[gruez]

Even if this is true, surely this wouldn't show up in the statistics until decades later? Going to the gym has little effect of whether you make it to 40 or 50, but it might make a difference between 80 and 90, but if all the gym going population are in their 20s today, that's not going to cause the statistics to shift.

[jscott0918]

If the 20-somethings today are substantially healthier than the 20-somethings 10 years ago, then quality statistics _should_ capture the effect.