Cycling with noncircular chainring system changes the three-dimensional kinematics of the lower limbs |
| |
| Authors: | Felipe P Carpes Frederico Dagnese Carlos B Mota Darren J Stefanyshyn |
| |
| Institution: | 1. School of Physical Education, Applied Neuromechanics Group, Federal University of Pampa , Uruguaiana, Brazil felipecarpes@gmail.com;3. School of Physical Education and Sports, Biomechanics Laboratory, Federal University of Santa Maria , Santa Maria, Brazil;4. Faculty of Kinesiology, Human Performance Laboratory, University of Calgary , Calgary, Canada |
| |
| Abstract: | This study investigated the three-dimensional (3-D) pedaling kinematics using a noncircular chainring system and a conventional system. Five cyclists pedaled at their preferred cadence at a workload of 300 W using two crank systems. Flexion/extension of the hip, knee and ankle as well as shank rotation, foot adduction/abduction, and pedal angle were measured. Joint range of motion (ROM) and angular displacements were compared between the systems. Sagittal plane ROM was significantly greater (P < 0.05) at the hip (noncircular system = 39 ± 3°; conventional system = 34 ± 4°) the knee (noncircular system = 69 ± 4°; conventional system = 57 ± 10°), and ankle (noncircular system = 21 ± 2°; conventional system = 19 ± 4°) resulting in greater pedal ROM (noncircular system = 43 ± 3°; conventional system = 37 ± 5°) while using the noncircular system. Shank rotation ROM was significantly lower (P < 0.05) while using the noncircular chainring (noncircular system = 10 ± 1°; conventional system = 14 ± 1°). These results support a significant effect of the noncircular chainring system on pedaling kinematics during submaximal exercise. |
| |
| Keywords: | Noncircular chainring submaximal pedaling lower limb kinematics cycling motion analysis equipment design |
|
|
