your doing it right Rory, excersise keeping fit is a big part of benefitting your health for your later years,i was always energetic and fit even with my illness trials and at my best peak when i took up taekwondo at only 2 sessions of 3 hours each every week involving physical excersise / stretching, and sparing, if we keep fit we can fight any illnesses much easier with faster recovery, when older if your not fit enough to fight these things then you will hit a downward and slow recovery or no recovery at all, im not saying im ultra fit because im a smoker i know if i hadnt have been fit i proberbly wouldnt be here now,even at 70 yrs old my surgeon here said unlike most i am in perfect condition and would get through this easily, my mrs said to me i think she fancies you lol and i did even though i smoke , im a fighter im a survivor