Trainers at the YMCA of Metro Denver excel in their field. Learn more about the talented team eager to help you reach your personal fitness goals.


Arvada YMCA

Whitney Allen
Whitney Allen Arvada YMCA trainer


  • B.S. Exercise Science (minor in lifestyle medicine), Metropolitan State University
  • ACSM Certified Exercise Physiologist
  • ACSM EIM Level I
  • ACSM Certified Exercise Cancer Trainer
  • ACE Fitness Nutrition Specialist
  • American Red Cross BLS for Healthcare Professionals
  • Certified LiveSTRONG Coach

Training Specialties: Chronic conditions (including, but not limited to, hypertension, diabetes, cancer during treatment as well as post treatment, transition from physical therapy, arthritis, etc.); women’s weightlifting; boxing; and functional training.

Hometown: Calgary, AB, Canada

Motto: "Open the gates and seize the day" – Newsies

Tyko Birch
Tyko Birch Arvada YMCA trainer


  • 500-hour Registered Yoga Teacher
  • NASM Certified Personal Trainer
  • B.S. in Technical Communication & Minor in Philosophy, New Mexico Tech
  • Secondary Education Teacher Certification, Santa Fe Community College

Training Specialties: Functional strength, range of motion, core strength, whole-body stabilization, Hatha Yoga, Yin Yoga, Trauma-Sensitive Yoga.

Hometown: Santa Fe, NM

Motto: “Water can flow, or it can crash. Be like water, my friends.” –Bruce Lee

Heidi Kullman
Heidi Kullman Arvada YMCA trainer


  • B.A. in Literature from C.S.U.
  • Over 300 hours in Yoga Teacher Training; Certification received (2008, 2012). Over 12 years of experience teaching yoga
  • Mat Pilates certification through AFAA (2016) 5 years experience teaching Pilates
  • Personal Trainer certification through ACE (2018, 2021)
  • Barre Certification through ACE (2020)

Training Specialities: Core strength, flexibility, balance training

Hometown: Lakewood, CO

Motto: Breathe, smile and let it all go

Fonda Porterfield
Fonda Porterfield Arvada Y fitness trainer


  • B.S. & M.S. Health & Human Development, Montana State University
  • ACE Certified Personal Trainer

Training Specialties: Weightlifting, water fitness, HIIT, boxing, kettlebells

Hometown: Bozeman, MT and Waynesville, OH

Motto: “Whether you think you can, or think you can’t, you’re right.” - Henry Ford

Kevin Smith
Kevin Smith Arvada YMCA trainer

CredentialsNCSF Certified Personal Trainer

Training Specialties: HIIT, weightlifting, kickboxing, nutrition

Hometown: Augusta, Kansas

Motto: Progress, not perfection.

Niels Van Hecke
Niels Van Hecke Arvada Y fitness trainer


  • NASM Certified Personal Trainer
  • NASM Fitness Nutrition Specialist

Training Specialties: Kung Fu, Weight Lifting, Functional Flexibility.

Hometown: Santa Fe, New Mexico

Motto: “Pain is a great teacher.” -Grandmaster Chen Yu Lung

Matt Winje
Matt Winje Arvada Y fitness trainer

Credentials: ACE Certified Personal Trainer

Training Specialties: Body Building, Powerlifting, Weight Loss (Female/Male), Sport Specific Training, Kettlebell, High Intensity Interval Training (HIIT), Foam Rolling/Myofascial Relase

Hometown: Loveland, CO 

Motto: “It’s ok to fail on a lift, but NEVER fail to learn!” - Louie Simmons