This unusual group of rowers and researchers met on a Charles River dock throughout the spring. On this occasion, Estrada uses electrodes on his legs while simulating full-body rowing on an anchored raft. Tom Darling, a three-time Olympic rower, gives Estrada a helpful push. Darling had been prodding the researchers and paraplegics to take their rowing exercise from the Spaulding lab to the Charles River for months.
Screengrab by Ann Silvio/ Globe staff