TY - GEN
T1 - Electromyography Analysis of Rectus Femoris and Biceps Femoris Muscles Activation in Adults with Achondroplasia
AU - Alves, Inês
AU - Castro, Maria António
AU - Tavares, Sofia
AU - Fernandes, Orlando
N1 - Publisher Copyright:
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2023.
PY - 2023
Y1 - 2023
N2 - Background. Achondroplasia is a genetic rare condition characterized by shorter stature and disproportionate upper and lower limb length. This study aimed to investigate the activation of lower limb agonist–antagonist knee muscles, Rectus femoris and Biceps femoris, in adults with achondroplasia during the squat, through surface electromyography (sEMG) signals. Methods. Eight participants, four women (45.8 ± 15.9 years old) and four men (39.8 ± 14.9 years old) executed three isometric maximum voluntary contractions (iMVC) applying Surface Electromyography for the Non-Invasive Assessment of Muscles (SENIAM) standard recommended tests for these muscles. The sEMG signals were recorded for 30 s while executing the squat movement, including the contraction and relaxation phases. Results. Rectus femoris presented higher activation in men compared to women with achondroplasia, while Biceps femoris was more activated in women. In both men and women, coactivation of these muscles occurred during the squat. Conclusion. In adults with achondroplasia, Rectus femoris and Biceps femoris muscles act synergistically while performing the squat, with coactivation.
AB - Background. Achondroplasia is a genetic rare condition characterized by shorter stature and disproportionate upper and lower limb length. This study aimed to investigate the activation of lower limb agonist–antagonist knee muscles, Rectus femoris and Biceps femoris, in adults with achondroplasia during the squat, through surface electromyography (sEMG) signals. Methods. Eight participants, four women (45.8 ± 15.9 years old) and four men (39.8 ± 14.9 years old) executed three isometric maximum voluntary contractions (iMVC) applying Surface Electromyography for the Non-Invasive Assessment of Muscles (SENIAM) standard recommended tests for these muscles. The sEMG signals were recorded for 30 s while executing the squat movement, including the contraction and relaxation phases. Results. Rectus femoris presented higher activation in men compared to women with achondroplasia, while Biceps femoris was more activated in women. In both men and women, coactivation of these muscles occurred during the squat. Conclusion. In adults with achondroplasia, Rectus femoris and Biceps femoris muscles act synergistically while performing the squat, with coactivation.
KW - Coactivation
KW - Maximum voluntary contraction
KW - Skeletal dysplasia
KW - Squat
UR - https://www.scopus.com/pages/publications/85187673044
U2 - 10.1007/978-3-031-47790-4_17
DO - 10.1007/978-3-031-47790-4_17
M3 - Conference contribution
AN - SCOPUS:85187673044
SN - 9783031477898
T3 - Lecture Notes in Bioengineering
SP - 177
EP - 185
BT - Proceedings of the 10th Congress of the Portuguese Society of Biomechanics, CNB 2023
A2 - Martins Amaro, Ana
A2 - Roseiro, Luis
A2 - Messias, Ana Lúcia
A2 - Gomes, Beatriz
A2 - Almeida, Henrique
A2 - António Castro, Maria
A2 - António Castro, Maria
A2 - Neto, Maria Augusta
A2 - de Fátima Paulino, Maria
A2 - Maranha, Vítor
PB - Springer Science and Business Media Deutschland GmbH
T2 - 10th Congress of the Portuguese Society of Biomechanics, CNB 2023
Y2 - 5 May 2023 through 6 May 2023
ER -