ok bud
its hard when your drivin all day for living...do you stay away a lot or not...if not can you swim?? brill for all over body conditioning go straight after work 30 mins in water ....as to lengths,,if you can only do a couple dont worry rest then do another...just try to add one length every week before 1st rest...so if you went in week 1 done two lengths then rest then next week do 3 then rest...after a while you will build up till eventualy you can do 30 mins no rest...those cereal bars can be full of hidden sugers/fats but if your eating like you say that shouldnt be a prob...i think its more the likley your lack of excecise...if you go straight from work to pool ..it will become a routine(you will prob find it quite refreshing) where if you go home first it can be hard to motivate yourself after hard days work...