Impact of moment arm on torque production of the knee extensors in children
Abstract The joint moment arm (MA) dimension is related to joint torque in adults. However, this relationship remains unexplored in children. In this study, we aimed to determine the relationship between MA and joint torque of the knee extensors in this young population. The quadriceps femoris muscl...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-09-01
|
| Series: | Physiological Reports |
| Subjects: | |
| Online Access: | https://doi.org/10.14814/phy2.14521 |
| _version_ | 1819058160081567744 |
|---|---|
| author | Nobuaki Tottori Tadashi Suga Miyuki Hori Tadao Isaka Satoshi Fujita |
| author_facet | Nobuaki Tottori Tadashi Suga Miyuki Hori Tadao Isaka Satoshi Fujita |
| author_sort | Nobuaki Tottori |
| collection | DOAJ |
| description | Abstract The joint moment arm (MA) dimension is related to joint torque in adults. However, this relationship remains unexplored in children. In this study, we aimed to determine the relationship between MA and joint torque of the knee extensors in this young population. The quadriceps femoris muscle volume (MV) and knee extensor MA in 20 preadolescent boys (age: 10.7 ± 0.9 years) were measured using magnetic resonance imaging. The knee extensor isometric and isokinetic torques were measured using a dynamometer. The isokinetic torque measurements were performed using slow and fast angular velocities at 60°/s and 180°/s respectively. The knee extensor torque‐producing capacities were assessed as the knee extensor isometric or isokinetic torque per the quadriceps femoris MV. The quadriceps femoris MV correlated significantly with all three knee extensor isometric and isokinetic torques (r = 0.513–0.804, p < .05 for all). The knee extensor MA also correlated significantly with the three knee extensor isometric and isokinetic torques (r = 0.701–0.806, p ≤ .001 for all). Furthermore, the knee extensor MA correlated significantly with all three knee extensor torque‐producing capacities (r = 0.488–0.701, p < .05 for all). These findings suggest that in addition to adults, greater MA plays an important role in achieving higher joint torque production of the knee extensors in preadolescent boys. This study is the first to determine the impact of MA dimension on joint torque production in children. |
| first_indexed | 2024-12-21T13:50:47Z |
| format | Article |
| id | doaj.art-99fb8a8f628d4f52bff30d14dc702aff |
| institution | Directory Open Access Journal |
| issn | 2051-817X |
| language | English |
| last_indexed | 2024-12-21T13:50:47Z |
| publishDate | 2020-09-01 |
| publisher | Wiley |
| record_format | Article |
| series | Physiological Reports |
| spelling | doaj.art-99fb8a8f628d4f52bff30d14dc702aff2022-12-21T19:01:42ZengWileyPhysiological Reports2051-817X2020-09-01817n/an/a10.14814/phy2.14521Impact of moment arm on torque production of the knee extensors in childrenNobuaki Tottori0Tadashi Suga1Miyuki Hori2Tadao Isaka3Satoshi Fujita4Faculty of Sport and Health Science Ritsumeikan University Kusatsu JapanFaculty of Sport and Health Science Ritsumeikan University Kusatsu JapanFaculty of Sport and Health Science Ritsumeikan University Kusatsu JapanFaculty of Sport and Health Science Ritsumeikan University Kusatsu JapanFaculty of Sport and Health Science Ritsumeikan University Kusatsu JapanAbstract The joint moment arm (MA) dimension is related to joint torque in adults. However, this relationship remains unexplored in children. In this study, we aimed to determine the relationship between MA and joint torque of the knee extensors in this young population. The quadriceps femoris muscle volume (MV) and knee extensor MA in 20 preadolescent boys (age: 10.7 ± 0.9 years) were measured using magnetic resonance imaging. The knee extensor isometric and isokinetic torques were measured using a dynamometer. The isokinetic torque measurements were performed using slow and fast angular velocities at 60°/s and 180°/s respectively. The knee extensor torque‐producing capacities were assessed as the knee extensor isometric or isokinetic torque per the quadriceps femoris MV. The quadriceps femoris MV correlated significantly with all three knee extensor isometric and isokinetic torques (r = 0.513–0.804, p < .05 for all). The knee extensor MA also correlated significantly with the three knee extensor isometric and isokinetic torques (r = 0.701–0.806, p ≤ .001 for all). Furthermore, the knee extensor MA correlated significantly with all three knee extensor torque‐producing capacities (r = 0.488–0.701, p < .05 for all). These findings suggest that in addition to adults, greater MA plays an important role in achieving higher joint torque production of the knee extensors in preadolescent boys. This study is the first to determine the impact of MA dimension on joint torque production in children.https://doi.org/10.14814/phy2.14521isometric/isokinetic torquemagnetic resonance imagingquadriceps femoris muscle volumetorque‐producing capacity |
| spellingShingle | Nobuaki Tottori Tadashi Suga Miyuki Hori Tadao Isaka Satoshi Fujita Impact of moment arm on torque production of the knee extensors in children Physiological Reports isometric/isokinetic torque magnetic resonance imaging quadriceps femoris muscle volume torque‐producing capacity |
| title | Impact of moment arm on torque production of the knee extensors in children |
| title_full | Impact of moment arm on torque production of the knee extensors in children |
| title_fullStr | Impact of moment arm on torque production of the knee extensors in children |
| title_full_unstemmed | Impact of moment arm on torque production of the knee extensors in children |
| title_short | Impact of moment arm on torque production of the knee extensors in children |
| title_sort | impact of moment arm on torque production of the knee extensors in children |
| topic | isometric/isokinetic torque magnetic resonance imaging quadriceps femoris muscle volume torque‐producing capacity |
| url | https://doi.org/10.14814/phy2.14521 |
| work_keys_str_mv | AT nobuakitottori impactofmomentarmontorqueproductionofthekneeextensorsinchildren AT tadashisuga impactofmomentarmontorqueproductionofthekneeextensorsinchildren AT miyukihori impactofmomentarmontorqueproductionofthekneeextensorsinchildren AT tadaoisaka impactofmomentarmontorqueproductionofthekneeextensorsinchildren AT satoshifujita impactofmomentarmontorqueproductionofthekneeextensorsinchildren |