4 Blocks. 1 Hour.
The Perfect Fitness Formula.





Exclusive pre-sale offer available now!

Now is the time to lock in the best membership pricing.
MemberShip Sign Up
Current Founding Membership Offer
(Offer ends April 18. Your card will be charged at the time of purchase for the first month of your membership, but you will not be charged again until June 2021, one month after the gym opens.)
Unlimited Classes - $179/month
12 Classes/Month - $154/month
8 Classes/Month - $139/month

All Founding Members will also receive:

  • Two free months of X⁴ At Home
  • $10 gift card to Sol Y Luna or Revelator Coffee Company in Lane Parke
  • X⁴ Fitness Mountain Brook shirt
  • X⁴ MiiR coffee mug
X⁴ is a high-intensity interval training (HIIT) workout featuring four unique blocks - TRX, TrueFrom, Strength and Capacity. The movement and equipment used at each station change daily to keep you challenged and engaged. X⁴ is for all fitness levels, and the flexible programming allows the classes to meet every individual's fitness needs.

The X⁴ Mountain Brook Community

We value our members as more than athletes. We take the time to invest in each person who walks through the door of our facility, no matter if they are a regular or visiting for the first time. We are committed to providing a safe, fun and effective workout for every member, in every class. We believe in investing in you and your fitness journey and ask that you invest in yourself and your fellow members in return. This is what makes our community unique.