Running to Lose Weight: How Much Should You Run Each Week?

At 60 years old, I weighed 194 pounds. I’d been running to lose weight on the treadmill for two years — 3.5 miles every other day, sometimes every third day — and the scale wouldn’t move. Then I read Peter Attia’s Outlive in late 2024, gradually raised my mileage from 3.5 to 5 miles per run, and within six months my weight dropped under 180 lb. Eighteen months later, at age 62, I weigh 179 lb. I don’t diet. I don’t count calories. The number doesn’t budge, even after the two- or three-week vacations every year when I don’t run at all. This is what running for weight loss actually looks like when it works.

The Short Version

Starting point: Age 60, 194 lb, running 3.5 mi every 2-3 days for 2 years. No weight change.
The change: Read Peter Attia’s Outlive. Gradually raised distance: 3.5 → 4 → 4.5 → 5 miles per run. Same frequency.
The result: Lost ~15 lb in 4-6 months. Held at 179 lb for 18+ months and counting.
What I did NOT change: No diet. No calorie counting. No supplements. No high-intensity intervals.
Vacations: Two to three weeks off, no running. Weighed before and after — no change.

Why 3.5 Miles Wasn’t Working

For two years I told myself I was “running to lose weight.” I was running. The weight wasn’t going. The math, looking back, was obvious. A 3.5-mile run at my pace and weight burns roughly 350-450 calories. Three runs a week, on a good week, gets me to about 1,100-1,300 calories of net deficit — before accounting for the well-documented fact that runners eat more on training days. At 194 lb, that wasn’t enough to overcome the modest daily creep that adult eating habits produce.

The volume was below my body’s threshold for triggering real change. I think this is the trap most adults over 50 fall into when they take up running for weight management: enough effort to feel virtuous, not enough volume to actually shift the equation.

Reading Outlive Changed What I Was Optimizing For

Peter Attia’s Outlive came out in 2023. I read it at the end of 2024. The argument that landed for me wasn’t about weight at all — it was about VO2 max. Attia spends most of the book on what he calls “the four horsemen” (cardiovascular disease, cancer, neurodegenerative disease, type 2 diabetes) and the lifestyle interventions that delay them. Aerobic capacity, measured as VO2 max, turns out to be one of the strongest predictors of all-cause mortality — stronger than smoking, hypertension, or high cholesterol in some studies. And the lever for raising VO2 max in later life is sustained aerobic training. Not interval sprints. Not crash programs. Volume.

That reframed running for me. I stopped thinking of distance as a chore to burn calories and started thinking of each mile as a deposit in a longevity account. Once the goal changed, the mileage went up — not because I forced it, but because I wanted to.

The weight loss came as a side effect.

How I Went From 3.5 to 5 Miles

I didn’t jump from 3.5 miles to 5 in a week. That’s a recipe for shin splints, knee pain, and the kind of overuse injury that ends a running habit. I added distance in steps, holding each new distance for several weeks before pushing further:

3.5 mi → my baseline for two years.
4 mi → held this for about 3 weeks. Used the same frequency (every 2-3 days).
4.5 mi → held for about 4 weeks. Pace stayed conversational.
5 mi → reached this within 2-3 months of starting the build-up. Have stayed at it since.

I run on the treadmill, comfortable incline, easy effort — the kind of pace where I could talk if I had to. This is roughly what coaches and physiologists call Zone 2: a heart rate where you’re building aerobic capacity without producing the kind of acute fatigue that requires multi-day recovery.

What Happened to the Scale

For the first six to eight weeks at the higher mileage, the scale didn’t move much. I’d expected that. Bodies need time to adapt to new training loads, and there’s usually a small water-weight gain as glycogen storage increases. I kept going.

By month three, I was about 5 lb down. By month five, about 10 lb. By month six, I was under 180 lb for the first time in years — and my weight has stayed in a tight band between 178 and 181 lb ever since. As of today, I weigh 179 lb. Eighteen months at that weight. No spikes, no slow creep back up.

Total change: 194 lb → 179 lb. 15 pounds lost over about six months. Held for 18+ months without dieting.

The Test That Surprised Me: Vacations Without Running

Two or three times a year, I take vacations where I don’t run. Sometimes it’s a week, sometimes two or three. I’m not exercising at anything close to my normal intensity. After the first vacation of this kind post-weight-loss, I weighed myself on the morning I left and on the morning I got back. I’d expected a 2-3 lb bounce.

There wasn’t one. Same weight.

I’ve done this deliberately now on several vacation cycles. Same result every time. The weight holds, even with weeks of no training.

I think what’s happening is this: the body composition I’ve built at 15-20 miles per week of sustained running — more lean tissue, more efficient mitochondria, better insulin sensitivity — creates a metabolic state that doesn’t collapse the moment training stops. A few weeks off is too short to lose the adaptations. The weight stays where the system has settled.

What I Do — And What I Don’t

What I do

Run 5 miles on the treadmill, 3-4 times per week
Easy pace, conversational effort, mild incline
Rest one or two days between runs
Track intensity minutes as my weekly volume signal
Eat normally — whatever I’d eat anyway

What I don’t do

No diet, no calorie counting, no “clean eating” rules
No supplements specifically for weight loss
No high-intensity interval sessions (yet — planning to add some after age 65)
No running every day — I leave space for recovery
No fasted runs, no fancy fueling protocols

The Numbers, Laid Out

Age when this started: 60. Age now: 62.
Starting weight: 194 lb. Current weight: 179 lb.
Per-run distance: 3.5 mi → 5 mi.
Weekly running volume: ~7-10 mi → ~15-20 mi.
Weekly sessions: 3-4 (unchanged).
Time to first visible weight loss: 6-8 weeks.
Time to plateau at 179 lb: ~6 months.
Duration at 179 lb: 18+ months and counting.

What This Means for You

If you’re already running and the scale won’t move

Your weekly volume is probably below the threshold that would actually overcome your normal caloric intake. Most casual runners plateau around 10-12 miles per week. If that’s you, try raising distance per session before you change anything else about your diet. Add half a mile at a time. Hold it for three to four weeks. Then push again.

If you’re new to running

Don’t start at 5 miles. Build slowly — the volume that worked for me at 60 took two years of conditioning to reach safely. Start at a comfortable distance you can repeat, get consistent first, then gradually extend. If you’re unsure where to begin, see our intensity minutes guide for the WHO weekly cardio benchmark.

If you’re over 60

Yes, you can lose weight running at this age. The adaptation takes longer than at 40, recovery between runs matters more, and the build-up has to be gradual to avoid overuse injury. But the response to sustained aerobic training is real, and the result is durable. The most common mistake I see in adults over 60 is starting too aggressively, getting injured in week four, and quitting before the body has time to adapt.

Why Running Volume — Not Just Frequency — Drives Weight Loss

Caloric expenditure is the obvious part: a 5-mile run for an adult my size burns 500-650 calories. Multiply by three or four sessions a week, and you’re looking at a meaningful deficit even with normal eating.

But the less obvious part is the adaptation. Sustained aerobic training increases mitochondrial density and capacity, improves insulin sensitivity, and shifts resting metabolism. These changes raise your body’s “default” energy use even on days you’re not running. They’re also slow to reverse — which is why a week or two off doesn’t crash the system.

Research on aerobic dose-response has consistently shown that the relationship between weekly volume and metabolic benefits is non-linear. There’s a threshold below which not much happens, and above which the gains compound. For me, that threshold sat somewhere between 12 and 15 miles per week. Below it: nothing. Above it: 15 lb gone and stable.

Frequently Asked Questions

How many miles do you need to run to lose weight?

There is no universal mileage that triggers weight loss — it depends on your starting weight, diet, age, and conditioning. In my case, running 3.5 miles every 2-3 days at 194 lb didn’t move the scale. Raising the distance to 5 miles per run (about 15-20 miles per week) was the threshold that produced sustained weight loss. The principle is that total weekly running volume usually matters more than per-session intensity for steady weight loss after 60.

Will running 5 miles a day make me lose weight?

It can, but it depends on the rest of your habits. I run roughly 5 miles 3-4 times a week — not every day — and that’s the volume that took me from 194 to 179 lb. The result depends on how long you’ve been running at that volume, your bodyweight, your age, and whether your calorie intake stays roughly constant. For most adults who aren’t restricting calories, a multi-month adaptation period at 5 miles per session is what produces visible weight loss.

Can you lose weight by running without dieting?

Yes. I lost 15 pounds over several months and have held it for 18+ months without changing my diet, counting calories, or cutting carbs or sugar. The mechanism likely involves both the direct caloric expenditure (about 500-650 calories per 5-mile run for an adult my size) and the metabolic adaptations that come with sustained aerobic training. Dieting is not required, but the running volume has to be significant enough to outpace your daily intake.

Is running good for weight loss after 60?

Yes. I started increasing my mileage at age 60 and reached the 5-mile run distance over several weeks of gradual buildup. Recovery takes longer at 60 than at 40, and you need to ramp distance slowly to avoid overuse injury. But the body still responds to aerobic training, and the results are durable. The biggest mistake older runners make is starting too aggressively and getting injured before the adaptation period pays off.

How long does it take to see weight loss from running?

For me, the visible weight change began about 6-8 weeks after I increased my mileage to 4.5-5 miles per run, and stabilized within about 4-6 months. The first few weeks of higher volume usually show no scale change because your body is adapting and you may also gain a small amount of water weight from glycogen storage. Patience through the first 4-8 weeks is critical.

Why am I running and not losing weight?

The most common reason is that your weekly running volume is too low to outpace your normal caloric intake. Many runners build up to 10-12 miles per week and plateau. At that volume, even small dietary increases (often unconscious — runners eat more) cancel out the deficit. Other common causes: not running long enough to trigger meaningful aerobic adaptation, doing only high-intensity short sessions that increase appetite, or running consistently but compensating with reduced non-exercise activity.

What is Peter Attia’s Outlive about and how did it help you lose weight?

Outlive (2023) is Peter Attia’s book on extending healthspan — the years you live without major disease or functional decline. The key idea that changed my running was his emphasis on VO2 max as one of the strongest predictors of all-cause mortality, and the role of sustained aerobic training in building that capacity. Reading the book in late 2024 made me reframe running from ‘calorie burn for weight control’ to ‘longevity investment.’ Once I increased my mileage for that reason, the weight loss happened as a side effect.

Do you have to run every day to lose weight?

No. I run roughly 3-4 times per week, with 1-2 rest days between sessions. Running every day is more likely to cause injury than to accelerate weight loss, especially after 60. The body needs recovery to adapt to the training load. What matters is total weekly distance at a sustainable pace, not daily frequency.