Fever 4 The Fitness is the realization of Marc Holder's dream to help people become their best selves through physical fitness. Marc is a Certified Personal Trainer in the Dorchester area of Boston, Massachusetts focused on providing the highest quality individual and group personal training services. With more than seven years experience and having conducted thousands of one-on-one personal training sessions, Marc has a proven track record of client satisfaction, retention and results. Marc provides the same energy to each client whether in a personal session or in a group setting. He is able to cater group sessions to meet the skill levels of each participant.