About Us

The trainers at Group Interval Training are all certified personal trainers with years of experience in all aspects of interval training, nutrition and injury prevention.

Matt Rolph

Matt Rolph

Matt Rolph opened and founded Group Interval Training with the intention of helping people make fitness an essential part of their lives. Since the formation of GIT in 2010 - Matt has lead thousands of workouts and worked with professional athletes to improve their athletic performance, as well as the average Joe’s and Josephine’s - who are working to get in shape and stay healthy. Work out with Matt and trust you are getting knowledgable and well-honed guidance. Matt’s passion is helping you become the best version of you.

Matt Rolph

Nicole Kay

Nicole Kay

Nicole is a certified Personal Trainer via National Strength and Conditioning Association (NSCA) as well as holding a diploma with 500 hands on hours through National Personal Training Institute (NPTI).

Nicole specializes in functional training, HIIT training, Fat loss, Strength training, TRX, Kettle Bells, Group classes and more.

Nicole is committed in creating the perfect balance of fitness components with nutrition to obtain all fitness goals. She develops individual and group programs for all clients and classes with both short term and long term goals.

Nicole is passionate in helping people who want to change and/or enhance their lifestyles for the better and is a mentor for women, to help maximize their time in order to get fit and stay healthy.

Nicole is a firm believer that fitness is and can be FUN and can be built into any ones realistic lifestyle.

Be Strong
Be Healthy
Be Happy


Ashley Marriott

Ashley Marriott

Ashley Marriott has inspired thousands of people to live healthier and happier lives during her 14 years as a fitness professional. Her classes and trainings reach a broad range of clients that include celebrities, busy moms, weekend warriors, seniors and professionals who all share the desire to get fit, have fun, and lead healthier lives.

She’s the creator of Burn ‘N Firm, a DVD fitness sensation and is a frequent guest on television and radio sharing her get fit strategies.

Ashley has co-authored two award winning books, Dump Your Trainer, and Your Best Body Now and has written dozens of fitness and nutrition articles for publications worldwide. She continues to teach packed classes throughout Los Angeles bringing an infectious enthusiasm to all of her classes and training sessions.

Ashley Marriott

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