Mark Leffler - Certified personal trainer located in San Francisco, California.

My name is Mark Leffler and I’m an ACSM Certified Personal Trainer in San Francisco, CA.

I began my career in the fitness industry in the Greater Boston area of Massachusetts in 2009. Since then I have relocated to the west coast, have met some great minds in the industry, and have had the opportunity to work with many people of diverse backgrounds. Learn more

Principles I train by

+

Education

WTFO believes in shared knowledge and educates clients, during their training, on the scientific disciplines behind an excellent foundation for your best fitness and wellness.

+

Safety

WTFO believes in keeping you healthy. You are encouraged to perform exercises that are beneficial to your health, but challenge your will.

+

Form and Function

WTFO believes maximum benefits, in strength and mobility, are achieved by aligning your training routine with physical demands encountered on a daily basis.