4 Great Locations! Sioux Falls SD, Beresford SD, Sioux City IA, and Sergeant Bluff IA Laura Thesenvitz’s progress so far at Ultimate Fitness for Women in Sioux Falls!  Laura has lost 21 lbs is down 11% body fat and down over 16 inches in 7 months! See More

Contact us at 712-252-2115 for Sioux City and Sergeant Bluff locations

Contact us at 605-361-4399 for Sioux Falls and Beresford locations

Big News! Tanning is now available 24-hours a day 365 days a year at all 4 Ultimate Fitness locations!

Ultimate Fitness is a locally-owned 24-hour fitness center located in Sioux Falls SD(women’s only), Sioux City IA, Sergeant Bluff IA and Beresford SD. We are not a franchise and we pride ourselves in giving members a clean, motivating and non-intimidating atmosphere. If you have never joined a gym and you would like to start, we make it incredibly easy and fast. Join today!



When you work with an Ultimate Fitness personal trainer, you’ll benefit from a personal fitness training program that’s custom-built with your goals in mind.

Our certified personal trainers provide guidance and inspiration through programs tailored to your health and fitness now, and the results you wish to achieve. Whether you want to lose weight and keep it off, build lean muscle, or just look and feel better in the clothes you’re in, your personal trainer will take the guesswork out of how to get there.



Join Online Now Personal Training