I lived at 10,600 feet for 6.5 weeks last summer, coming from essentially sea level.

I felt like I was adjusted 90% adjusted about 2 weeks in, like I could walk at a normal speed. My Garmin watch agreed with this adaption. However, trying to mountain bike with the locals was hilarious... even at week 6 I barely started to be able to keep up on climbs. I rode my mountain bike nearly every day, or at minimum took a several mile hike

Near the end I had a bender with some coworkers. I started developing a persistent "altitude" cough after that that never really went away until I got back down to sea level. The cough disappeared in 36 hours. And wow, did I feel like superman when I got back racing my peers.

Did you catch the important point in my story though? I live an active life style at sea level, but man, people living in small towns in the mountains _love_ the outdoors. We were active every day of the week: riding, hiking, climbing, etc. I could definitely see how altitude helps with cardiovascular health, but it's already been proven that leading an active lifestyle is one of the most amazing things you can do for your health and happiness.

> people living in small towns in the mountains _love_ the outdoors

You have to. There's no activities besides outdoor activity and drinking and almost every other aspect of living in the mountains is more difficult (versus a normal, big city in a more hospitable terrain and climate).

When I lived in the mountains everyone was either there for the activities, or was a drug addicted hospitality worker there because they couldn't find jobs in cities.

> And wow, did I feel like superman when I got back racing my peers.

Huh, interesting. A friend of mine moved from sea level to ~6000 ft a few years ago. She said it took her a bit of time to get used to running at the new altitude, but eventually felt as comfortable with it as she had down here at sea level. I asked her if running feels easier to her at sea level now, when she comes down the mountain to visit, and she said it doesn't; it's basically the same as it used to be when she lived here.

Maybe the extra 4600ft you went up to made a difference in that, and of course everyone is different, but that's still interesting to me.

Mountains are objectively aesthetically pleasing to humans. They also retain the most wild and specific nature around, especially in western world where in the past mostly agriculture changed environment forever. You can find entire states in Europe where 'wilderness' is basically a well curated park that was a field some time ago. Air is much cleaner, you see far and you feel utterly insignificant up there.

Mountains also allow tons of various sports most of the year as you mention and attract such crowds.

Overall, people go in droves to mountains every year, summer and winter, to recharge. And its a different recharge compared to some beach holiday, much more active and I dare to say a more effective one (active vacations simply recharge better mental tiredness of modern living and working).

I live near Geneva, Switzerland and after moving here basically became mountain sports addict. Hiking, ferratas, climbing, a bit of alpinism in non-winter, and skiing / ski touring in winter. For exotic places there is diving to keep a bit of balance. Did also some paragliding too but had a nasty accident last year that almost killed me so stopped that. Rest I continue, and will do till the last moment I can still do them, they make me properly happy like a toddler. I live in best possible place in the world for people like me, 1h drive from home and I am right below Mont Blanc, towering almost 4km higher than Chamonix valley.

One drawback as you mention - higher mountains are basically high altitude deserts, snow and ice everywhere but humidity easily below 5% ie in Himalaya. Many folks trying ie Everest didnt get higher than base camp simply due to being often sick up there, amateurs and pros alike.

I was thinking there's probably a correlation between high altitude living and getting exercise which may explain the lack of hear attacks. My main high living experience was the Everest area like Namche Bazaar and there are no roads or cars so everyone walks.

I had that exact feeling when I visited denver, many years ago when I was doing triathlons. I woke up the next morning, went to the gym to do a 1 hour bike threshold session, and started panting for breath within the first 10 minutes of warmup. I was like, what-the-heck?

Then I remember Denver was the mile-high city.

Thanks for the marvelous story!

out of curiosity, Leadville?

> it's already been proven that leading an active lifestyle is one of the most amazing things you can do for your health and happiness.

For your health sure. But for happiness, only if you actually like sporty activities. I don't, and it feels like a chore. Having to do chores all the time makes me unhappy. I've always hated anything to do with sports.

In think some people get an endorfin hit from it but for me that doesn't do much either. I just feel empty and exhausted after it.