Nude? :) I do think getting a bit of sun everywhere has to enhance the benefits. Thus my solution.

I also walk a lot when I can and weather allows. I started walking with a weighted vest occasionally and it was like my body went into some kind of good shock. I was surprised how little soreness or fatigue I felt even the first time, after a two hour walk wearing 20 lbs. And the physical energy boost was dramatic. I switched to 40 lbs the second time and since.

Sure! Walk out of the sauna, over the garden, down the dock, then jump into the lake for a naked swim.

Do that daily for about four weeks, come rain or shine, whilst enjoying your summer vacation.

Of course that probably doesn't work for every country, but here in Finland it's normal enough. Too bad I'm a pale-skinned redhead, covered in freckles, and I get burned if I'm not too careful.

> I do think getting a bit of sun everywhere has to enhance the benefit

Why? This is not how we naturally insolate.

I’m not saying you’re wrong. Just that the status quo is different parts of your body getting sun each day. You’re not replicating that, which places the burden of evidence on you.

Depends where you live but where I am it's not unacceptable to go for a run in essentially swim wear so you'd be sunning not much less than what you'd get in a public tanning salon

There are tan-thru clothes, if you want to be serious about it.