Validation of a method to predict hammer speed from cable force
Purpose: The purpose of this study was to develop and validate a method that would facilitate immediate feedback on linear hammer speed during training. Methods: Three-dimensional hammer head positional data were measured and used to calculate linear speed (calculated speed) and cable force. These d...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2015-09-01
|
| Series: | Journal of Sport and Health Science |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095254614000088 |
| _version_ | 1811344065633976320 |
|---|---|
| author | Sara M. Brice Kevin F. Ness Doug Rosemond |
| author_facet | Sara M. Brice Kevin F. Ness Doug Rosemond |
| author_sort | Sara M. Brice |
| collection | DOAJ |
| description | Purpose: The purpose of this study was to develop and validate a method that would facilitate immediate feedback on linear hammer speed during training.
Methods: Three-dimensional hammer head positional data were measured and used to calculate linear speed (calculated speed) and cable force. These data were used to develop two linear regression models (shifted and non-shifted) that would allow prediction of hammer speed from measured cable force data (predicted speed). The accuracy of the two models was assessed by comparing the predicted and calculated speeds. Averages of the coefficient of multiple correlation (CMC) and the root mean square (RMS) of the difference between the predicted and calculated speeds for each throw of each participant were used to assess the level of accuracy of the predicted speeds.
Results: Both regression models had high CMC values (0.96 and 0.97) and relatively low RMS values (1.27 m/s and 1.05 m/s) for the non-shifted and shifted models, respectively. In addition, the average percentage differences between the predicted and calculated speeds were 6.6% and 4.7% for the non-shifted and shifted models, respectively. The RMS differences between release speeds attained via the two regression models and those attained via three-dimensional positional data were also computed. The RMS differences between the predicted and calculated release speeds were 0.69 m/s and 0.46 m/s for the non-shifted and shifted models, respectively.
Conclusion: This study successfully derived and validated a method that allows prediction of linear hammer speed from directly measured cable force data. Two linear regression models were developed and it was found that either model would be capable of predicting accurate speeds. However, data predicted using the shifted regression model were more accurate. |
| first_indexed | 2024-04-13T19:41:17Z |
| format | Article |
| id | doaj.art-7cf7350d663b4d5fa4e4ace727449d53 |
| institution | Directory Open Access Journal |
| issn | 2095-2546 |
| language | English |
| last_indexed | 2024-04-13T19:41:17Z |
| publishDate | 2015-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Sport and Health Science |
| spelling | doaj.art-7cf7350d663b4d5fa4e4ace727449d532022-12-22T02:32:53ZengElsevierJournal of Sport and Health Science2095-25462015-09-014325826210.1016/j.jshs.2013.11.005Validation of a method to predict hammer speed from cable forceSara M. Brice0Kevin F. Ness1Doug Rosemond2School on Engineering and Physical Sciences, James Cook University, Townsville, QLD 4811, AustraliaSchool on Engineering and Physical Sciences, James Cook University, Townsville, QLD 4811, AustraliaMovement Sciences – Biomechanics, Australian Institute of Sport, Canberra, ACT 6217, AustraliaPurpose: The purpose of this study was to develop and validate a method that would facilitate immediate feedback on linear hammer speed during training. Methods: Three-dimensional hammer head positional data were measured and used to calculate linear speed (calculated speed) and cable force. These data were used to develop two linear regression models (shifted and non-shifted) that would allow prediction of hammer speed from measured cable force data (predicted speed). The accuracy of the two models was assessed by comparing the predicted and calculated speeds. Averages of the coefficient of multiple correlation (CMC) and the root mean square (RMS) of the difference between the predicted and calculated speeds for each throw of each participant were used to assess the level of accuracy of the predicted speeds. Results: Both regression models had high CMC values (0.96 and 0.97) and relatively low RMS values (1.27 m/s and 1.05 m/s) for the non-shifted and shifted models, respectively. In addition, the average percentage differences between the predicted and calculated speeds were 6.6% and 4.7% for the non-shifted and shifted models, respectively. The RMS differences between release speeds attained via the two regression models and those attained via three-dimensional positional data were also computed. The RMS differences between the predicted and calculated release speeds were 0.69 m/s and 0.46 m/s for the non-shifted and shifted models, respectively. Conclusion: This study successfully derived and validated a method that allows prediction of linear hammer speed from directly measured cable force data. Two linear regression models were developed and it was found that either model would be capable of predicting accurate speeds. However, data predicted using the shifted regression model were more accurate.http://www.sciencedirect.com/science/article/pii/S2095254614000088AthleticsForceHammerMeasurementSpeedThrowing |
| spellingShingle | Sara M. Brice Kevin F. Ness Doug Rosemond Validation of a method to predict hammer speed from cable force Journal of Sport and Health Science Athletics Force Hammer Measurement Speed Throwing |
| title | Validation of a method to predict hammer speed from cable force |
| title_full | Validation of a method to predict hammer speed from cable force |
| title_fullStr | Validation of a method to predict hammer speed from cable force |
| title_full_unstemmed | Validation of a method to predict hammer speed from cable force |
| title_short | Validation of a method to predict hammer speed from cable force |
| title_sort | validation of a method to predict hammer speed from cable force |
| topic | Athletics Force Hammer Measurement Speed Throwing |
| url | http://www.sciencedirect.com/science/article/pii/S2095254614000088 |
| work_keys_str_mv | AT sarambrice validationofamethodtopredicthammerspeedfromcableforce AT kevinfness validationofamethodtopredicthammerspeedfromcableforce AT dougrosemond validationofamethodtopredicthammerspeedfromcableforce |