 11.42%; d = 1.26), DJ ( Δ = 13.90%; d = 2.17), 5-m sprint ( Δ = -3.85%; d = 0.25), 10-m sprint ( Δ = -2.73%; d = 0.25) and service speed ( Δ = 6.77%; d = 1.44). The CG significantly ( p < 0.05) improved SJ ( Δ = 2.68; d = 0.28), CMJ-arms ( Δ = 2.30; d = 0.35), 5-m sprint ( Δ = -1.27; d = 0.10) and service speed ( Δ = 1.42; d = 0.30). Intergroup comparisons revealed significantly greater improvements in all variables ( p < 0.001) in, EG1 and, EG2 concerning to CG. However, no significant differences were found between, EG1 and, EG2. A moderate weekly PT volume, distributed in one or two sessions per week, seems equally effective., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Hernandez-Martinez, Guzman-Muñoz, Ramirez-Campillo, Herrera-Valenzuela, Magnani Branco, Avila-Valencia, Luis Carter-Beltran, Aravena-Sagardia, Méndez-Cornejo and Valdés-Badilla.)

Introduction: The sequelae post-COVID can affect different systems. In this sense, considering the multi-factorial etiology of COVID-19, multi-professional interventions could be a relevant strategy for recovery health indicators. Objective: This study aimed to investigate the effects of multi-professional intervention on body composition, physical fitness, and biomarkers in overweight COVID-19 survivors with different symptomatology. Methodology: A non-randomized parallel group intervention included 69 volunteers (BMI ≥25 kg/m 2 ), divided into three groups according to SARS CoV-2 symptomatology, but only 35 finished the longitudinal protocol [control group ( n = 11); moderate group ( n = 17) and severe group ( n = 7)]. The groups were submitted to a multi-professional program (nutritional intervention, psychoeducation, and physical exercise intervention) for 8 weeks, and the volunteers underwent body composition assessments (primary outcome) and physical and biochemical tests (secondary outcome) in pre- and post-intervention. This study was registered on the Clinical Trials Registration Platform number: RBR-4mxg57b and with the local research ethics committee protocol under number: 4,546,726/2021. Results: After the 8-week multi-professional intervention, the following results were observed for the moderate COVID-19 group: improved dynamic strength of lower- and ( p = 0.003), upper-limbs ( p = 0.008), maximal isometric lumbar-traction strength ( p = 0.04), flexibility ( p = 0.0006), and albumin ( p = 0.0005), as well as a reduction in the C reactive protein (CRP) ( p = 0.003) and fasting glucose ( p = 0.001); for the severe COVID-19 group: an improvement in dynamic lower-body strength ( p = 0.001), higher values of albumin ( p = 0.005) and HDL-c ( p = 0.002), and lower values of CRP ( p = 0.05), and for the control group: an improvement in sit-up repetitions ( p = 0.008), and a reduction of CRP ( p = 0.01), fasting glucose ( p = 0.001) and total cholesterol ( p = 0.04) were identified. All experimental groups reduced triglycerides after intervention ( p < 0.05). Conclusion: Finally, 8 weeks of multiprofessional intervention can be an efficient tool for reversing the inflammatory process and promoting improvements in daily activities and quality of life, although it is believed that the severe COVID-19 group needs longer interventions to improve different health indicators. Clinical Trial Registration: https://ensaiosclinicos.gov.br/, identifier: RBR-4mxg57b., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Sordi, Lemos, de Souza Marques, Ryal, Priscila de Paula Silva Lalucci, Marques, Amaro Camilo, De Paula Ramos, Franzói De Moraes, Valdés-Badilla, Mota and Magnani Branco.)

The present study aimed to evaluate the body composition and cardiorespiratory fitness of overweight or obese people after COVID-19. 171 volunteers of both sexes (men, n = 93 and women, n = 78) between 19 and 65 years old were allocated into three groups according to the severity of their symptoms of COVID-19: non-hospitalized people/mild symptoms ( n = 61), hospitalized ( n = 58), and hospitalized in an intensive care unit-ICU ( n = 52). Two laboratory visits were carried out 24 h apart. First, a medical consultation was carried out, with subsequent measurement of body weight and height (calculation of body mass index) and body composition assessment via electrical bioimpedance. After 24 h, a cardiorespiratory test was performed using the Bruce protocol, with a direct gas exchange analysis. Hospitalized individuals had significantly higher values for fat mass and body fat percentage than non-hospitalized individuals ( p < 0.05). Significantly higher values were found for heart rate (HR) and peak oxygen consumption (VO 2 peak) for individuals who were not hospitalized when compared to those hospitalized in the ICU ( p < 0.05). Significantly higher values for distance, ventilation, and the relationship between respiratory quotient were found for non-hospitalized individuals compared to hospitalized individuals and those in the ICU ( p < 0.05). After the cardiorespiratory test, higher values for peripheral oxygen saturation (SpO 2 ) were observed for non-hospitalized individuals than for all hospitalized individuals ( p < 0.05). Diastolic blood pressure was significantly higher at the tenth and fifteenth minute post-Bruce test in hospitalized than in non-hospitalized participants ( p < 0.05). Based on these results, proposals for cardiopulmonary rehabilitation are indispensable for hospitalized groups considering the responses of blood pressure. Monitoring HR, SpO 2, and blood pressure are necessary during rehabilitation to avoid possible physical complications. Volume and intensity of exercise prescription should respect the physiologic adaptation. Given lower physical conditioning among all the groups, proposals for recovering from health conditions are urgent and indispensable for COVID-19 survivors., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2022 Lemos, Cavalini, Pugliese Henrique, Perli, de Moraes Marchiori, Marchiori, Sordi, Franzói de Moraes, de Paula Ramos, Valdés-Badilla, Mota and Magnani Branco.)

Purpose: The present study investigated the effects of high-intensity intermittent training (HIIT) on lower- and upper-body graded exercise and high-intensity intermittent exercise (HIIE, four Wingate bouts) performance, and on physiological and muscle damage markers responses in judo athletes., Methods: Thirty-five subjects were randomly allocated to a control group (n = 8) or to one of the following HIIT groups (n = 9 for each) and tested pre- and post-four weeks (2 training d·wk(-1)): (1) lower-body cycle-ergometer; (2) upper-body cycle-ergometer; (3) uchi-komi (judo technique entrance). All HIIT were constituted by two blocks of 10 sets of 20 s of all out effort interspersed by 10 s set intervals and 5-min between blocks., Results: For the upper-body group there was an increase in maximal aerobic power in graded upper-body exercise test (12.3%). The lower-body group increased power at onset blood lactate in graded upper-body exercise test (22.1%). The uchi-komi group increased peak power in upper- (16.7%) and lower-body (8.5%), while the lower-body group increased lower-body mean power (14.2%) during the HIIE. There was a decrease in the delta blood lactate for the uchi-komi training group and in the third and fourth bouts for the upper-body training group. Training induced testosterone-cortisol ratio increased in the lower-body HIIE for the lower-body (14.9%) and uchi-komi (61.4%) training groups., Conclusion: Thus, short-duration low-volume HIIT added to regular judo training was able to increase upper-body aerobic power, lower- and upper-body HIIE performance.