About us

What We Offer

Cal Fitness & Performance offers:

  • Open Gym every day

  • Personal Training by appointment (see the Membership page for more information)

  • Group Exercise Classes (Bootcamp, Cardio Kickboxing, TRX Strength & Conditioning)

Check the Schedule page for dates and times.

The Owner

Tony Callen has been the owner and operator of Cal Fitness & Performance since it originally opened in 2009. Tony is a certified by NASM as a personal trainer and is also certified to instruct TRX training, kickboxing, and group fitness classes. He also provides Strength & Conditioning work sessions for the local youth athletic programs, including Slinger High School. Tony is assisted by other staff members, who are certified group fitness instructors and/or personal trainers.


Cal Fitness & Performance is in the heart of Slinger; located in the strip mall near the corner of Hwy. 175 and Slinger Road.