Christopher Paul Elder1,2, Ryan N. Cook1,3,
Ken L. Wilkens1, Marti A. Chance2, Otto A. Sanchez,
12, Bruce M. Damon, 12
1Institute of Imaging Science,
Vanderbilt University, Nashville, TN, United States; 2Radiology
and Radiological Sciences, Vanderbilt University, Nashville, TN, United
States; 3Biomedical Engineering, Vanderbilt University, Nashville,
TN, United States
The
purpose of this project was to use MRI to determine the temporal sequence of
muscle recruitment during cycling by applying variable work rates during the
pedal cycle and validate the imaging data using electromyography. Variable
work rates were applied in two different distributions; the first increased
post-exercise T2 in the extensors and flexors of the thigh, the second
increased post-exercise T2 in the flexors only. Similar patterns were
observed in the electromyography data, providing validation for the future
use of the technique to fully characterize recruitment in individual muscles
during cycling, along with applications to functional electrical cycling.