Fitness Trainers | Staff

Katie Thornhill

The owner of Personal Pilates Plus, Katie Thornhill, has a Bachelor of Science in exercise and sports sciences, and an Associate’s Degree as a physical therapist assistant. She is a certified personal trainer with National Strength and Conditioning Association, a certified Pilates instructor, and a certified prenatal/post-partum instructor. She has worked in the fitness and health industry for 20 years. Other specialties include stability/core training, ball exercise, and free weights. Her philosophy is facilitating a balance in life with family, education, occupation, emotional, physical, social, and spiritual wellness.

Heather Lee

Heather Lee has her Bachelor of Science in Kinesiology from the University of Colorado at Boulder in 1993. She obtained her Physical Therapists Assistant degree from Denver Technical College in 1999. Heather received her Pilates certification from the Donna McLean studio and has been using her knowledge in both a rehab setting and here in the studio. She has worked in the physical therapy setting since 1995 in sports medicine and manual therapy settings. Heather continues to work full time as a Physical Therapist Assistant. In her spare time, Heather enjoys the Colorado outdoors and telemark skiing and competes in triathlons.

Jen Duffley

Certified Pilates instructor, Jen Duffley, began her fitness journey at a very young age. A former competitive gymnast and coach, Jen was trained to work diligently, developing a sense of confidence, and an eye for form and technique. This, she believes, is the foundation to achieving the best results with any activity. Incorporating patience and a calming mind-set, Jen encourages her clients to accomplish the ultimate: core strength and balance. Jen is passionate about finding that perfect combination of mind and body, and believes that any good fitness program should be challenging and integrative.

Outside of her Pilates life, Jen enjoys skiing, biking, and traveling. Jen continues to educate herself through PhysicalMind Pilates and passes this expertise on to her clients.

Heather Phifer

Heather began her love and exploration of Pilates as a student at Personal Pilates Plus in 2008. She found Pilates to be such an invigorating and relaxing practice that it became crucial to include it in her life permanently and to explore the practices of Joseph Pilates in more depth. In 2009, Heather received her certification from the Donna McLean Studio and continues her education under the supervision of second generation Pilates masters and the senior staff at PPP. In her spare time Heather enjoys making modern, unique children’s rooms and home decor at her local business, Elevated Scraps.

Amy has always loved being active, she spent her college and post college years commuting by bike or rollerblades.  Amy has a passion for fitness and a love for teaching.  She has been a certified Personal Trainer since 2006 and over the last decade she has taken certifications in Group Exercise, TRX, Yoga, Silver Sneakers/Senior Fitness and is a Fitness Nutrition Specialist..  Her favorite exercise discipline is anything using weights or resistance, working out the heart, challenging the brain and body simultaneously.   Amy has been teaching exercise and specifically bootcamps in North West Denver since 2006. She loves coaching others  how to take care of their bodies through proper nutrition and supplementation.  When asked what keeps her going, she says, ” I get joy from movement and even more joy from sharing fitness and wellness with others.