What's interesting about this study in Swedish women is that if you look at the results section the high sun exposure group has the highest disposable income and most years of education. Low exposure has the lowest disposable income and least years of education. Probably because for Swedish women high sun exposure means travel which is expensive.
It's hard to say if the study measures sun exposure or the ability to stay healthy with a higher income & better education.
I tried swapping running with cycling for a few months but honestly as somebody who spends a good portion of my time on my ass, often with suboptimal posture in front of a screen I hate the idea of exercising still sitting on my ass with bad posture.
The most important thing imo is to find a form of cardio you enjoy. It's not worth stressing over the differences between forms of cardio just find something you like and make it a part of your lifestyle.
Reagarding knee injuries, sure intense running with bad form is more likely to get you an overuse injury but those heal quickly, long term studies don't show increased knee/hip risk for runners.
Strength exercises are also very important for runners. Getting all the muscles arounf your hips, knees and ankles stronger significantly reduces the chance and severity of injuries and has a ton of other benefits.
RETH* is one of the open source implementations of the Ethereum protocol. Around 2% of Ethereum nodes run it today.
Historically, there have been hundreds of blockchians that were basically slightly modified forks of Ethereum clients, operated by a small group of validators that sacrifice decetralization in order to achieve higher throughput. This seems to be a slightly higher effort verson of that.
It's hard to say if the study measures sun exposure or the ability to stay healthy with a higher income & better education.