MOBILITY IS THE NEW BASE MILEAGE
From The Functional Fitness Protocol — Chapter 8
By Will Power · Marine veteran, four-time Ironman, 300+ races · Last updated July 13, 2026
Not a physician, dietitian, researcher, healthcare provider, lawyer, or financial advisor. How studies are selected and cited
ANSWER
Decades of running and cycling build a powerful aerobic engine and quietly restrict the hips, ankles, and thoracic spine. Chapter 8 makes the case for treating mobility work like base mileage.
Every endurance athlete understands base mileage instinctively — the weekly volume of easy, unglamorous training that doesn't produce a single medal on its own but makes everything built on top of it possible. Skip it, and the higher-intensity work has nothing to stand on. Mobility now plays that exact role for a body in its fifties and sixties, and a man who has never skipped a long run in nineteen years has almost certainly been skipping this instead — because nothing in endurance culture ever told him it mattered as much.
Mobility Isn't Flexibility
Flexibility is the passive range of motion a joint can be moved through by an external force — someone pushing your leg further in a stretch. Mobility is the active range of motion you can move through and control under your own muscular effort. A man can be flexible on a table and still lack the mobility to safely rack a barbell overhead, because the second requires strength and control through the range, not just the range itself.
This explains a pattern a lot of long-time endurance athletes discover the hard way: decades of running and cycling, both operating in a narrow, repetitive range of motion, can leave hips, ankles, and thoracic spine genuinely restricted — even in a man who's never considered himself "stiff" in any way that affected his racing. Endurance sport doesn't demand the full range a squat, a lunge, or an overhead press requires, so the body doesn't maintain capacity it isn't asked to produce.
Why It Matters More as Strength Training Begins
Restricted mobility isn't an inconvenience once you start adding strength and power work back into an endurance-built body — it's the specific factor that determines whether that training gets executed safely or gets executed with compensation patterns that eventually produce overuse injuries. A heavy farmer's carry with restricted thoracic mobility loads the lower back instead of the intended muscles. A jump landing with restricted ankle mobility transfers force somewhere the joint wasn't built to absorb it. Mobility work isn't a separate wellness category tacked onto real training — it's the base layer everything else depends on.
A broader body of falls-prevention research points the same direction: functional mobility and balance training in older adults reduces fall risk and improves the specific movement qualities — hip hinge control, ankle stability, single-leg balance — that determine whether an unexpected trip becomes a stumble or an injury. That's the same category of outcome that makes grip strength worth tracking: the thing that predicts whether your seventies are spent independent or dependent, trained directly rather than hoped for.
What a Real Mobility Practice Looks Like
This doesn't require a separate hour of yoga bolted onto an already full training week. It requires treating mobility work the way base mileage was always treated — unglamorous, consistent, done before the higher-intensity session rather than skipped in favor of it. A genuine hip and ankle mobility sequence, run as a real warm-up rather than a rushed formality, takes ten to fifteen minutes and directly protects every session that follows it.
Three areas are worth prioritizing specifically, given a running-and-cycling-dominant range of motion: hip flexor and hip rotation mobility, ankle dorsiflexion, and thoracic spine rotation and extension. All three are chronically restricted by repetitive, narrow-range endurance movement, and all three are load-bearing in nearly every strength or functional-fitness movement pattern.
Hips: a kneeling hip flexor stretch with a posterior pelvic tilt, 30–45 seconds per side, followed by ten controlled hip circles per direction in a half-kneeling position. Ankles: a knee-to-wall dorsiflexion drill, driving the knee forward over a fixed foot without the heel lifting, ten reps per side, followed by fifteen slow bodyweight calf raises through a full range. Thoracic spine: open-book rotations lying on your side, eight to ten slow reps per side, followed by a cat-cow sequence emphasizing the upper back rather than the lower back, where most men default the movement without noticing.
Run all three pairs, in that order, before any strength or power session — roughly ten to twelve minutes total once the sequence is familiar. This isn't a separate practice bolted on. It's the actual warm-up, replacing whatever generic stretching or slow jogging most gyms default to.
The Protocol Card
Test your baseline first: a bodyweight overhead squat and a deep lunge, honestly assessed for where the restriction actually is — ankle, hip, or thoracic spine. Build a ten-to-fifteen-minute mobility sequence targeting all three, done before training every time, not skipped when time is short. Reassess the same two movements at eight weeks and expect visible improvement in range and control, not just a subjective sense of feeling looser. The research consistently supports mobility work embedded in real movement patterns over isolated static stretching alone — treat it as training, not as an optional wellness add-on.
The Bottom Line
Nineteen years of never skipping a long run built a genuinely capable aerobic engine and, almost certainly, a set of hips, ankles, and thoracic vertebrae that have quietly lost range they don't get to see used. Base mileage used to be the metric that predicted whether the rest of the training week held up. Now it's this.
Content based on The Functional Fitness Protocol — available on Amazon, Kindle and paperback.
WRITTEN BY
WILL POWER
Founder of Will Power Protocols. Marine veteran, 300+ road races & triathlons, 4x Ironman, USAT Nationals qualifier. Books on strength, longevity & performance after 50 — claims sourced. Not a physician, lawyer, or financial advisor; educational only.
SOURCES
- El-Hajjami Nachit L et al. Effects of a 12-Week CrossFit-Adapted Program on Balance, Functional Mobility, and Lower-Limb Power in Community-Dwelling Older Adults: A Randomized Controlled Trial. Healthcare (Basel). 2025;13(24):3294. PMID 41464363
KNOW SOMEONE WHO NEEDS THIS?
FREE TOOL
GET YOUR PERSONALIZED PROTOCOL
Answer a few questions and get a training, nutrition, and recovery protocol built for your body, goals, and schedule.
THIS ARTICLE IS FROM
THE FUNCTIONAL FITNESS PROTOCOL — CHAPTER 8
Get the full protocol on Amazon — Kindle and paperback.
Medical disclaimer. This article is for educational purposes only and is not medical advice. These statements have not been evaluated by the Food and Drug Administration, and nothing on this site is intended to diagnose, treat, cure, or prevent any disease. I share published research as a health enthusiast and endurance athlete, not as a clinician — I do not interpret your results and I do not diagnose. Consult your physician before making changes to your supplement, training, or nutrition regimen, especially if you take prescription medication or have an existing health condition.
FREE GUIDE
HYROX OVER 50: FIRST RACE STARTER SHEET
The course and weights at a glance, how the race is mostly running, and how to build your first weeks of training, from The Hybrid Athlete Protocol and The Functional Fitness Protocol. Free PDF. Enter your email and it opens right away.
You'll also get the occasional newsletter. No spam. Unsubscribe anytime.
MORE ARTICLES
NEW TO F45, CROSSFIT OR HYROX CLASSES? WHY THE FIRST WEEKS HURT, AND HOW TO EASE IN
5 min read →
RECOVERY AFTER 50: REST DAYS, SLEEP AND DELOADS, THE COMPLETE GUIDE
12 min read →
THE KNEE INJURY HEAVY ATHLETES GET ISN'T BAD LUCK — IT'S PHYSICS
9 min read →
FOAM ROLLING AFTER 50: WHAT THE RESEARCH MEASURED
5 min read →