Get out of pain & avoid injury after 50!
Welcome to The "Joint Longevity Lab" by Fitness Integrated Science. I'm Lauren Eirk, and I'm all about reducing pain, improving mobility, and building strength in midlife and beyond.
On this channel, I'll give you expert exercise tutorials, joint rehabilitation, tips on muscle activation, plus the occasional workout for when you're ready to level up. The goal is to help you move confidently, stay active, and live pain-free. That’s why I also share tons of strategies to pinpoint muscle weaknesses, correct imbalances, and prevent injury so you can keep doing the activities you love.
Ready to get started? Hit SUBSCRIBE and let’s keep you strong, balanced, and pain-free for life!
ABOUT -
Lauren Eirk is a Muscle Activation Techniques Rx Full Body Specialist and a Certified Yoga Therapist with over 40 years of experience. With FIS TV, she brings her expert methods to help people worldwide reclaim their strength and mobility in midlife and beyond.
Joint Longevity Lab
What video length do you enjoy most on this channel?
4 months ago | [YT] | 2
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Joint Longevity Lab
This video is all about Isometrics! They are your best defense when it comes to tightness and weakness. Most people treat tightness with stretching. It feels good for a moment, but the stiffness always comes back. Why? Because tightness isn’t the root problem — weakness is.
When muscles can’t contract efficiently, joints lose stability. The nervous system responds by creating a sensation of tightness to keep you safe. In other words, your body is guarding against movement it doesn’t trust.
🧠 The Science:
• Research shows that muscle inhibition (the inability of a muscle to contract on demand) often precedes injury and joint degeneration.
• Without adequate muscle activation, your joints take on more stress, leading to pain and compensations.
• Stretching may temporarily override that protective response, but it doesn’t restore strength or stability where your body needs it.
✨ The Fix: Isometrics.
My program is rooted in positional isometrics — holding targeted contractions at specific joint angles. Why?
• They “wake up” weak or inhibited muscles safely.
• They provide resistance without compressing the joints.
• They teach the nervous system how to generate tension and control before adding load or speed.
Once muscles are activated and stable, you can progress into more dynamic resistance training with confidence. This is how you reduce pain, protect your joints, and move without fear — at any age.
FYI….
💡 This is the foundation of my 5-Step Cycle of Muscle Maintenance inside FIS TV: Isolate → Activate → Integrate → Challenge → Optimize.
If you’re tired of stretching without results, it’s time to train weakness, not just tightness.
🔗 Explore joint-friendly isometric workouts and muscle activation strategies inside FIS TV — link in bio.
4 months ago | [YT] | 3
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Joint Longevity Lab
Are any of you still trying to stretch your way out of knee pain?
You’re not alone—but the science says that knee osteoarthritis affects 654 million people worldwide and is the most likely diagnosis of knee pain in patients age 45 or older who present with activity related knee joint pain with no less than 30 minutes of morning stiffness (95% sensitivity; 69% specificity). However, in an effort to reduce knee pain, many go about it the wrong way.
“Exercise therapy, weight loss (if applicable), education, and self-management are the first-line treatments for knee osteoarthritis, patellofemoral pain, and most meniscal tears.”— JAMA, 2024
And yet, most people are prescribed mobility drills, foam rollers, or surgery far too early.
The exercises in this video feature a smarter approach consisting of:
✅ Building strength at the hips and ankles
✅ Improving muscular support around the knee
✅ Use resistance training—not force—to regain function
I have always thought that it is more important to fix the source of your pain—not just the symptoms. This will bring lasting results. Knee recovery comes from addressing muscle weakness.
Reference:
Duong V, Oo WM, Ding C, Culvenor AG, Hunter DJ. Evaluation and Treatment of Knee Pain: A Review. JAMA. 2023;330(16):1568–1580. doi:10.1001/jama.2023.19675
5 months ago | [YT] | 1
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Joint Longevity Lab
We often think mobility fades with age—but in reality, it fades with inactivity.
Your body is always adapting… the question is, what is it adapting to?
If we stop moving, we get stiffer, weaker, and more prone to pain.
But if we move with intention—even just a little each day—we give our body the signal to stay strong and capable.
This is why I focus on improving mobility through muscle activation and progressive strength training —not just stretching or high-intensity trends.
💬 What’s one simple way you’ve moved today?
6 months ago | [YT] | 2
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Joint Longevity Lab
This is a question that I get all the time with clients over 50. Muscle protein synthesis continues throughout life, so your body still has the fundamental ability to create new muscle tissue when given proper stimulus. Resistance training remains highly effective - studies show people in their 50s, 60s, and beyond can still gain significant strength and muscle mass with consistent weight training.
Your hormones, while different from your 20s, are still sufficient to support muscle growth, especially testosterone and growth hormone which, though declining, remain active. Life experience often brings better consistency and discipline to training routines compared to younger years. You likely have more time and resources to focus on proper nutrition, recovery, and structured exercise programs.
Muscle memory from previous training can help you regain strength more quickly if you've been active before. The important thing is to remain consistent and work on honing motor skills!
6 months ago | [YT] | 2
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Joint Longevity Lab
"The successful warrior is the average man, with laser-like focus." – Bruce Lee
Remember...
You don’t need to be extraordinary to get extraordinary results.
What matters is consistency, clarity, and commitment.
In a world full of distractions, success belongs to those who focus.
✅ Focus on your movement quality.
✅ Focus on your muscle maintenance.
✅ Focus on doing the small things well — every single day.
That’s what we train for here on The Joint Longevity Lab — to stay strong, mobile, and pain-free with precision and purpose.
🎯 Stay focused. Stay consistent.
Your strength will speak for itself.
#JointLongevity #Over50Fitness #BruceLeeWisdom #FISTV #MobilityAndStrength
7 months ago | [YT] | 1
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Joint Longevity Lab
What do you usually do when your body feels tight or stiff?
Let me know — I’m creating content to help you feel better, not just stretch more.
🧠 You might be surprised which one actually improves mobility!
➡️ Watch my new video on back activation and joint-safe mobility: "Stiff Back? Try This 5-Minute Activation Routine (No Equipment Needed!)"
💬 Comment below if you want help choosing the right strategy for your body.
7 months ago | [YT] | 1
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Joint Longevity Lab
I hope you enjoyed this video and try some of these exercises for yourself. It is through progressive, regular strength training that we can prevent our back from becoming injured in the first place! I am a strong believer in prehabbing, avoiding injuries through an active lifestyle!
The statistics about back injury are pretty staggering. For instance, a peer-reviewed study published in The Lancet Rheumatology, conducted by the Institute for Health Metrics and Evaluation (IHME) at the University of Washington’s School of Medicine showed that low back pain remains the leading cause of disability globally.
In 2020, low back pain impacted 619 million individuals! Researchers expect this number to increase over the next three decades to 843 million! By 2050, a 36.4% rise in low back pain cases is projected. My guess is that we have too many conveniences in our world, from elevators to electric bikes, to all kinds of devices that reduce our physical requirements.
Take control of your health the same way you take care of your car. Regular maintenance. Strategic, consistent resistance training is the key to maintaining your muscles!
Reference: Global, regional, and national burden of low back pain, 1990–2020, its attributable risk factors, and projections to 2050: a systematic analysis of the Global Burden of Disease Study 2021
Ferreira, Manuela L et al.
The Lancet Rheumatology, Volume 5, Issue 6, e316 - e329
7 months ago | [YT] | 1
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Joint Longevity Lab
One of my first presenting opportunities was to teach for a stability ball company. When the ball first entered the fitness industry, they took over by storm! I see them in group fitness programs, rehabilitation settings, personal training studios, and fitness centers. They are such a great at-home prop, since they allow you to change positions so much while working the whole body! If you have not tried them, I encourage you to! Back bends on a stability ball feel so good, and you can't beat the benefit of training spinal extension to offset all the sitting we do!
8 months ago | [YT] | 0
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Joint Longevity Lab
What topic are you most concerned with in your joint health?
8 months ago | [YT] | 1
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