BEN BORSELLINO
Owner - Certified Personal Trainer - Instructor
Ben has over 20 years experience in the fitness industry. Ben is an AFAA certified personal trainer and bodybuilder. His expertise ranges from general weight loss, specialized athletics training, bodybuilding, as well as rehabiltiation, prenatal, and senior citizen fitness. He began his career in 2004 as one of California's top personal trainers at Bally Total Fitness, one of the largest gyms in the country. In less than five years with Bally Total Fitness, Ben moved up from personal trainer to Fitness Manager, supervising 20 personal trainers at two different clubs.
In 2015, Ben realized his passion was no longer in general gym management, but more so in specialized personal training. He felt he could help more people achieve their individual results by solely focusing on one-on-one personal training, small group training, and customized fitness classes. Ben decided to venture out on his own and open Martinez Athletic Club.
Ben enjoys spending time in the Martinez community. Ben is involved in downtown Martinez events, such as street fairs, wine strolls, and beer crawls. He has also participated in fundraisers for the Boys and Girls Club as well as various Alhambra High School sports teams. In 2025, he received his Class-A license for skydiving, being able to jump solo. His most recent bodybuilding titles in 2025 were Bodybuilding Best in Show for the Central California Champtionships along with several other 1st place wins across different categories. In his spare time, he enjoys watching football and movies. He is a member of New Hope church in Concord.
He hopes to keep expanding his gym. He loves community.
CHE JIMENEZ
Instructor - Power Cycle
After moving from the UK, Brit-born Che initially started at the MAC as a member where he loved taking bootcamps and spinning. Che's fitness passion is spin. He even taught at Les Mills Trip in England. He moved onto CycleScape in Walnut Creek. After his tour around the Bay, he wanted something closer to his other business as a professional hair stylist. He has been voted as having the Best Cycling class in all of the SF East Bay two years in a row per Diablo Magazine.
Che has been teaching at the MAC since 2023.
KRISTIN GOPINATH
CPI/CYI
Instructor - Mat Pilates - Yoga
Kristin teaches her Yoga and Mat Pilates classes with the simplicity and silence as a serenity service to you body.Her yoga teachings come all the way from India where she studied Himalayan Kriya yoga to unlock your energy channels and chakras. She also has expertise in Sivananda Hatha Yoga which has a strong focus on the health and physical well-being of the yogi. Kristin is a GM of a major chain of furniture stores in El Cerrito.
Krisitin has been teaching at MAC since 2019.
OLENA MATVYEYENKO
Instructor - Spin - Row - Bootcamp
Certified Personal Trainer
Olena was one of the first MAC instructors. In 2018, she moved onto Row House in Pleasant Hill and Fit-to-the-Core + In-Shape in Concord. She has over a decade of fitness instruction in full body, personal training, and small group workouts at all of these locations. She is now a full-time UX designer, but missed teaching classes and being a part of the community. She likes teaching classes for the fun and fulfillments of others.
Olena has been teaching at the MAC since 2016.
JULIE McGINLEY
Instructor - Mat Pilates - Wellness Yoga
Instructor - Certified Pilates Reformer
Julie is a classically trained Pilates/Yoga Instructor. She has been teaching PilatesYoga for over a two decades. Julie is also a certified Mat Pilates instructor with comprehensive training on the Reformer. Julie teaches water aerobics in Martinez. She has been working on starting her own life coach/nutrition coach business while here at The MAC.
Julie has been teaching at the MAC since 2023.
CLAIRE HUTAPEA
Certified Personal Trainer
Advertising / Marketing & Sales
Clare is a classically trained NASM Certified Personal Trainer, corrective exercise specialist and nutrition coach. She has been a personal trainer for eight years strongly focusing on strength training and functional movement for all ages/leves. She is currently working in law enforcement. She has also recently stepped up at the MAC as our outreach and mulitmedia marketing go-to person. She creates all the ads and showcases all the amazing content that the MAC can offer to you. She has just started up her own advertising/marketing company named @Faceboost.media.
Claire has been training at the MAC since 2022.
COREY LAWRENCE
Certified Personal Trainer
Coach - Bootcamp - Spin
Corey is a NASM certifiied personal trainer and happy to be a part of the MAC Family. She loves to help people meet their goals and show them that they can do anything they set their mind to. Corey is a former P2P Bootcamp coach who migrated over to the MAC. The MAC is grateful to have her. She is happy that she is able to be a part of the P2P and MAC families joining forces to keep our one goal in mind, which is fitness, to keep going.
Corey has been coaching at the MAC since 2025.
MEL RAMOS
Coach - Bootcamp
Mel is a NASM certifiied personal trainer and former power lifter, competing in the Olympias in 2021 in Las Vegas. She is now happy to be a part of the MAC Family. She loves to help people meet their goals and show them that they can do anything they set their mind to. Mel is a former P2P Bootcamp coach who migrated over to the MAC. The MAC is grateful to have her. She is happy that she is able to be a part of the P2P and MAC families joining forces to keep our one goal in mind, which is fitness, to keep going. Her motto is "1% better everyday."
Mel has been coaching at the MAC since 2025.
KIM HO
Instructor - Mat Pilates - Dance
Kim is an ACE certified personal trainer and Pilates instructor. She is a Dance Fitness professional with over 30 years in the fitness industry. Originally from Pinole, she is back in the Bay Area after living and teaching in Las Vegas for the last 20 years. Her passion is anything dance or fitness related. Teaching helps her share her passion with others.
Kim has been teaching at the MAC since 2025.