
The Fitness Source Big Bear is a San Bernardino county Covid Compliant business. We utilize rigorous cleaning practices and require the use of face coverings, physical distancing and hand sanitizers. Thank you for your continued cooperation.


Born and raised in Montana, Nina Mushin started her fitness journey at the age of 5. She was trained in ballet, then tap and jazz until the age of 17. She played many sports growing up to keep herself active with softball, basketball, volleyball, gymnastics, and track. She was also active with swimming and being a lifeguard at their hometown pool. It was Nina’s coaches in High School that started her with weight training. Since college, she has been active keeping fit at gyms and working out on a daily basis. She believes that keeping active is a priority to staying fit and building a strong immune system.
Nina became involved in the Sales Industry after college and has maintained a Sales background in the Automotive Industry. As busy as she was, she continued visiting local gyms to stay fit. Her and her husband, Don, have owned a home in Big Bear since 2002 as seasonal residents, visiting Big Bear as time allowed. They have become local residents as of September 2017 when Don had a chance to retire from the Automotive Industry as a General Manager.
Together, Nina & Don have found their niche in becoming owners of The Fitness Source Big Bear. Don has always wanted to own a business in Big Bear and with Nina already working at the gym as an employee, they grabbed the opportunity to take over as owners.
As locals they would love to see more residents becoming active and starting or continuing a fitness routine to help meet their fitness goals. They welcome all locals, Seasonal Residents and Tourists to visit the gym when time allows and offer different memberships to meet one’s needs.