TY - JOUR
T1 - Muscle stiffness of the rectus femoris and vastus lateralis in children with Osgood–Schlatter disease
AU - Enomoto, Shota
AU - Oda, Toshiaki
AU - Sugisaki, Norihide
AU - Toeda, Misaki
AU - Kurokawa, Sadao
AU - Kaga, Masaru
N1 - Funding Information:
The authors acknowledge the help of Aiko Tsushima, Ayano Wada, Haruna Yokoyama, Kenta Yoshimura, Kota Miyake, Masakazu Matsueda, Nana Kojima, Nao Naya, Ryota Tanaka, Ryotaro Konya, Satsuki Uemura, Shungo Nakayama, Takashi Hoshishima, Takeshi Omori, Yuta Ishii, and Yuya Kobashi in the experiments. The authors thank them and all subjects who participated in this study. We would like to thank Editage (www.editage.jp) for English language editing.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/10
Y1 - 2021/10
N2 - Background: The relevance of the mechanical properties of muscles in relation to Osgood–Schlatter disease (OSD) remains unclear. The present study aimed to examine rectus femoris (RF) and vastus lateralis (VL) muscle stiffness in children with OSD. Methods: A total of 28 legs affected by OSD and 26 legs without OSD were assessed. The shear-wave velocity (SWV) of the RF and VL (in m/s) during passive knee flexion (0° (i.e., fully extended position), 45°, and 90° knee joint flexion) and isometric contraction (50% of maximal voluntary contraction) was measured using shear-wave elastography. Results: The SWV of the RF was higher in subjects with OSD than in those without OSD at 45° and 90° flexion (P = 0.033 and P = 0.035, respectively); however, the SWV of the RF did not significantly differ at 0° flexion (P = 0.469). Similarly, the SWV of the VL exhibited no significant difference between the tested groups (P > 0.05). No significant difference in the SWV of both muscles during isometric contraction was observed between the two groups (P > 0.05). Conclusions: The results suggest that a stiffer RF under stretched conditions (45° and 90° flexion) is related to the presence of OSD. Furthermore, both muscles under unstretched and contracted conditions and the VL under stretched conditions have limited association with the presence of OSD. These results have important implications for understanding the association between the mechanical properties of muscles and OSD.
AB - Background: The relevance of the mechanical properties of muscles in relation to Osgood–Schlatter disease (OSD) remains unclear. The present study aimed to examine rectus femoris (RF) and vastus lateralis (VL) muscle stiffness in children with OSD. Methods: A total of 28 legs affected by OSD and 26 legs without OSD were assessed. The shear-wave velocity (SWV) of the RF and VL (in m/s) during passive knee flexion (0° (i.e., fully extended position), 45°, and 90° knee joint flexion) and isometric contraction (50% of maximal voluntary contraction) was measured using shear-wave elastography. Results: The SWV of the RF was higher in subjects with OSD than in those without OSD at 45° and 90° flexion (P = 0.033 and P = 0.035, respectively); however, the SWV of the RF did not significantly differ at 0° flexion (P = 0.469). Similarly, the SWV of the VL exhibited no significant difference between the tested groups (P > 0.05). No significant difference in the SWV of both muscles during isometric contraction was observed between the two groups (P > 0.05). Conclusions: The results suggest that a stiffer RF under stretched conditions (45° and 90° flexion) is related to the presence of OSD. Furthermore, both muscles under unstretched and contracted conditions and the VL under stretched conditions have limited association with the presence of OSD. These results have important implications for understanding the association between the mechanical properties of muscles and OSD.
KW - Associated factor
KW - Elastography
KW - Quadriceps femoris
KW - Tibial tuberosity
KW - Ultrasound
UR - http://www.scopus.com/inward/record.url?scp=85114788770&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85114788770&partnerID=8YFLogxK
U2 - 10.1016/j.knee.2021.08.001
DO - 10.1016/j.knee.2021.08.001
M3 - Article
C2 - 34507092
AN - SCOPUS:85114788770
VL - 32
SP - 140
EP - 147
JO - Knee
JF - Knee
SN - 0968-0160
ER -