I ran my first ultra for the beer. The training I do now, I do in spite of it.
I started running after college — not for fitness, not to look good, but as an excuse to drink more beer. After all, isn’t a long run just carb loading in reverse? Club runs ended with pints at the local pub. The finish line meant one thing: a cold beer. Race directors handed them out like medals, and I earned mine. That post-race beer was never a guilty pleasure — it was the ritual, the reward for the suffering. Nothing about it ever felt like a problem. (Heart attacks aside!)
But now, as an endurance athlete in my 70s, I need every advantage I can get to keep going. And alcohol isn’t one of them.
For decades I treated that finish-line beer as free. A reward with no receipt. Then I started actually measuring my training with my Garmin — resting heart rate, sleep, recovery — and the numbers told a story my taste buds didn’t want to hear. That beer isn’t your reward. It’s a tax on the very engine you just spent two hours building.
Here are three reasons alcohol quietly sabotages your endurance after 50 — and why cutting back might be the easiest performance gain you’ll ever make.
#1 - Alcohol Robs the Repair Window
You don’t get faster during your run. You get faster in the hours after it, while your body repairs the muscle you just broke down. Coaches call it the recovery window, and for the first 60 to 90 minutes after a hard effort, your muscles are primed to soak up protein and rebuild stronger than before.
Alcohol slams that window shut.
Researchers in Australia put this to the test. They had trained athletes finish a hard workout, then gave them either protein, protein plus alcohol, or carbs plus alcohol. The protein-only group recovered as expected. But add alcohol to the mix and muscle protein synthesis — the actual rebuilding process — dropped by up to 37 percent.1 Thirty-seven percent. You did the work. You earned the adaptation. Then you poured a third of it down the drain.
Here’s the part that should get every one of us over 50 to sit up. As we age, our muscles already become less responsive to the rebuild signal. We need more protein, not less, to trigger the same repair a 30-year-old gets easily. We’re already starting from behind. Drinking after a run digs the hole deeper at the exact moment we can least afford it.
That post-run beer? A protein shake does the opposite job. One closes the window. The other props it wide open.
That beer isn’t your reward. It’s a tax on the very engine you just spent two hours building.
#2- Alcohol Drains Your Fuel Tank and Your Fluids
Endurance runs on two things: stored fuel and water. Alcohol comes after both.
After a long run, your muscles are scrambling to refill their glycogen stores — your body’s premium fuel for the next effort. Drink alcohol during that refueling, and glycogen resynthesis slows by as much as 50 percent.2 You show up to your next run with a half-empty tank and wonder why your legs feel like sandbags.
Then there’s hydration. Alcohol is a diuretic — it makes you flush out fluid you just spent miles sweating away. Studies show that drinking after exercise actually delays rehydration and reduces the plasma volume your heart depends on to move blood efficiently.3 You finish a hot Saturday long run already down a couple of pounds of water, and the beer that’s supposed to replace it pushes you further into the red.
Try this: This is where my Garmin became my truth-teller. The mornings after one or two beers, my resting heart rate sat five to eight beats higher than normal. Check your morning heart rate after a dry night, then after a couple of drinks. The number doesn’t lie, even when we want it to. And if you’re doing low heart rate training, that drift makes it almost impossible to hold your aerobic pace below 130 bpm the next day.
#3 - Alcohol Steals the Recovery You Only Get While Sleeping
If you take one thing from this piece, take this: the single most powerful recovery tool you own is sleep. And alcohol is sleep’s quiet thief.
A nightcap feels like it helps you drift off. It does — at first. But alcohol suppresses REM sleep, the deep, restorative stage where your nervous system repairs and your body does its real rebuilding.4 You sleep, but you don’t recover. One athlete I read about put it perfectly: one night of drinking can cloud three days of training.
My mentor in this work, Dr. Phil Maffetone — the man whose low heart rate method brought me back after my heart attacks — has said it plainly for years. When he coached athletes one-on-one, he had them list every stress in their lives in three columns: physical, biochemical, and mental. Right at the top of the biochemical column, alongside too much caffeine, he wrote one word: alcohol.5 Stress is stress, whether it comes from overtraining or from a bottle. Your body can’t tell the difference, and it can only absorb so much before performance and health both start to crack.
There’s a longevity layer here too, and it matters most to us. The endurance we’re chasing in our 60s and 70s lives in our mitochondria — the tiny power plants in every muscle cell. Lifelong endurance athletes studied in their 80s showed mitochondrial function that looked decades younger than their sedentary peers.6 That’s the real prize: not just a faster 10K, but a body that keeps running for another 20 years. Alcohol works directly against the cellular machinery we’re trying so hard to protect.
The Bottom Line
Alcohol isn’t a moral failing. I’m not here to preach — I drank my way through 70 ultras. But I won’t pretend it’s free anymore, because it never was. That finish-line beer charges you on three accounts: it robs your repair window, drains your fuel and fluids, and steals the deep sleep where recovery actually happens.
You don’t have to quit cold turkey to win this one:
Skip the drink in the recovery window right after a hard effort.
Swap the post-run beer for a protein shake and water.
Watch what your Garmin tells you the next morning.
Small changes, big returns — the kind of trade a longevity runner makes every time.
I’ve actually switched to drinking NA beers. They’re not that bad, now available everywhere, (so you don’t miss your friends at the pub) and no after effects on your metabolism, recovery and driving!
Imagine showing up to next Saturday’s long run with a full tank, a quiet resting heart rate, and a body that slept the way it was built to. That runner is faster, steadier, and still toeing the line decades from now. That runner is you — if you decide the next 20 years are worth more than the next drink.
Because here’s the truth I’ve staked my whole second life on: we are Not Done Yet!
Which costs you more — the drink in your hand, or the runner you could still become?
What’s your relationship with alcohol and your running? Hit reply and tell me — I read every one.
Have a great week!
-Herb
Run Smarter, Live Longer
P.S. Ready to go deeper?
The Forever Runner Method is a proven, step-by-step framework built specifically for runners over 50 who are tired of getting hurt and are ready to run smarter. If you want to discover how, Grab a copy of my book at Foreverrunner.com.
Evelyn B. Parr et al., “Alcohol Ingestion Impairs Maximal Post-Exercise Rates of Myofibrillar Protein Synthesis Following a Single Bout of Concurrent Training,” PLoS ONE 9, no. 2 (2014): e88384.
Louise M. Burke et al., “Effect of Alcohol Intake on Muscle Glycogen Storage After Prolonged Exercise,” Journal of Applied Physiology 95, no. 3 (2003): 983–990.
Ronald J. Maughan, “Alcohol and Football,” Journal of Sports Sciences 24, no. 7 (2006): 741–748.
Irshaad O. Ebrahim et al., “Alcohol and Sleep I: Effects on Normal Sleep,” Alcoholism: Clinical and Experimental Research 37, no. 4 (2013): 539–549.
Philip Maffetone, The Big Book of Endurance Training and Racing (New York: Skyhorse Publishing, 2010).
Scott Trappe et al., “New Records in Aerobic Power Among Octogenarian Lifelong Endurance Athletes,” Journal of Applied Physiology 114, no. 1 (2013): 3–10.