Our Team

Julie Hansell- Owner

Julie began coaching small group fitness classes in 2017 and joined the UF family in 2019. Julie also runs Underground’s adaptive CrossFit program and is a Certified Adaptive CrossFit Trainer. In her spare time, Julie likes to ride one of her many bikes, go camping with friends, hike with her dog LuLu, and prepare for retirement as a cat lady. Her favorite music genre to coach to is 90’s music. Julie has her CFL2 Certification and a Master’s a degree in Sport Administration.

Mark Desin- Owner

Mark started coaching in 2012 and has led over 5,000 small group fitness classes. Mark joined the UF team in 2019. Prior to that he worked as a group fitness instructor, personal trainer, gym manager, and gym owner. Outside of the gym Mark enjoys traveling with his wife Bailey, adventuring with his dogs, golfing, camping, and biking. His favorite music in the gym is 90’s Hip-Hop and Reggae. Mark holds CFL2 and CF Gymnastics certifications and has a Master’s degree in Sport Administration.

Patrick Cusack

Patrick started leading group fitness classes through the Clemson Campus Recreation department in 2020. He began training at UF shortly after and has been coaching at UF since 2022. When not at the gym Patrick enjoys eating food, hiking, cooking, spending time with friends, and going to concerts. His favorite music at the gym is Latin.

Zach Rossitch

Zach graduated from the University of North Carolina at Chapel Hill where he studied Exercise and Sport Science-Sport Administration. After working a couple years on the business side of sport, his passion for fitness and helping others led him back into the performance side. Zach now has 7 years of coaching experience. He has been coaching at Underground Fitness since June 2022 and also manages/coaches at Summit CrossFit South.

Lainey Gosnell

Lainey played 4 years of collegiate D1 basketball. Throughout her college career, she spent time training high school athletes. Lainey has been with UF since 2022. When she’s not in the gym she enjoys being outdoors and spending quality time with friends and family. She also enjoys home improvement projects and recreational sports. Her favorite music in the gym is Hip-Hop and Pop hits. 

Kari Polydoris

Kari has been teaching indoor cycling classes since 2012 and strength and conditioning classes since 2020. She has been at UF since 2021 as a member and coach. When she’s not coaching, Kari loves to be outside and see live music. She enjoys hiking, backpacking, camping, rollerblading, skiing, and going to shows at Salvage Station. A sunny day of activities followed by a few beers outside with local music & friends is her ideal day! She also loves playing with her house plants. In the gym, it’s Hip-Hop music forever. 

Morgan Dotson

Morgan has been a volleyball player her entire life, including playing for her DIII team at Fashion Institute of Technology. Morgan has been going to UF since 2021 and is excited to share her passion for fitness with the world! In her spare time, Morgan loves hiking/being in nature, sewing clothes, and creating her own HIIT workouts and videos. Her favorite music genres in the gym are 80’s hits.