TY  - JOUR
AU  - Nóbrega, Sanmy Rocha
A2  - Nóbrega, Sanmy Rocha
A2  - Barroso, Renato
A2  - Ugrinowitsch, Carlos
A2  - Costa, Jean Lucas Fernandes da
A2  - Alvarez, Ieda Fernanda
A2  - Barcelos, Cintia
A2  - Libardi, Cleiton Augusto
DB  - BISp
DP  - BISp
KW  - Elektromyographie
KW  - Krafttraining
KW  - Mann
KW  - Muskelaktivität
KW  - Skelettmuskulatur
KW  - Sportmedizin
KW  - Trainierter
KW  - Trainingsgestaltung
KW  - Trainingswirkung
KW  - Trainingswissenschaft
LA  - eng
TI  - Self-selected vs. fixed repetition duration : effects on number of repetitions and muscle activation in resistance-trained men
TT  - Selbst ausgewählte im Vergleich zu fest vorgegebener Wiederholungsdauer : die Auswirkung auf die Anzahl der Wiederholungen und die Muskelaktivierung krafttrainierter Männer
PY  - 2018
N2  - The aim of this study was to compare the effects of self-selected and fixed repetition duration (RD) on resistance exercise (RE) volume, muscle activation, and time under tension (TUT) per repetition and per session. Twelve resistance-trained men participated in the study. A randomized cross-over design was used and each participant performed 2 high-intensity RE protocols in a balanced order: (a) 3 sets of RE with self-selected RD (SELF); and (b) 3 sets of RE with fixed RD (2-second concentric and 2-second eccentric [FIX]). Muscle activation was assessed through surface electromyography (EMG) of the vastus lateralis and vastus medialis throughout RE sessions. Overall, RE volume was significantly greater for SELF (p = 0.01), whereas TUT per repetition was significantly greater for FIX (p = 0.0001). No significant differences between protocols were detected for TUT per session. Between-protocol comparisons revealed significantly greater EMG amplitude for SELF compared with FIX at S1 (p = 0.01), S2 (p = 0.03), and S3 (p = 0.03). Both SELF and FIX protocols produced significant increases in EMG amplitude from 25 to 100% (p < 0.001) of set completion. Between-protocol comparisons revealed significantly greater EMG amplitude for SELF compared with FIX at 75% (p = 0.03) and 100% (p = 0.01). In conclusion, self-selected RD resulted in greater volume and muscle activation compared with fixed RD in an RE session.
L2  - https://journals.lww.com/nsca-jscr/Abstract/2018/09000/Self_selected_vs__Fixed_Repetition_Duration__.3.aspx
L2  - https://dx.doi.org/10.1519/JSC.0000000000002493
DO  - 10.1519/JSC.0000000000002493
SP  - S. 2419-2424
SN  - 1064-8011
JO  - Journal of strength and conditioning research
IS  - 9
VL  - 32
M3  - Elektronische Ressource (online)
M3  - Gedruckte Ressource
ID  - PU201809006790
ER  -