Life Time has 17.2 million square feet under roof and 1.5 million members. Jeff Zwiefel on converting both into a longevity business.

Recorded in 2025.

Most operators talk about adding a medical offer. Life Time built one inside the clubs it already owns, and Jeff Zwiefel puts numbers on it: what a single location produces, what margin it carries, and how much of an existing membership base he expects to convert.

Zwiefel was president and chief operating officer of Life Time, which he joined when it had seven clubs in Minnesota and left at 180. In his final years there he was building MIORA Longevity and Performance, the company's longevity business, and separately a new vertical, Life Time Health.

In this conversation:

- Why Life Time treats longevity as a conversion problem rather than an acquisition problem

- What one longevity location produces per month, and the margin band he underwrites

- The share of an existing membership base he expects to buy, and why he thinks it is not higher

- Why the hardest of his three build problems was hiring practitioners, not clinical design

- The research that changed his mind on GLP-1s, and what he thinks the category is worth to health clubs

Chapters:

00:00 Cold open

00:29 Introduction

01:39 Seven clubs to a lifestyle company

03:15 The two projects he is scaling

05:31 The longevity gold rush

06:32 Inside the metabolic code

08:28 Hub and spoke, not club by club

09:37 What one location can produce

11:15 How much of the base converts

11:56 Three things that nearly broke it

13:23 Whether this travels outside the US

14:48 Clinic KPIs against club KPIs

16:18 GLP-1s and the health club industry

18:42 Where the next growth comes from

20:15 What he is watching next

Links:

• Jeff Zwiefel on LinkedIn
• Life Time
• Natalia Karbasova on LinkedIn
• Tomorrow Health
• Apply to join FitTech Club