Banca de DEFESA: MATHEUS ALCÂNTARA DE MEDEIROS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MATHEUS ALCÂNTARA DE MEDEIROS
DATE: 12/12/2022
TIME: 14:00
LOCAL: Sala VIRTUAL MEET
TITLE:

EFFECTS OF GLUTEUS MAXIMUM PRE-EXHAUSTION BEFORE THE FREE SQUAT SERIES.

KEY WORDS:

Strength training; Pre-exhaustion; Specialized training techniques; Time under tension; Muscle swelling; Delayed onset muscle pain.

PAGES: 60
BIG AREA: Ciências da Saúde
AREA: Educação Física
SUMMARY:

Pre-exhaustion (PE) can be defined as an advanced method of strength training, in which two or more exercises are performed successively, in an almost uninterrupted sequence. The performance of compound exercises, in which more than one muscle group is demanded, can be limited by the momentary failure of the weakest muscle involved in the movement, resulting in the underutilization of the other muscle structures. In these circumstances, as a compensation strategy, the target muscle could be previously exhausted with the execution of isolated exercises. The objective of this work was to compare the acute effects of the Pre-exhaustion method with a traditional RT protocol, on muscle responses, blood lactate and post-session recovery obtained in an exercise session. For that, 16 volunteers - 8 men and 8 women - experienced RT (26.13 ± 5.08 and 29.00 ± 5.55 years; 79.75 ± 12.18 and 66.15 ± 7.51 kg; 1.75 ± 0.55 and 1.61 ± 0.55 m; experience in ST: 6.37 ± 4.40 and 4.10 ± 3.56 years; respectively) underwent two exercise protocols in randomized order and separated by a week of rest. The traditional protocol consisted of 5 sets of free squats; the PE protocol was composed of 5 sets of pelvic lifts prior to the free squat sets (<10 s). Both protocols were performed until momentary muscle failure, with a 3-minute rest interval between sets. In both protocols, a cadence of 1 second was used for the concentric phase, and 2 seconds for the eccentric phase of the exercise, with no pause between the ascending and descending movements. The load used to perform the PE was set at 50% of 1RM for both exercises. For the traditional protocol, 75% of 1RM was used. Before the exercise sessions, measurements were taken of the thickness of the rectus femoris, vastus intermedius, vastus lateralis, vastus medialis - 2 portions of each - and gluteus maximus - 1 portion, algometry in the rectus femoris, vastus medialis, vastus lateralis and gluteus muscles. maximum, blood lactate and quality of recovery. During the exercise sessions, the number of repetitions, time under tension, total volume and RPE of each series were quantified. Soon after the session, measurements of muscle thickness and blood lactate were evaluated. on the days following the exercise sessions (24, 48 and 72 hours later), muscle thickness, algometry and quality of recovery were again evaluated; and, also evaluated the perceived pain. Both protocols promoted an increase in the assessed muscle thickness; however, the PE protocol led to a significant increase in the thickness of the GM immediately after the intervention, an increase that remained during the subsequent days, when compared to the traditional protocol. The GM resulted in a higher probability of failure obtained when performing the PE; while performing the traditional protocol, the quadriceps resulted in a higher probability of failure. You
blood lactate levels were higher for the PE protocol. The VTT was superior in the PE session together with the highest number of repetitions; on the other hand, when comparing only the VTT of the multi-joint exercise between protocols, the VTT was higher in the traditional session, as well as the number of repetitions performed per series. The time under tension was longer in the first and second series when the PE protocol was performed. Both protocols resulted in a reduction in the delayed pain threshold; however, the PE protocol resulted in a greater decrease in the threshold for the GM and the traditional protocol for the vastus medialis and lateralis – with no difference for the RF. The total quality of recovery, while not promoting a statistical difference between the protocols, promoted a difference between the pre-intervention moment, not returning to baseline values. The use of the GM PE method tends to increase the demand on the GM muscle during the performance of the free squat, even when performed at a lower intensity.

COMMITTEE MEMBERS:
Presidente - 2626634 - PAULO MOREIRA SILVA DANTAS
Interno - 1793257 - ARNALDO LUIS MORTATTI
Interno - 2627140 - BRENO GUILHERME DE ARAUJO TINOCO CABRAL
Externo à Instituição - JONATO PRESTES - UCB
Externo à Instituição - THIAGO BARBOSA TRINDADE