If you’re thinking about running a marathon (or just building steady endurance), here’s something that might sound a little wild: slowing down could actually be your fastest path forward.
That’s the whole idea behind MAF training, short for Maximum Aerobic Function. It’s a method created by Dr. Phil Maffetone back in the late ‘70s. Instead of chasing speed every run, you train at a low heart rate so your body learns to burn fat efficiently, avoid injuries, and build a rock-solid endurance base.
It’s less “no pain, no gain” and more “chill now, crush later.”
The 180 Formula (Your Training Sweet Spot)
Your MAF heart rate = 180 – your age (with a few small tweaks depending on health history).
Example: If you’re 35, your MAF number = 145 bpm.
Stay at or below that number. Yep, it might feel slow. Yep, you may end up walking. And yep, walkers might even pass you. But here’s the magic: with time, you’ll be running faster at the same low heart rate. That’s your aerobic system leveling up.
Why Bother With MAF Training?
It’s like a whole-body upgrade:
Cardio boost: Lower resting HR, stronger heart, better oxygen delivery.
Metabolic gains: Teach your body to use fat as fuel, stabilize blood sugar, improve insulin sensitivity.
Fewer injuries: Less pounding, more recovery, stronger connective tissue.
Whole-body health: Nutrition, stress, and sleep are tied into the method.
Not just for pro athletes… beginners, older adults, and even people rehabbing from injuries can benefit.
A Beginner’s Week on MAF
Here’s how a week could look:
- Mon: Rest or easy walk
- Tue: 30-min MAF run (mix of jog/walk, keeping HR ≤145 bpm)
- Wed: Low-intensity cross-training (bike, swim, yoga)
- Thu: 40-min MAF run
- Fri: Rest or easy walk
- Sat: Long MAF run (around 60 min, slow and steady)
- Sun: Rest
It’s sustainable, repeatable, and won’t leave you limping into Monday.
Beyond the Miles: Food, Stress & Sleep
MAF is about your whole ecosystem, not just workouts.
Nutrition: Ditch the sugar spikes. Prioritize whole foods, healthy fats, and protein.
Stress: Cortisol kills fat burning. Manage stress like you manage mileage (with intention).
Sleep: The real gains happen while you’re out cold. Protect your 7–9 hours like it’s part of your training plan.
You can’t outrun poor sleep or chronic stress. Trust me. 😉
Common Struggles (and Why They’re Normal)
“I feel too slow.” That’s the point. You’re teaching your body efficiency, not ego.
Plateaus. Check sleep, nutrition, and recovery. Consistency wins here.
Motivation dips. Remember… patience now, performance later.
The Tech Edge
MAF came up in the 70s, but today’s tech makes it next-level:
- Wearables track your heart rate in real time.
- Apps + AI coaching platforms adapt your plan to your data.
- Feedback loops show you progress (and warn you before burnout hits).
It’s like having a personal coach (like me) + lab test in your pocket.
Sally Says
MAF training won’t earn you Strava bragging rights right away… but it builds the kind of endurance that takes you across the finish line with strength to spare.
Run slower today, so you can run stronger tomorrow. 🩵
