Our Staff

Marty Owner

Marty Lavine: Owner

To Marty, it’s all about the science of strength. Marty’s expertise with the human body and patient style sets him apart in the industry. Marty has an MS in physical therapy and has been practicing physical therapy since 1994. Marty provides the absolute best one on one attention, and total commitment to each and every individual that walks through the door. No matter what injury you’re rehabbing, or what sport you’re trying to get back to, Marty will make sure you’re on the fastest and most thorough road to recovery.  Marty is available for personal training, physical therapy and also runs many of the group HIIT classes at PUSH.


Christopher Flower

He may be known as “Flower” in the gym, but don’t let that fool you. Flower blends multiple workouts including HIIT (High-Intensity Interval Training), boxing, weights and more to whip you into the best shape of your life.   You may often find him having his clients “hit the mitts”, and at times taking a few body blows himself.


Kara McKenna

As a busy mother of two, Kara understands life can be hectic. But that’s not an excuse for skipping a workout. Challenge Kara and find out just how hardcore this mom can be.  Kara has trained at PUSH since we first opened in 2004 and has been ahead of the game practicing HIIT principles long before it was the norm, or any type of CrossFit terminology was used.


Katie Prendergast

“I believe that fitness should enhance your life outside of the gym. Blending strength training, metabolic conditioning, and healthy nutritional advice, I will get you strong enough to tackle any adventure life throws your way!” Katie is a NASM-Certified Personal Trainer with a specialty in corrective exercise, and Precision Nutrition Level-1 certified. Her training programs focus on building all-around strength, improving body composition, enhancing performance, and preventing injury. An avid athlete and sports fan, Katie snowboards, rock climbs and competes in CrossFit. She’s also a craft beer connoisseur.

Forrest Tarsa

Forrest is a force of positive energy focused on building strong, healthy, supportive communities. A big believer in teamwork and the group effect, Forrest encourages those around him to challenge themselves, challenge each other, and work together to get better every day. Fitness should be FUNCTIONAL and allow people to enjoy everyday activities with more strength and energy! Forrest is a positive and purposeful coach who isn’t afraid to make a few dad jokes during a class…He is a lifelong athlete who fell in love with group fitness while working at Les Mills in Chicago and has been a participant and a coach ever since. He is looking forward to seeing you in a class soon! 


Katie Elwood

Katie enjoys working one-on-one with her patients, treating all types of orthopedic issues and injuries with an effective and customized combination of exercise and manual therapy.  Her approach includes a thorough evaluation of a patient, their injuries, and their movement in order to assess and prescribe the best path forward.  When we move well, we feel at our best!  Katie’s goal is to partner with you and provide the best expertise during your rehab and recovery.  She earned her BS in biochemistry at Baylor University and her master’s and doctorate degrees in physical therapy at the University of Colorado.  Katie is also a Graston Technique certified provider.  Outside of Push Gym, Katie keeps just as busy with her husband and three kids and is grateful for the surroundings of beautiful Colorado.

Bill Luddington

Bill signed up for his first triathlon in 2005(Ironman Lake Placid), one race led to another and his passion for triathlons and staying fit inspired Bill to change careers focusing on personal training and triathlon coaching in 2008. Bill Ludington is an ACE Certified Personal Trainer, Ironman Certified Coach, holds certifications in Stages Cycling and TRX.
Bill coaches and trains individuals of all levels and focuses on connecting with his clients in a way that will deliver their desired results. When in the gym, his primary focus is on helping people increase their athletic performance through functional strength, balance, and mobility.
Through Big Dog Coaching, Bill works with clients 1 on 1 to achieve their triathlon goals. His approach to coaching is one of frequent communication to ensure the plan is delivering the results the client desires and allows them to balance their non-triathlon life.


Gina Portolese

Gina has been in the fitness industry for over seven years, and we are so excited for what she can offer in our classes. At the core of her training philosophy, Gina focuses on inclusive fitness. She wants to ensure all individuals have access to training and feel comfortable by doing it. When designing workouts, Gina centralizes on accessibility, approachability, and of course, making sure folks enjoy the movements. Gina has a wide range of certifications, making her the perfect specialist for all of our clients. These include: Certified Personal Trainer and Corrective Exercise Specialty through NASM, Pre and Post-Natal Specialist through Fit for Birth, Inclusive Fitness instructor through Body Positive Fitness Alliance, a Cycling Certification through Schwinn Cycling AND a Group Fitness certification through AFAA.

Jocelyn Blough

Jocelyn is an ACE certified Personal Trainer & Group Fitness Instructor as well as a 200 hour Yoga Teacher. With over 6 years of experience in Personal Training she has helped a variety of clients of all different fitness levels achieve their goals. She specializes in functional fitness and puts a large emphasis on helping her clients create healthy sustainable lifestyle habits.