Zach Guza
Founder
I started Black Dog Fitness so that no one else has to go through what I went through with mental illness and what dad went through with Parkinson’s disease.
I struggled with undiagnosed Depression for years. I just thought that life was supposed to be terrible. I finally realized what was wrong when I saw a video called “I have a black dog and his name is depression.” It stopped me dead in my tracks. That was me. I have a black dog. I have Depression.
When I got professional help, the first thing my psychiatrist told me, before she would even consider medication, was to get back to exercising. Today, regular exercise is a non-negotiable part of my life and is essential for balancing the demands of being a husband, a father, a business owner, and someone who suffers from depression.
So, why Parkinson’s disease?
Zach’s dad, Same Guza, had Parkinson’s Disease but he was never told that exercise would help him live longer, happier and healthier. His doctors either didn’t know or appreciate the power of exercise. Because of that he suffered a terrible decline until his death in 2013.
Hundreds of studies have shown that exercise can slow, stop, and even reverse the symptoms and progression of Parkinson’s Disease but where Zach’s dad lived, there wasn’t the knowledge, expertise or facility to help him.
Zach started Black Dog Fitness and Rock Steady Boxing Knoxville so that no one else has to go through what his dad did.
ZACH’S CREDENTIALS
- Bachelor’s of Science – Human Factors Engineering
- United States Air Force Academy
- Air Force Officer & Helicopter Pilot
- UH-1N Evaluator Pilot
- Certified Personal Trainer – WITS Education
- Functional Aging Specialist – FAI
- Rock Steady Boxing Coach
- Certified Health Coach
- PWR! Moves Instructor
- Urban Poling Instructor
- Rock Steady Boxing Coach of the Year, 2024
Black Dog Fitness Instructors
We all organically found our way to Black Dog Fitness. Different backgrounds. Different stories. Same mission – FIGHTING BACK AGAINST PARKINSON’S!
Somewhere along the way, we each discovered that helping people get stronger, healthier, and more confident is an amazing way to spend our days.
We laugh A LOT, cheer a lot, occasionally count reps incorrectly (don’t worry—we usually give you the extra one), and celebrate every victory, big or small.
At Black Dog Fitness, we’re not just coworkers—we’re a team that’s here to make a real difference in people’s lives… even if it means convincing you that squats are “character building.” 🐾💪
Sarah Lamont
Spin and Stretch, Personal Training, Rock Steady Boxing Assistant Coach and Yoga
Sarah is a Certified Personal Trainer, Certified Yoga Instructor and Certified Spin Instructor. She currently teaches Spin and Stretch and Yoga. She also does personal and small group training.
Sarah began her career in fitness as a traveling PE teach with a Russian “circus”. However, when the child labor laws were updated, she defected to Canada disgused as a gaffer’s assistant with Jeff Leopard an autoharp tribute band of Def Leopard. This is when Sarah discovered her passion for tape and helping people with Parkinson’s disease.
Since regaining her “Personna sorta grata” status in most of the European Union, Sarah has competed in nine international Lawn Darts championships but failed to place due to her poor depth perception and Soviet era wind drift calculations. However, she did place 3rd for Sound Effects and was give a life-time Bronze Level Membership to the Whispering Pines Motel and Livestock Show Yards.
In 2015, Sarah began teaching Spin and Yoga as a therapy for her Fruit Loops dependency. So far, so good.
Perle Sorah
Rock Steady Boxing Coach
Perle has worked his way all the way through the Rock Steady Program. He was diagnosed with Parkinson’s Disease in May 2013, after exhibiting symptoms for many years. He retired from his job after 45 years as a Radiologist Technologist on Friday and started boxing the following Monday.
After about eight months as a fighter, Perle began volunteering in the stage three and four fighters. Interested in still doing more, got Certified as a Rock Steady Boxing Coach in January 2018 and has been Zach’s “co-coach” since.
Perle is certified as an instructor for Nordic Walking from the American Nordic Walking Association and Nordixx Pole Walking of Canada. He teaches group classes and individuals with and without Parkinson’ Disease.
In his “spare time”, Perle and his wife camp, kayak and hike. Perle is an exceptional woodworker and has built everything from small wooden bowls to major pieces of furniture.
His philosophy for life is, “Keep moving or you just might die.”
Jimmy Dabney
MS – Sports Psychology, CPT, CSCS, Rock Steady Boxing Coach
I am a former D1 NCAA All-American swimmer at the University of Tennessee and competed on the USA National level. I graduated with a M.S. in Sport Psychology and Motor Behavior. As a professional swim coach for over 10 years, I spent time coaching at the USA Olympic Training Center in Colorado Springs and was included on the USA Swimming National Team Coaches List for two consecutive years.
As a fitness professional, I have a passion for helping people become strong, confident, and happy in their daily lives. After becoming NASM and CSCS certified for personal training, I have been able to sharpen the skills within my craft. In addition to private 1-1 training, I have worked as a strength coach for high school as well as professional athletes on both the USA National Team and the USA Olympic Team.
I am a family man with a beautiful wife and daughter living in Knoxville, TN. I enjoy walking our two dogs, working out, hiking, surfing, swimming, biking, running, and throwing the frisbee.
Alyson Edwards
OTD, CPT, Rock Steady Boxing Coach
Alyson is a Rock Steady Boxing Coach and Personal Trainer at Black Dog Fitness. She also teaches Spin&Stretch and PWR! classes as needed. In addition to her work at Black Dog Fitness, Alyson is an Occupational Therapist at Patricia Neal Rehabilitation Hospital.
Originally from Huntington, West Virginia, Alyson earned her undergraduate degree in Exercise Science and her NASM Personal Trainer certification from Marshall University. She later moved to Knoxville to complete her Doctorate in Occupational Therapy at Lincoln Memorial University. That’s how she found Black Dog Fitness—Alyson completed the final Capstone project for her doctoral program here.
Originally from Huntington, West Virginia, Alyson earned her undergraduate degree in Exercise Science and her NASM Personal Trainer certification from Marshall University. She later moved to Knoxville to complete her Doctorate in Occupational Therapy at Lincoln Memorial University. That’s how she found Black Dog Fitness—Alyson completed the final Capstone project for her doctoral program here.
Alyson first became interested in fitness while teaching SilverSneakers and water exercise classes. Wanting to do even more to help her clients, she became a personal trainer. Her path eventually led her to occupational therapy, where she could combine fitness, psychology, and rehabilitation to help people regain the ability to do the everyday activities many of us take for granted.
At home, Alyson stays busy caring for her two greyhounds, Zero and Kahn, her hairless cat, Mimzi, and spending time with her husband Jake, her childhood sweetheart.
Taylor Morgan
DPT, Physical Therapist
Taylor is our in-house Physical Therapist specializing in Parkinson’s disease. She came to us after several years in the “mass production” physical therapy world. She works with MovementX Physical Therapy to see patients at Black Dog Fitness.
Taylor’s whole-body and whole-mind approach to physical therapy fits in perfectly with what we do. She is a dedicated and compassionate physical therapist with a profound passion for treating patients with Parkinson’s disease. Taylor is an exceptional Physical Therapist. Many of our staff and their families see her for treatment. Click here to schedule a free 15 minute consultation.
Taylor has become a valuable part of the BDF team. We can stop in for a quick “what-do-you-think” or set up a full cooperative plan between Taylor and your trainer. This helps us target troublesome areas and work on them from a training and therapy perspective. We have had great results from this kind of team work. Together, we work with the whole team (patient included) to set achievable goals so patients can take control of their health and well-being. Patients heal faster and stronger.
In her free time, she loves hiking trails, caring for her cherished houseplants, spending quality time with friends and family, and embarking on adventures with her sweet pup, Ellie.
Mikhala Culberth
Personal Trainer
Mikhala is a Certified Personal Trainer in Knoxville who brings energy, empathy, and real-life experience to every class she leads. She teaches Hit It!, is a Rock Steady Boxing coach, and works one-on-one with personal training clients.
Mikhala’s passion for fitness began in her teenage years after struggling with weight as a child. What started as a personal journey became a lifelong calling. Over the past decade, she has built her career in the fitness industry, driven by a deep belief in how transformative movement can be — physically, mentally, and emotionally. Her firsthand understanding of the life-changing power of exercise makes her a natural fit at Black Dog Fitness.
Outside the gym, Mikhala is an artist, a nature lover, and a proud dog-mom to Poppy.
THE BLACK DOG
In October of 2012, the World Health Organization made video called “I had a black dog, his name was depression.” It is a video version of the 2005 book I Had a Black Dog by Matthew Johnstone.
The instant I saw this video, I realized that my pain had a name, it wasn’t my fault, and it could be treated.
Please contact me if you are struggling with depression. Your life doesn’t have to be bad.

