We are a personal training company dedicated to inspiring world fitness, one family at a time.


Who is a Trunk Trainer?

A Trunk Trainer is a reliable, knowledgeable, friendly, excuse busting certified personal trainer that has a trunk of tricks to get you to exercise the way you should for the body you have today.  We travel (equipment in the trunk of our vehicles), we meet in the park (hook the TRX to a tree trunk), we use water therapy for injuries, we work with families and new mothers who can't bring their child to a traditional gym.  Our gym is open for personal training and offers a women's only gym membership 24 hours a day.  We let partners team up to keep costs down for getting individualized help.  We offer regular semi-private classes and free classes at our gym.  We offer a Corporate Wellness Program to sneak exercise into the middle of the day.  We find what makes you love to move and provide realistic fitness advice to all ages and bodies.

As a leading provider of personal training services we take pride in offering the best individualized programs to meet your health and wellness vision. We are dedicated to serving the needs of our customers each and every day.

With experience in working with seniors, soon-to-be mothers, children, teenagers, and athletes, whatever your age and fitness level, Trunk Trainers can help you get to where you want to be physically and mentally.

Meet Our Team

Degree or certification from an accredited institution, two years experience as a certified personal trainer, established client base, Trunk Trainer certified.

Kelsie Wehren, BS in Exercise Science, CPT

Owner and founder of Trunk Trainers Inc, Kelsie has created a company that encourages average individuals to make fitness a priority for the benefit of the family and community. With a Bachelor of Science and minor in Business Administration from University of Oregon in Eugene, OR and her Personal Trainer Certification with the Aerobics and Fitness Association of America, along with numerous other certifications including Silver and Fit, TRX Suspension Training, YogaFit Level 1, Senior, Prenatal/Postpartum, Certified Prenatal Specialist with Fit For Birth, RPM with Les Mills, and numerous other continuing education units, Kelsie can help almost any population change their lifestyles for the better.

Kelsie is married with two boys, ages 3 and 5 years old and is proud to serve as the PTO President at Kealakehe Elementary School. Among other fitness endeavors, she has completed the 2017 Ironman World Championship race held last October, and is working on becoming a certified trainer and instructor with NASM, striving to provide a safe, effective, and relevant personal training company as a resource to the public and other fitness professionals in the community.

Independent Contractors/Certified Personal Trainers

Certified by an accredited institution, one year training experience, passed Trunk Trainers certification.

Mary Kelly, CPT

Having trained as an elite athlete in wrestling for 20 years and then focusing my attention to the fitness and health culture I have developed a desire for improvement and wellness. I began Personal Training in 2012 with the addition of coaching CrossFit in 2015.

Everyday we learn more about our bodies, nutrition, environment and the interconnectedness of all that we think and do. The results of our choices now, impact our present and future health. We all have the ability to make adjustments that can truly affect longevity and quality of life. By providing useful tools I'm excited to assist in altering conscious results, empowering you to reach your highest potential.

Nutrition Assistance
Movement Efficiency
Strength & Conditioning
Body Composition
Stability Improvement
Performance Enhancement

Present & Past Certifications
• Bachelors Degree: Community Health Education
• Elite Athlete/Olympic Caliber in the Sport of Wrestling
• NASM -Performance Enhancement Specialist
• NCSF - National Council on Strength & Fitness
• Olympic Weightlifting
• CrossFit Level 1 Certification & Coach

Certified by an accredited institution, one year training experience, passed Trunk Trainers certification.

Wanda Rowan, CPT, Silver and Fit Director

  • Certified ACE Personal Trainer
  • Certified Silver & Fit Instructor
  • Currently studying for certification in Orthopedic Exercise
  • Certified Master Scuba Diver
  • Certified Rescue Scuba Diver
After a career in IT and full-time travel, Wanda’s goal was to find work she loved and would help her maintain a physically active life as a scuba diver, downhill skier, hiker, and animal care-giver.  Through volunteer work of assisting elderly during fitness classes, she rekindled her passion for fitness. She started lifting weights in high school and kept it up during college, where she also cross-trained by cycling, doing aerobics, & running 5 to 6 days a week, competing in monthly events.  She missed all that action!  So, WOW, Work Outs by Wanda, was born.   
Wanda provides personal training and group fitness instruction (Circuit Strength/Cardio, Yoga) in gyms, homes, or pools to help folks live the lives they want to live by conditioning bodies on a consistent basis with mobility, flexibility and strength programs. She is dedicated to helping you explore how to live a healthier, happier, and more fit life.

Fitness Instructors

Sally Alapai, Zumba Gold

13 years of dance, ballet, pointe, tap, jazz, ballroom. Taught Red Cross swimming lessons and was a certified Water Safety Instructor in college. 10 years as a Curves' circuit fitness instructor. 3 years licensed Zumba and Zumba Gold Instructor.

Zumba Tuesdays and Thursdays 7:30am and 5:30pm. Woman only, 30 minutes

Rod Watai, License/Certified

Zumba®, Pound®, Zumba® Gold, Strong by Zumba®, TRX™ Suspension

Training, Yoga Shred™ Inspired and currently a student of Flexibility University.


Rod loves teaching fitness classes. The choice to pursue health and fitness stems from her two passions: 1) wanting to help people see the positive impact that an active lifestyle has on their well-being and 2) help others to find their happiest and healthiest self through fitness.

Born and raised in Hawaii, Rod is married to her high school sweetheart for over 30+ years (they met in the 9th grade). She's a mother of 5 children and a grandmother to 6 grandchildren. She currently instructs classes in the Kailua Kona, Kealakekua and Waikoloa areas, subs classes for other instructors, and is actively involved in building her community strong through community events.

She looks forward to meeting you in one of her classes soon!!