i know this guy in town whos like 50+ years old but hes a personal trainer...he rides a bike everywhere and ive seen him climb hills like nothing...he tells me he can easily do 20mph+ for more than 3 1/2 hours without breaking a sweat... how long will it take me to get into this condition if i diet and do some really hard biking for at least 30 minutes a day?

he also said he was in 56 iron mans/ triathalons and was a professional road cyclist when he was younger...he also said he won many tournaments within the top 3 places....

one thing he told me though is that it takes at least 4 years to get into his condition...is this true? he says that he doesnt even feel tired after 3 1/2 hours and says he can easily do 100 miles in 4 1/2 hours and then go on all day at a nice cruising pace of maybe 14 mph after that for about 10 hours straight...of course with breaks for food and stuff