Hamstrings passive and active shear modulus: Implications of conventional static stretching and warmup.
J Sci Med Sport
; 27(6): 415-421, 2024 Jun.
Article
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| MEDLINE
| ID: mdl-38448345
ABSTRACT
PURPOSE:
This study compares the acute effects of a static stretching and a warmup protocol on the active and passive shear modulus of the hamstring muscles.METHODS:
Muscle shear modulus was assessed at rest and during isometric contractions at 20â¯% of maximal voluntary isometric contraction (MVIC).RESULTS:
After stretching, the passive shear modulus pattern was not altered, while at 20â¯% MVIC the biceps femoris short head (BFsh) and semimembranosus showed a shear modulus increase and decrease, respectively, which resulted on BFsh-SM pair differences (pre 3.8⯱â¯16.8 vs. post 39.3⯱â¯25.1â¯kPa; pâ¯<â¯0.001; dâ¯=â¯1.66) which was accompanied by a decrease of 18.3â¯% on MVIC. Following the warmup protocol, passive shear modulus remained unchanged, while active shear modulus was decreased for the semitendinosus (pre 65.3⯱â¯13.5 vs. post 60.3⯱â¯12.3â¯kPa; pâ¯=â¯0.035; dâ¯=â¯0.4). However, this difference was within the standard error of measurement (10.54â¯kPa), and did not impact the force production, since it increased only 1.4â¯% after the warmup.CONCLUSIONS:
The results of this study suggest that the passive and active shear modulus responses of the individual hamstring muscles to static stretching are muscle-specific and that passive and active hamstring shear modulus are not changed by a standard warmup intervention.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Ejercicios de Estiramiento Muscular
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Ejercicio de Calentamiento
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Músculos Isquiosurales
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Contracción Isométrica
Límite:
Adult
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Humans
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Male
Idioma:
En
Revista:
J Sci Med Sport
Asunto de la revista:
MEDICINA ESPORTIVA
Año:
2024
Tipo del documento:
Article