The Effect of Sprint Start Speed on Lower-limb Stiffness in Sprint Runners
Objective: Lower extremity stiffness is associated with variables such as the frequency and length of running steps, the amount of muscle force and power production. Previous studies showed contradictory findings regarding the relationship between lower extremities joints stiffness and start velocit...
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| Format: | Article |
| Language: | English |
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Islamic Azad University, Hamedan Branch
2015-09-01
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| Series: | Biyumikānīk-i varzishī |
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| Online Access: | http://biomechanics.iauh.ac.ir/browse.php?a_id=33&sid=1&slc_lang=en |
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| _version_ | 1849408311761305600 |
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| author | Mansour Eslami Effat Hoseinzadeh Alireza Safaei Kenari |
| author_facet | Mansour Eslami Effat Hoseinzadeh Alireza Safaei Kenari |
| author_sort | Mansour Eslami |
| collection | DOAJ |
| description | Objective: Lower extremity stiffness is associated with variables such as the frequency and length of running steps, the amount of muscle force and power production. Previous studies showed contradictory findings regarding the relationship between lower extremities joints stiffness and start velocity. Sprint start can be highly affected by two key components of lower limb stiffness, namely, force and time. However, no research has yet investigated the effect of start velocity changes on lower–limb stiffness during sprint start. To test the effect of velocity changes on lower-limb stiffness during sprint start.
Method: 15 male members of track and field were selected for this study. Leg stiffness was calculated dividing peak ground reaction force by the leg length. Joint stiffness was also estimated dividing the muscle moment of force by joint angular displacement. Subjects performed a start with three different speeds.
Results: From low to high start velocity, means of leg stiffness, knee stiffness and ankle stiffness increased by 67.53%, 41.9% and 39.03% respectively.
Conclusion: The findings show that lower-limb stiffness could be a key factor in changing runners' acceleration during sprint start. |
| format | Article |
| id | doaj-art-a4a7d2fc8087492098a412b78719f27e |
| institution | Kabale University |
| issn | 2476-4906 2476-5937 |
| language | English |
| publishDate | 2015-09-01 |
| publisher | Islamic Azad University, Hamedan Branch |
| record_format | Article |
| series | Biyumikānīk-i varzishī |
| spelling | doaj-art-a4a7d2fc8087492098a412b78719f27e2025-08-20T03:35:48ZengIslamic Azad University, Hamedan BranchBiyumikānīk-i varzishī2476-49062476-59372015-09-01112533The Effect of Sprint Start Speed on Lower-limb Stiffness in Sprint RunnersMansour Eslami0 Effat Hoseinzadeh Alireza Safaei KenariDepartment of Physical Education and Sport Sciences, Mazandaran University, Sari, IranObjective: Lower extremity stiffness is associated with variables such as the frequency and length of running steps, the amount of muscle force and power production. Previous studies showed contradictory findings regarding the relationship between lower extremities joints stiffness and start velocity. Sprint start can be highly affected by two key components of lower limb stiffness, namely, force and time. However, no research has yet investigated the effect of start velocity changes on lower–limb stiffness during sprint start. To test the effect of velocity changes on lower-limb stiffness during sprint start. Method: 15 male members of track and field were selected for this study. Leg stiffness was calculated dividing peak ground reaction force by the leg length. Joint stiffness was also estimated dividing the muscle moment of force by joint angular displacement. Subjects performed a start with three different speeds. Results: From low to high start velocity, means of leg stiffness, knee stiffness and ankle stiffness increased by 67.53%, 41.9% and 39.03% respectively. Conclusion: The findings show that lower-limb stiffness could be a key factor in changing runners' acceleration during sprint start.http://biomechanics.iauh.ac.ir/browse.php?a_id=33&sid=1&slc_lang=enSprint startVelocity |
| spellingShingle | Mansour Eslami Effat Hoseinzadeh Alireza Safaei Kenari The Effect of Sprint Start Speed on Lower-limb Stiffness in Sprint Runners Biyumikānīk-i varzishī Sprint start Velocity |
| title | The Effect of Sprint Start Speed on Lower-limb Stiffness in Sprint Runners |
| title_full | The Effect of Sprint Start Speed on Lower-limb Stiffness in Sprint Runners |
| title_fullStr | The Effect of Sprint Start Speed on Lower-limb Stiffness in Sprint Runners |
| title_full_unstemmed | The Effect of Sprint Start Speed on Lower-limb Stiffness in Sprint Runners |
| title_short | The Effect of Sprint Start Speed on Lower-limb Stiffness in Sprint Runners |
| title_sort | effect of sprint start speed on lower limb stiffness in sprint runners |
| topic | Sprint start Velocity |
| url | http://biomechanics.iauh.ac.ir/browse.php?a_id=33&sid=1&slc_lang=en |
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