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.
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.