thats:
1hr X 365days in a year X 50 years = 18250 hours
hm... 18250 hours... well that's:
18250 total hours worked out over a lifetime /24 hours in a day = 760 days
and 760 days / 365 days in a year = 2.083 YEARS spent working out!
so.... unless you are adding more than 2.083 years (the time you lost working out that you could have been doing other things) then you are actually losing ground.
Always keep the time lost in mind when it comes to working out and the gains you supposedly get from it.
also keep in mind that the time gained includes time asleep, while the time lost working out is lost from your waking hours.
and .... the time added is added to the end of your life, while a good chunk of the time lost is taken from your youth.
is it really a good trade to get an extra year or two at the end of your life in trade for time lost during your prime?