courage & resolve; strength of character

Whether you're looking to gain strength and power with kettlebells, master heavy bag work, take part in exclusive WODs that have elements of dumbbells, barbells and more, or hone your Tabata-style bag lines and core conditioning, there's only one place to go: GRIT Classes. Our cutting-edge program combines combative movements and regimented strength training so that you get the most out of each session—plus the confidence and fitness necessary to tackle life’s challenges. And that’s not all; our Silicon Valley facilities offer bare-bones fitness for no frills conditioning, fundamental and functional fitness for all levels, and the best group fitness program around! Join us today—we're more than just a gym; we're an active community where you can find your tribe.

In-Person, On-line & On Demand fitness and strength training workouts

You can burn as many as 1000 calories per class.

No experience necessary! This class is good for beginner and advanced levels.

Full body workouts that will get your heart rate up and tone and build muscle strength

At home training that you can access anytime and anywhere 24/7

Certified Professionals
5 Star Business on Yelp
A+ Rating BBB

ASD Unlimited
per month
$119 USD
Access to all classes: Krav Maga, Muay Thai,
Hapkido, Escrima,
Boot Camp, GRIT,
Box&Bells, 300,
& Muay Thai HIIT.
Access to all online classes
Access 5000+ On Demand Videos
Month-to-month membership
No enrollment fees
Sign UpSign Up
Online Unlimited
per month
$39 USD
Includes 14-Day FREE trial
Access all online classes & programs:
JCF Cardio Kickboxing, Boot Camp,
Fighter Fit, GRIT,
Krav Maga, & VKM Kids.
Access all online classes
Online Belt Testing for Krav Maga
Access 5000+ On Demand Videos
No enrollment fees
Month-to-month contract
Sign UpSign Up



  • 7 Live GRIT  Classes a Week
  • 200+ Videos on Demand: Classes and WODs
  • Beginner to Advanced Levels & Techniques
  • Train Like a Fighter without Having to Step into the Ring
  • Certified and Experienced Instructors
  • Free Online Membership Access for duration of your trial (Access 5000+ Videos on Demand)

FREE 14-Day Trial

GRIT Instructors

portrait of a young man with a beard

Michael Tropf

GRIT Instructor


Serra Sullivan

GRIT Instructor


James Krause

GRIT Instructor


Andrea Yip

GRIT Instructor


Shayne Herrera

GRIT Instructor


Johnson Koo

GRIT Instructor