Hmmmm......no such thing as a heart stroke - it's a brain problem
Fresh air? Does not exist in many areas, including places where lots of folks are riding bikes.
Weight bearing exercise? Cycling is not and does not protect against mineral loss that contributes to bone weakness
And left out the part about bicycling helping to maintain and/or improve a person's ability to balance.
But, buy some stuff from Deko and you will have a truly magical cycling experience. According to their website.
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Bacchetta Giro A20, RANS V-Rex, RANS Screamer