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Judith Caldwell, MST, EdD has been teaching movement classes since 1975. Known for the care that she provides her students, Judith is a compassionate professional who finds it a pleasure to support the well-being of those interested in maintaining their physical, emotional, intellectual, and spiritual health.

With two Masters degrees and a doctorate, Judith continues to expand her knowledge of optimal living, while offering integrative exercise classes, meditation sessions and workshops at Silverado Resort and Spa.

Dr. Caldwell is a degreed and licensed Non-Denominational Minister who enjoys holistic endeavors that provide enrichment and renewal for the body, mind, and soul..


Nancy Mullen, Silverado Resort and Spa Fitness Supervisor/Personal Trainer attended Temple University as a Physical Education major and has been in the fitness industry for over 30 years.

She has worked all facets of the industry including: aerobic instructor at a womens’ fitness studio, Aerobic Director and Manager at La Cancha Racquetball and Health club and currently fitness supervisor and membership coordinator at Silverado Resort and Spa.

Throughout her career, Nancy continues to keep current with fitness trends and her education including AFAA Personal Training Certification, ACE Certified professional aerobic instructor, Injury and Illness Prevention Progressions, Exercise Science fundamentals, Senior Functional Fitness, WaterART Fitness International Certified Instructor and has recently completed WaterART instructor training for Shallow and Deep Water Workouts. “The science of water exercise has given individuals more opportunities to exercise in a safe, effective and FUNctional environment with programs such as Pre/Post rehabilitation, arthritis, weight management and walking programs.

As more doctors are prescribing exercise to help people maintain wellness as well as possibly avoiding chronic diseases such as diabetes, cardiovascular disease, and cancer, I am committed to helping people make exercise part of their daily life”.


Julie Ex, life-long Napa Valley resident, began teaching classes at Silverado Resort and Spa in May 2011. Her career started working as a chemist/engineer for a medical device company where she was running stability studies for a drug coated coronary stent device.

After losing her job along with 600 other employees, she reevaluated her career options. Now, she is doing something she enjoys and is truly passionate about.

Julie is ACE certified Group instructor and has attended workshops for Turbo Kick and WaterART™. She is a NASM (National Academy of Sports Medicine) Certified Personal Trainer and experienced in Pilates and core training.

Although working in the fitness industry has been a big career change, it is a perfect fit for Julie and she is happy working with such wonderful associates and dedicated members and guests.


Following early ballet classes in her home state of Rhode Island, Regina enrolled in the San Francisco Ballet training program, then under the direction of Harold Christensen. Subsequent training was at the Academy of Ballet in San Francisco with Alan Howard, former premier danseur with the Ballet Russes of Mont Carlo.

Regina became a certified instructor for the New York City Ballet Workout in 2001. She is currently a member of the faculty at Napa Valley Ballet, where she teaches Ballet Basics. At Silverado Resort and Spa, Regina teaches Flexibility classes as well as Barre Basics Workout.