Ankle Joint Cooling did not but Knee Joint Cooling altered the Quadriceps and Gastrocnemius Neuromuscular Activation During a Single-leg Drop Jump
PURPOSE We examined the immediate effect on ankle or knee joint cooling on the lower-extremity activation during a single-leg drop jump. METHODS Twenty healthy adults randomly completed three data collection sessions (a 20-minute ankle or knee joint cooling, or control). Two wireless surface electro...
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| Format: | Article |
| Language: | Korean |
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The Korean Society of Exercise Physiology
2020-08-01
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| Series: | 운동과학 |
| Subjects: | |
| Online Access: | http://www.ksep-es.org/upload/pdf/es-29-3-225.pdf |
| _version_ | 1818250514500943872 |
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| author | Jihong Park Kyeongtak Song Sae Yong Lee Hohyung Ryu |
| author_facet | Jihong Park Kyeongtak Song Sae Yong Lee Hohyung Ryu |
| author_sort | Jihong Park |
| collection | DOAJ |
| description | PURPOSE We examined the immediate effect on ankle or knee joint cooling on the lower-extremity activation during a single-leg drop jump. METHODS Twenty healthy adults randomly completed three data collection sessions (a 20-minute ankle or knee joint cooling, or control). Two wireless surface electromyography (EMG, 2,000 Hz) electrodes were attached over the vastus medialis (VM) and the medial gastrocnemius (MG) on their right limb. Subjects were asked to drop down from a wooden box (a 30-cm height) on their right foot onto the force platform (2,000 Hz) and then performed an immediate jump as high as they could. Whole EMG signals (normalised by the mean EMG value recorded during a reference position) within the preactivation (100-ms prior to contact) and the ground contact (on the force platform) during the drop jump task were analysed using functional linear models(p=.05, Cohen’s d effect size: ES). RESULTS After knee joint cooling, (1) the VM activation was decreased during the ground contact (6 to 14%, 30 to 45%, 60 to 90% for ES of 0.50, 0.47, and 0.61, respectively) and (2) the MG activation was increased during the preactivation (84- to 29-ms prior to initial contact, ES=1.30) and the ground contact (59 to 100%, ES=1.40). No changes were observed under the condition of ankle joint cooling or control. CONCLUSIONS A 20-minute unilateral knee joint cooling may result in an ipsilateral quadriceps inhibition during a drop jump task. The gastrocnemius appears to increase activation as a compensatory strategy responding to the quadriceps inhibition. The altered neuromuscular activations do not seem to put an individual at risk of injury, resulting from compressive forces in the sagittal plane. |
| first_indexed | 2024-12-12T15:53:36Z |
| format | Article |
| id | doaj.art-915380bd176c413096bfd0424baa3e24 |
| institution | Directory Open Access Journal |
| issn | 1226-1726 2384-0544 |
| language | Korean |
| last_indexed | 2024-12-12T15:53:36Z |
| publishDate | 2020-08-01 |
| publisher | The Korean Society of Exercise Physiology |
| record_format | Article |
| series | 운동과학 |
| spelling | doaj.art-915380bd176c413096bfd0424baa3e242022-12-22T00:19:33ZkorThe Korean Society of Exercise Physiology운동과학1226-17262384-05442020-08-0129322523210.15857/ksep.2020.29.3.225852Ankle Joint Cooling did not but Knee Joint Cooling altered the Quadriceps and Gastrocnemius Neuromuscular Activation During a Single-leg Drop JumpJihong Park0Kyeongtak Song1Sae Yong Lee2Hohyung Ryu3 Athletic Training Laboratory, Department of Sports Medicine, Kyung Hee University, Seoul, Korea MOTION Science Institute, Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, North Carolina, USA Yonsei Institute of Sports Science and Exercise Medicine, Department of Physical Education, Yonsei University, Seoul, Korea Department of Mathematics, Kyung Hee University, Seoul, KoreaPURPOSE We examined the immediate effect on ankle or knee joint cooling on the lower-extremity activation during a single-leg drop jump. METHODS Twenty healthy adults randomly completed three data collection sessions (a 20-minute ankle or knee joint cooling, or control). Two wireless surface electromyography (EMG, 2,000 Hz) electrodes were attached over the vastus medialis (VM) and the medial gastrocnemius (MG) on their right limb. Subjects were asked to drop down from a wooden box (a 30-cm height) on their right foot onto the force platform (2,000 Hz) and then performed an immediate jump as high as they could. Whole EMG signals (normalised by the mean EMG value recorded during a reference position) within the preactivation (100-ms prior to contact) and the ground contact (on the force platform) during the drop jump task were analysed using functional linear models(p=.05, Cohen’s d effect size: ES). RESULTS After knee joint cooling, (1) the VM activation was decreased during the ground contact (6 to 14%, 30 to 45%, 60 to 90% for ES of 0.50, 0.47, and 0.61, respectively) and (2) the MG activation was increased during the preactivation (84- to 29-ms prior to initial contact, ES=1.30) and the ground contact (59 to 100%, ES=1.40). No changes were observed under the condition of ankle joint cooling or control. CONCLUSIONS A 20-minute unilateral knee joint cooling may result in an ipsilateral quadriceps inhibition during a drop jump task. The gastrocnemius appears to increase activation as a compensatory strategy responding to the quadriceps inhibition. The altered neuromuscular activations do not seem to put an individual at risk of injury, resulting from compressive forces in the sagittal plane.http://www.ksep-es.org/upload/pdf/es-29-3-225.pdfelectromyographypreactivationdrop landingfunctional data analysis |
| spellingShingle | Jihong Park Kyeongtak Song Sae Yong Lee Hohyung Ryu Ankle Joint Cooling did not but Knee Joint Cooling altered the Quadriceps and Gastrocnemius Neuromuscular Activation During a Single-leg Drop Jump 운동과학 electromyography preactivation drop landing functional data analysis |
| title | Ankle Joint Cooling did not but Knee Joint Cooling altered the Quadriceps and Gastrocnemius Neuromuscular Activation During a Single-leg Drop Jump |
| title_full | Ankle Joint Cooling did not but Knee Joint Cooling altered the Quadriceps and Gastrocnemius Neuromuscular Activation During a Single-leg Drop Jump |
| title_fullStr | Ankle Joint Cooling did not but Knee Joint Cooling altered the Quadriceps and Gastrocnemius Neuromuscular Activation During a Single-leg Drop Jump |
| title_full_unstemmed | Ankle Joint Cooling did not but Knee Joint Cooling altered the Quadriceps and Gastrocnemius Neuromuscular Activation During a Single-leg Drop Jump |
| title_short | Ankle Joint Cooling did not but Knee Joint Cooling altered the Quadriceps and Gastrocnemius Neuromuscular Activation During a Single-leg Drop Jump |
| title_sort | ankle joint cooling did not but knee joint cooling altered the quadriceps and gastrocnemius neuromuscular activation during a single leg drop jump |
| topic | electromyography preactivation drop landing functional data analysis |
| url | http://www.ksep-es.org/upload/pdf/es-29-3-225.pdf |
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