Rider's muscles | definition of rider's muscles by Medical dictionary
the adductor muscles of the thigh, which come into play especially in horseback riding.
Farlex Partner Medical Dictionary © Farlex 2012
References in periodicals archive
The most common hybrid vehicle of the future may not be the now familiar four-wheel automobile combining an internal combustion engine and electric motor, but the electric bicycle that can be powered either by a rider's muscles
or energy stored in a battery.
As the horse moves, the rider is constantly thrown off balance requiring that the rider's muscles
contract and relax in an attempt to rebalance.