Our focus is on more than just the workout. Our goal is to keep you healthy and functional, all the time, in spite of the modern condition that often keeps us sitting in front of computer screens (see our article on how exercise offsets the mortality risk associated with long periods sitting).

During our sessions, we will work to meet your fitness goals while also addressing common weak areas such as hip and shoulder joints to strengthen weak muscles and stretch those that are overly tight. This will prevent muscular imbalances that can eventually lead to reduced flexibility and injury, and will increase your spine mobility and general ease of movement. For more stubborn issues, we can also offer Muscle Activation Technique or Corrective Exercise sessions to help get you back to feeling and performing your best.

We also assist interested clients in making healthier dietary choices to reduce disease risk and increase longevity. Many of our clients are not 100% plant-based, but every one of them has increased their plant intake throughout our work together. Increased plant consumption is strongly associated with decreased all-cause and cardiovascular mortality risk. Our strategy includes regular food journal reviews and sharing tips for making healthy dietary changes easy, cheap, and habitual.


derek with carrots

Derek Tresize is a certified personal trainer and certified Muscle Activation Techniques specialist through the American Council on Exercise, who also holds a Bachelor of Science in Biology and a Certificate in Plant-Based Nutrition through Cornell University. He strives to help clients improve health, build muscle and functional strength and lose fat through focusing on a plant-based diet and free weight and calisthenic exercise. He has coached competitive bodybuilders, weight-loss contest champions, and many individuals simply looking to improve their health and fitness since 2007.

Derek has been featured in such media as the documentary Eating You Alive, Men’s Health magazine, Bodybuilding.com, Breaking Muscle, Vice, and many more. Follow the links below to our Instagram, Youtube, and blog to view workout videos, lectures, recipes, and more.


Our Services

Initial consultation: Free

Our rate per 1-hour session is $75.

All sessions include exercise instruction, program design, body tracking, and food journal review and guidance.


Contact Information

E-mail: treesize@gmail.com

Phone: (858) 342-6052

Want to Get in Touch?

Comments or questions are welcome.

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