Banca de DEFESA: RAONY ESPÍNDOLA MOURA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : RAONY ESPÍNDOLA MOURA
DATE: 21/03/2024
TIME: 14:00
LOCAL: Sala 01 - PPGEF
TITLE:

BAR SPEED MONITORING TO QUANTIFY THE FATIGUE IN RESISTANCE TRAINING: DO LOAD MAGNITUDE AND SPEED VARIABLES AFFECT SENSITIVITY?

KEY WORDS:

velocity-based training; strength training; neuromuscular fatigue 

PAGES: 49
BIG AREA: Ciências da Saúde
AREA: Educação Física
SUMMARY:

This study compared the effects of load magnitude and bar velocity variables on neuromuscular
fatigue sensitivity in resistance training. Seventeen resistance-trained men (age = 25.7 ± 4.9
years; height = 177.0 ± 7.2 cm; body mass = 77.7 ± 12.3 kg; back-squat 1RM = 145.0 ± 33.9
kg) participated in the study. Neuromuscular performance was assessed pre and post (+5 min
and +20 min) resistance exercise through the countermovement jump (CMJ) and maximum
concentric velocity (MCV) in the back-squat at 40%, 60%, and 80% 1RM. Pre- and post-
exercise changes in mean propulsive velocity (MPV) and peak velocity (PV) in the back-squat
at different intensities were compared with variations in CMJ height. CMJ height decreased
significantly from pre- to post-exercise (∆%= -7.5 to -10.4; p<0.01; ES=0.37 to 0.60). Bar
velocity (MPV and PV) also decreased significantly across all load intensities (∆%= -4.0 to -
12.5; p<0.01; ES=0.32 to 0.66). The decrease in performance was similar between the CMJ,
MPV (40% and 80% 1RM; p=1.00), and PV (80% 1RM; p=1.00). The CMJ identified a higher
decrease in post-exercise performance compared to MPV (60% 1RM; p=0.05) and PV (40%
and 60% 1RM; p<0.01). Low systematic bias and acceptable levels of agreement between CMJ
and bar velocity were found only using MPV at 40% and 80% 1RM (bias = 0.35 to 1.59; ICC
= 0.51 to 0.71; CV = 5.1% to 8.5%). Our results suggest that using the MPV at 40% or 80%
1RM to monitor fatigue through changes in bar velocity promotes optimal sensitivity.

COMMITTEE MEMBERS:
Externo à Instituição - ANDERSON SANTIAGO TEIXEIRA - UFSC
Interno - ***.245.206-** - FABIANO DE SOUZA FONSECA - UFRPE
Interno - 1061802 - RAFAEL DOS SANTOS HENRIQUE