skreecheboy, because you play football, walk & cycle dosen't mean anything, every Cig you inhale is damaging your internal organs {lungs} by the day, no amount of fitness will slow this process down, only giving up smoking would be of benifit, i read something not to long back that said the average smoker loses 10 years off his/hers life expectancy, tho some people are an exception to the rule, a friend of mind whos just turned 50 has got serious lung problems caused by smoking, he looks like he's 65 years of age, i hope i'm wrong but i'll be surprised if he's still alive in the next 2/3 years, he realises he's killing himself, but puts it down to an addiction and ones life luxuries which i do understand.
Ps, he always talks about his son ie he's very proud of him for not smoking, hes just past his driving test & just got engaged, lets hope hes around to see his only child get married in 2 years