How Well Do Hip Replacements Work? New Research Raises Questions…

By /

You can’t watch TV or cruise the Internet without seeing ads for Hip Replacement surgery where you see active people doing everything from riding bikes to climbing mountains. Heck, these ads are even on the buses where I live. However, how realistic is that? Today we’ll focus on new Hip Replacement research that doesn’t really support the idea that people who get a “new hip” become more active. Let’s dig in.

The Ads for Hip Replacement

The Internet is full of ads showing people rocking high levels of physical activity after Hip Replacement. Check a shot from this video from UC San Diego Health:

activity after hip replacement

This guy is riding his bike to the top of mountains after double Hip Replacement surgery! Or here’s another one from the University of Iowa:

However, is any of this accurate? Do most people get to these activity levels after Hip Replacement?

Join us for a free Regenexx webinar.

New Research

Digital devices are transforming orthopedic studies. Why? Because activity levels after a procedure used to be determined by the patient filling out a questionnaire. That brings all sorts of issues as sometimes patients don’t fill out the questionnaire. Othertimes they may over or underestimate their actual activity levels. However, now with digital devices that patients wear, you can get an accurate snapshot of activity levels.

This new research used digital wrist trackers in 51 patients who had all undergone the same type of Hip Replacement surgery. These activity levels were determined at 1 and two years after the procedure and compared to prior to the surgery. The authors also performed a 3-D gait analysis.

The good news? The limp that the patients generally had prior to the Hip Replacement got better.

The bad news? The patients didn’t get any more active after the procedure. In fact, their sleep efficiency got worse at 2-years after the surgery. In addition, people got LESS active at one year and even less active at two years after the surgery.

So much for those ads showing people biking up mountains! This study didn’t support that this is a real or average result of having a Hip Replacement.

The upshot? While you may really need a Hip Replacement, the actual results aren’t as great as the ads, so don’t expect to begin to run marathons or climb mountains after surgery. Like everything in medicine, there is the hype and then the reality.



(1) Bahl JS, Millar SC, Fraysse F, Arnold JB, Taylor M, Callary S, Solomon LB, Thewlis D. Changes in 24-Hour Physical Activity Patterns and Walking Gait Biomechanics After Primary Total Hip Arthroplasty: A 2-Year Follow-up Study. J Bone Joint Surg Am. 2021 May 27. doi: 10.2106/JBJS.20.01679. Epub ahead of print. PMID: 34043603.

If you have questions or comments about this blog post, please email us at [email protected]

NOTE: This blog post provides general information to help the reader better understand regenerative medicine, musculoskeletal health, and related subjects. All content provided in this blog, website, or any linked materials, including text, graphics, images, patient profiles, outcomes, and information, are not intended and should not be considered or used as a substitute for medical advice, diagnosis, or treatment. Please always consult with a professional and certified healthcare provider to discuss if a treatment is right for you.

Get Blog Updates by Email

By submitting the form, you are agreeing that you read and consent to our Privacy Policy. We may also contact you via email, phone, and other electronic means to communicate information about our products and services. We do not sell, or share your information to third party vendors.

Category: Uncategorized
Copyright © Regenexx 2021. All rights reserved.



9035 Wadsworth Pkwy #1000
Westminster, CO 80021


*DISCLAIMER: Like all medical procedures, Regenexx® Procedures have a success and failure rate. Patient reviews and testimonials on this site should not be interpreted as a statement on the effectiveness of our treatments for anyone else.

Providers listed on the Regenexx website are for informational purposes only and are not a recommendation from Regenexx for a specific provider or a guarantee of the outcome of any treatment you receive.