The Foundation of Movement
By Larry Betz | Prepared Not Paranoid https://www.preparednotparanoid.com/
A client comes in with lower back pain. We look at the back. Then we look at the hips, and they barely move.
Another has knee pain. The knee looks fine. The ankle is stiff as a board.
In my years running gyms and training clients, much of it post-rehab work and helping older adults stay strong, I've seen this over and over. Where it hurts is often not where the problem starts. Understanding mobility and stability is how you find the real source.
This matters for more than the gym. Moving well is part of being prepared. Getting down on the floor to help a child, catching yourself on a slippery step, carrying groceries up the stairs, getting a parent up after a fall: all of it depends on joints that move when they should and hold steady when they should.
What Is Mobility?
Mobility is the cornerstone of physical health and athletic performance. It's the ability to move freely, confidently, and pain-free in a variety of directions, in sports and in daily life.
Good mobility lets you handle everyday activities with ease and train with efficiency and effectiveness. It's not just about the range of motion of your joints. It also depends on the flexibility and responsiveness of your muscles and connective tissues.
What Is Stability?
Stability is the ability to control the movement and position of your body, especially during dynamic movements and changes in posture.
It depends on the coordination and strength of your muscles to keep you in proper alignment and balance. Stability works hand in hand with mobility so your movements are controlled and safe, which helps prevent injuries and improves performance.
Good stability requires:
Strong core muscles
Balanced muscle activation
Good proprioception (your awareness of where your body is in space)
The Role of Mobility and Stability in Daily Life
In daily life, mobility affects everything: bending down to tie your shoes, reaching for something on a high shelf, walking up and down stairs. When your joints and muscles are flexible and responsive, these movements feel effortless.
As we age, decreased mobility can make these tasks harder, leading to discomfort and a lower quality of life.
Stability makes sure these movements are not just possible, but safe, reducing the risk of falls and injuries. That's no small thing. According to the CDC, more than one in four adults age 65 and older falls each year.
The Joint-by-Joint Approach: From the Ground Up
The joint-by-joint approach recognizes that different joints need different things to work well. Working from the ground up, the pattern alternates:
This concept comes from strength coach Mike Boyle and physical therapist Gray Cook, and Cook explains it in his book Movement.
Why This Matters
Your body is going to do whatever you tell it to do. If a joint that should be mobile is restricted, your body will still find the motion you're asking for. It just takes it from a joint that isn't designed to provide it.
That's how a stiff ankle turns into a sore knee, and tight hips or a stiff upper back turn into lower back pain.
One note: this is a simple model, not a law. Every joint needs some of both mobility and stability. The approach just tells you what each joint needs most.
Use It as a Self-Assessment
The joint-by-joint approach is a great place to start a self-assessment. For example, if your ankle feels tight, and the ankle is supposed to be mobile, it's a good idea to add exercises that help it move more freely. Parts 2 and 3 of this series give you strategies to do exactly that.
Here are three simple self-checks you can do at home. Move slowly, and stop if anything hurts.
1. Ankle Mobility: Knee-to-Wall Test
Face a wall in a half-kneeling or split stance, front toes a few inches from the wall.
Keeping your heel flat on the floor, drive your front knee forward to touch the wall.
Slide your foot back a little at a time until you can just barely touch the wall without your heel lifting.
Compare sides. Many people can reach about 4 inches (10 cm) from the wall. If one side is much tighter, or both are close to the wall, your ankles may need work.
2. Upper Back and Shoulder Mobility: Wall Reach
Stand with your back against a wall, feet a few inches out, low back gently against the wall.
Raise both arms overhead with your thumbs leading.
Can your thumbs touch the wall without your lower back arching off of it, or your ribs flaring? If not, your thoracic spine or shoulders may be limiting you.
3. Stability: Single-Leg Balance
Stand near a counter or wall for safety.
Lift one foot and balance, without touching down, for up to 30 seconds. Then switch sides.
Notice the difference between sides, and how much your ankle, knee, and hip wobble.
Research has linked being unable to balance on one leg for 10 seconds in middle and older age with higher health risks. If that's hard for you, balance training should be a priority.
Ask Yourself
Where does my body feel tight, and where does it feel shaky?
Does the place that hurts match the place that's actually stiff?
Could I get up off the floor without using my hands, or help someone else up?
Remember
Where it hurts isn't always where the problem starts. Give each joint what it needs most, mobility or stability, and your body won't have to borrow motion from somewhere it shouldn't.
Go Deeper
Free download: My Dynamic Warm-Up Guide walks you through the same 16-move warm-up I give my new clients, with a video demo for every move. It's a great way to work your ankles, hips, upper back, and shoulders before every workout. [WARM-UP GUIDE]
Protecting an aging parent? Strength and balance are the foundation of fall prevention. My Senior Safety resources, including the Senior Safety Fall Prevention Checklist, help you make their home safer, room by room. [CTA: Comment or DM "[KEYWORD]" / or download it here: LINK]
Tools I recommend: You'll find the mobility and balance tools I recommend, plus fall prevention products for older adults, in my Amazon store and Senior Safety store. [AMAZON STORE LINK] [AMAZON SENIOR SAFETY STORE LINK]
Related reading:
Mobility, Stability, Stretching, and Self Care, Part 2: Understanding Stretching [LINK]
Mobility, Stability, Stretching, and Self Care, Part 3: Movement Preparation and Self-Myofascial Release [LINK]
Senior Falls series, Part 2: Strong, Steady, Independent [LINK]
Garage Gym Essentials: The Complete Guide [LINK]
References
Cook, G. (2010). Movement: Functional Movement Systems: Screening, Assessment, and Corrective Strategies. On Target Publications.
Boyle, M. Advances in Functional Training (the joint-by-joint approach).
Centers for Disease Control and Prevention, Older Adult Fall Prevention: Facts About Falls. https://www.cdc.gov/falls/data-research/facts-stats/index.html
Araujo, C. G., et al. (2022). Successful 10-second one-legged stance performance predicts survival in middle-aged and older individuals. British Journal of Sports Medicine.
Disclaimer
This article is for general informational and educational purposes only. It is not medical advice and is not a substitute for an assessment by your physician, physical therapist, or a qualified fitness professional. The self-checks above are simple screens, not a diagnosis. Check with your doctor before starting a new exercise program, especially if you have an injury, a health condition, or a history of falls. Stop any movement that causes pain, and always use a wall or counter for support during balance work. Product mentions reflect my own experience; I may earn a commission from some links.
If someone falls and is injured, or can't get up, call 911.
Awareness gives you time. Time gives you options.
The prepared protector is someone who's decided that loving someone means being ready for them, not just hoping things go fine.
Prepared Not Paranoid. Protecting the Most Vulnerable Among Us.
