Banca de DEFESA: ELDA SILVA AUGUSTO DE ANDRADE

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ELDA SILVA AUGUSTO DE ANDRADE
DATE: 29/03/2023
TIME: 14:00
LOCAL: GOOGLE MEET
TITLE:

KEY WORDS:

Função neuromuscular, Fadiga muscular; Fadiga, treinamento.

PAGES: 55
BIG AREA: Ciências da Saúde
AREA: Nutrição
SUMMARY:

High-intensity interval exercise (EIAI) is an exercise widely used to improve physical fitness. The EIAI prescription consists of manipulating different variables, intensity, duration of effort and type of recovery. Particularly, the amplitude of the recovery duration may affect the physiological responses during the AIIE, however, the effect of the amplitude of the recovery duration on the development of performance fatigability has not yet been investigated. The present study investigated the effect of the amplitude of recovery duration on the development of exercise-induced neuromuscular fatigue during an AIIE session. In this randomized crossover trial, twelve physically active men (mean ± SD) age 24.75 ± 3.79 SD years; height 1.77 ± xx 0.06 m; body mass 80.66 ± 10.22 kg; VO2max. 2.26 ± 1.19 mL/kg/min; and peak power 239 ± 14.99 W, they performed two AIIE sessions with different recovery amplitudes, 1 - AIAI with reduced recovery amplitude (4 x 4min at 90% HR, 2min recovery at 50% HRmax 4 x 4 min ) It is; 2 – EIAIL with long recovery amplitude (4 x 4min at 90% HR, 3min recovery at 50% HRmax. Immediately before and 30 s after the exercise, participants performed a countermovement jump (CMS) to assess neuromuscular function. A Heart rate (HR), oxygen consumption (VO2max), peripheral oxygen saturation (SaO2 and Subjective Perceived Exertion (RPE) were continuously monitored during AIIE. Venous lactate and pH were measured immediately before and two minutes after exercise. Performance fatigability was measured via pre- and post-exercise changes in jump height, flight time, exit velocity, strength, and power of vertical jumps. Pre- and post-EIAI declines in height, speed, power and time of flight of the SCM were higher in the EIAIR (p < 0.05), while the strength of the SCM was similar between the protocols (EIAIR: 12 ± 3, 6 ± 10, 11 ± 5, 6 ± 10 and 6 ± 1%; EIAIL: 6 ± 10, 3 ± 8, 6 ± 5, 3 ± 9 and 6 ± 2%). When using the EIAIL and EIAIR protocols, there was an increase from pre to post exercise in both protocols of plasma lactate and a reduction in blood pH (p<0.05). There was an increase in HR, V ̇ O2 and RPE from the first to the last effort in both protocols, and a reduction in SpO2 (p < 0.05), with this reduction being greater in the EIARI (p < 0.005). The findings of this study suggest that reducing recovery range increases physiological, perceptual, and metabolic stress during exercise, which may lead to greater performance fatigability.

COMMITTEE MEMBERS:
Externo ao Programa - 1466012 - ARY GOMES FILHO - nullPresidente - ***.225.596-** - GUILHERME ASSUNCAO FERREIRA - UFPE
Externo ao Programa - 1061802 - RAFAEL DOS SANTOS HENRIQUE - null