Lumbar Intervertebral Disc Degeneration Does Not Affect Muscle Synergy for Rowing Activities
Rowers with disc degeneration may have motor control dysfunction during rowing. This study is aimed at clarifying the trunk and lower extremity muscle synergy during rowing and at comparing the muscle synergy between elite rowers with and without lumbar intervertebral disc degeneration. Twelve elite...
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Wiley
2021-01-01
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| Series: | Applied Bionics and Biomechanics |
| Online Access: | http://dx.doi.org/10.1155/2021/6651671 |
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| author | Chie Sekine Naoto Matsunaga Yu Okubo Mika Hangai Koji Kaneoka |
| author_facet | Chie Sekine Naoto Matsunaga Yu Okubo Mika Hangai Koji Kaneoka |
| author_sort | Chie Sekine |
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| description | Rowers with disc degeneration may have motor control dysfunction during rowing. This study is aimed at clarifying the trunk and lower extremity muscle synergy during rowing and at comparing the muscle synergy between elite rowers with and without lumbar intervertebral disc degeneration. Twelve elite collegiate rowers (with disc degeneration, n=6; without disc degeneration, n=6) were included in this study. Midline sagittal images obtained by lumbar T2-weighted magnetic resonance imaging were used to evaluate disc degeneration. Participants with one or more degenerated discs were classified into the disc degeneration group. A 2000 m race trial using a rowing ergometer was conducted. Surface electrodes were attached to the right rectus abdominis, external oblique, internal oblique, latissimus dorsi, multifidus, erector spinae, rectus femoris, and biceps femoris. The activity of the muscles was measured during one stroke immediately after 20% and 80% of the rowing trial. Nonnegative matrix factorization was used to extract the muscle synergies from the electromyographic data. To compare the muscle synergies, a scalar product (SP) evaluating synergy coincidence was calculated, and the muscle synergies were considered identical at SP>75%. Both groups had only one module in the 20% and 80% time points of the trial. At the 20% time point of the 2000 m rowing trial, the SP of the module was 99.8%. At the 80% time point, the SP of the module was 99.9%. The SP results indicate that, at 20% and 80% time points, both groups had the same module. The module showed a high contribution in all muscles. The activation coefficients indicated that the module was always highly activated throughout the rowing stroke in both groups. The trunk and lower extremity muscles are mobilized through the rowing stroke and maintain coordination during rowing. There was no difference in the muscle synergy between the rowers with and without lumbar intervertebral disc degeneration. |
| format | Article |
| id | doaj-art-a81903ea79c04b4db2748b033f3f666f |
| institution | Kabale University |
| issn | 1176-2322 1754-2103 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
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| series | Applied Bionics and Biomechanics |
| spelling | doaj-art-a81903ea79c04b4db2748b033f3f666f2025-02-03T01:05:25ZengWileyApplied Bionics and Biomechanics1176-23221754-21032021-01-01202110.1155/2021/66516716651671Lumbar Intervertebral Disc Degeneration Does Not Affect Muscle Synergy for Rowing ActivitiesChie Sekine0Naoto Matsunaga1Yu Okubo2Mika Hangai3Koji Kaneoka4Department of Physical Therapy, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata City, Niigata 950-3198, JapanGeneral Education Core Curriculum Division, Seigakuin University, 1-1 Tosaki, Ageo City, Saitama 362-8585, JapanSchool of Physical Therapy, Faculty of Health and Medical Care, Saitama Medical University, 1397-1 Yamane, Hidaka City, Saitama 350-1241, JapanMedical Center, Japan Institute of Sports Sciences, 3-15-1 Nishigaoka, Kita-ku, Tokyo 115-0056, JapanFaculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa City, Saitama 359-1192, JapanRowers with disc degeneration may have motor control dysfunction during rowing. This study is aimed at clarifying the trunk and lower extremity muscle synergy during rowing and at comparing the muscle synergy between elite rowers with and without lumbar intervertebral disc degeneration. Twelve elite collegiate rowers (with disc degeneration, n=6; without disc degeneration, n=6) were included in this study. Midline sagittal images obtained by lumbar T2-weighted magnetic resonance imaging were used to evaluate disc degeneration. Participants with one or more degenerated discs were classified into the disc degeneration group. A 2000 m race trial using a rowing ergometer was conducted. Surface electrodes were attached to the right rectus abdominis, external oblique, internal oblique, latissimus dorsi, multifidus, erector spinae, rectus femoris, and biceps femoris. The activity of the muscles was measured during one stroke immediately after 20% and 80% of the rowing trial. Nonnegative matrix factorization was used to extract the muscle synergies from the electromyographic data. To compare the muscle synergies, a scalar product (SP) evaluating synergy coincidence was calculated, and the muscle synergies were considered identical at SP>75%. Both groups had only one module in the 20% and 80% time points of the trial. At the 20% time point of the 2000 m rowing trial, the SP of the module was 99.8%. At the 80% time point, the SP of the module was 99.9%. The SP results indicate that, at 20% and 80% time points, both groups had the same module. The module showed a high contribution in all muscles. The activation coefficients indicated that the module was always highly activated throughout the rowing stroke in both groups. The trunk and lower extremity muscles are mobilized through the rowing stroke and maintain coordination during rowing. There was no difference in the muscle synergy between the rowers with and without lumbar intervertebral disc degeneration.http://dx.doi.org/10.1155/2021/6651671 |
| spellingShingle | Chie Sekine Naoto Matsunaga Yu Okubo Mika Hangai Koji Kaneoka Lumbar Intervertebral Disc Degeneration Does Not Affect Muscle Synergy for Rowing Activities Applied Bionics and Biomechanics |
| title | Lumbar Intervertebral Disc Degeneration Does Not Affect Muscle Synergy for Rowing Activities |
| title_full | Lumbar Intervertebral Disc Degeneration Does Not Affect Muscle Synergy for Rowing Activities |
| title_fullStr | Lumbar Intervertebral Disc Degeneration Does Not Affect Muscle Synergy for Rowing Activities |
| title_full_unstemmed | Lumbar Intervertebral Disc Degeneration Does Not Affect Muscle Synergy for Rowing Activities |
| title_short | Lumbar Intervertebral Disc Degeneration Does Not Affect Muscle Synergy for Rowing Activities |
| title_sort | lumbar intervertebral disc degeneration does not affect muscle synergy for rowing activities |
| url | http://dx.doi.org/10.1155/2021/6651671 |
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