Acceleration Profiles and the Isoinertial Squatting Exercise: Is There a Direct Effect on Concentric-Eccentric Force, Power, and Neuromuscular Efficiency?
J Sport Rehabil
; 30(4): 646-652, 2021 Dec 30.
Article
em En
| MEDLINE
| ID: mdl-33378739
ABSTRACT
OBJECTIVE:
To examine the selective influences of distinct acceleration profiles on the neuromuscular efficiency, force, and power during concentric and eccentric phases of isoinertial squatting exercise.DESIGN:
Cross-sectional study.SETTING:
Biomechanics laboratory of the university.PARTICIPANTS:
A total of 38 active adults were divided according to their acceleration profiles higher (n = 17; >2.5 m/s2) and lower acceleration group (n = 21; <2.5 m/s2). INTERVENTION All subjects performed squats until failure attached to an isoinertial conic pulley device monitored by surface electromyography of rectus femoris, vastus medialis, vastus lateralis, biceps femoris, and semitendinosus. MAIN OUTCOMEMEASURES:
An incremental optical encoder was used to assess maximal and mean power and force during concentric and eccentric phases. The neuromuscular efficiency was calculated using the mean force and the electromyographic linear envelope.RESULTS:
Between-group differences were observed for the maximal and mean force (Prange = .001-.005), power (P = .001), and neuromuscular efficiency (Prange = .001-.03) with higher significant values for the higher acceleration group in both concentric and eccentric phases.CONCLUSION:
Distinct acceleration profiles affect the neuromuscular efficiency, force, and power during concentric and eccentric phases of isoinertial squatting exercise. To ensure immediate higher levels of power and force output without depriving the neuromuscular system, acceleration profiles higher than 2.5 m/s2 are preferable. The acceleration profiles could be an alternative to evolve the isoinertial exercise.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Exercício Físico
/
Músculo Quadríceps
Tipo de estudo:
Observational_studies
/
Prevalence_studies
/
Risk_factors_studies
Limite:
Adult
/
Humans
Idioma:
En
Revista:
J Sport Rehabil
Assunto da revista:
MEDICINA ESPORTIVA
/
REABILITACAO
Ano de publicação:
2021
Tipo de documento:
Article