G Cover Why personal trainers often become a client’s best buddy ← Related Article Visit The Boston Globe Share on Twitter Share on Facebook Comment on this Scroll to top of page Jonathan Wiggs/Globe Staff Christopher Muther worked out with master trainer Albert Samano at the Boston Sports Club. Jonathan Wiggs/Globe Staff Muther realized after three years of training, Samano had become one of his closest friends. Jonathan Wiggs/Globe Staff Muther appreciated everything that Samano has taught him about fitness. But just as much — if not more — he appreciated his friendship. Jonathan Wiggs/Globe Staff It’s not unusual for trainers to bond closely with their clients, inside and outside of the gym, both trainers and clients have found. Jonathan Wiggs/Globe Staff “If I don’t have that bond, then I’ll switch trainers,” Melissa LaGrant said. Above, LaGrant with Equinox trainer Jeff LaJoie.