finger health

im about to get my lisence for massage therapy and will be doing a fair amount of massages a week. during my internship i was doing about 4 massages a week and was really starting to feel the strain in the joints of my fingers. what could i do that would help to strengthen my fingers to better resist the strain i put them under? are fingertip pushups good? it seems like they could be detrimental to joint health. any advice?