Train Smarter
Age Stronger
A joint-smart, progressive system to rebuild muscle and move with confidence after 50.
TRY FREE FOR 7 DAYS!
(no credit card required!)
DOES THIS SOUND FAMILIAR?
You feel weaker or less stable than you used to
Your back, knees, or shoulders keep flaring up
You don’t trust certain movements anymore
You’ve tried workouts—but they made things worse (or didn’t help)
You know you need strength… but don’t know where to start
Your body doesn’t need more random workouts.
It needs the right kind of strength to support your joints.
Here's what changes when you train this way:
A System That Builds Strength in the Right Order:
THE 5-STEP ISOMETRIC METHOD™
By preparing muscles before adding load, this method builds strength progressively—helping your body adapt safely and reduce stress on your joints.
TESTIMONIALS
"Lauren these videos have changed my life! I have had this app for over a year and when I consistently do my program I feel awesome. When I don't do it my body unravels. This is the first time in the years I have found something that truly works. Who doesn't have 15 to 30 minutes in their day to take care of their body? I do this first thing in the morning to "set" my body. Thank you for giving me back my life and my health!!"
Polly W.
"I just joined FIS. Don’t know why I waited so long.
What a wealth of information! Well organized so you can customize your workout with thought behind every movement."
Bonnie C.
"To all my friends dealing with muscle weakness, joint issues, torn ligaments, hip concerns, and more — I can’t recommend Lauren enough. I’ve been her client for years, dating back to my first hip surgery — working with her both before and after each one."
Caroline K.
"In my 50s and 60s I kept trying to do the same strength training workouts that I did in my 30s and 40s, only to spend more time nursing injuries and I did working out. I experiment it was several different approaches to Fitness And and doing so discovered Lauren Eirk and FIS. After finding Lauren's program, I am pain-free for the first time in 20 years! My body is much more stable, balanced and mobile."
David H.
"I was introduced to Lauren and her muscle strengthening approach to fitness in December 2018. I suffered from regular, crippling lower back strain for 30 years following an injury at age 19. No more!!! Having this wonderful app gives me access to Lauren's meticulously crafted workouts anytime I want to care for my body with specific, intentional movement. I can step onto a mat feeling BLAH and sore from all the sitting I do in my job and after even just a short workout, I feel SO MUCH BETTER! I take Lauren with me when I travel because the FIS OnDemand app has plenty of workouts that don't require props or equipment. I hope lots of people discover Lauren and her intelligent thoughtful approach to Fitness as we age."
Kate L.
"Nothing like it! You will never find another app that you can use for Fitness And rehab rehabilitation for any injury or pain you have. Too many people just want a pill to make them feel better in their body, but you actually need to move properly and functionally. Lauren Eirk is the most forward thinking fitness expert I’ve ever met and trained with. She really cares about what she’s teaching to truly help people. Everything she says, and does is backed by research and science and years of experience."
Beth K.
WHAT YOU GET
(and Why It Matters)
Everything is designed to help you build strength safely, reduce pain, and know exactly what to do—every step of the way.
On-Demand Workouts
Access a full library of joint-safe workouts so you can stay consistent without guessing what to do
5-Step Isometric Method™
Follow a proven progression that builds strength safely—so your body improves without breaking down.
Weekly Training Plans & Calendar
Know exactly what to do each week with guided plans that remove confusion and keep you on track.
Member Community
Get support, ask questions, and stay motivated with others who are on the same journey.
Pain, Prehab and Longevity programs
Target specific issues and rebuild strength so you can move forward with confidence.
Expert Guidance & Live Coaching
Learn directly from Lauren with ongoing coaching to help you train smarter and avoid setbacks.
(No credit card required)
Try the system and feel the difference for yourself.
*After your preview, choose your membership plan
MONTHLY
Full access to the entire FIS OnDemand library for $19.99/month. Cancel anytime.
Only $19.99/month
ANNUAL
Best Value!
Save 33% when you commit to a full year — just $13/month. Billed annually
$159.99/year
MEET YOUR INSTRUCTOR
Lauren Eirk, MS, MAT-Rx, C-IAYT, E-RYT 500, brings nearly 40 years of expertise in biomechanics and muscle health. As a Muscle Activation Techniques Specialist and educator to health professionals nationwide, she created FIS OnDemand to deliver joint-smart strength training specifically for adults over 50.
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