Anyway it was very entertaining and enlightening.. a great example of making the science accessible (Horizon is so good at this).. The nugget of science based wisdom in this programme was captured in Michael Moseley's summary - 'If I can keep off my bum and keep moving and I do 3mins of intensive exercise a week, I will be much fitter and healthier. Never sit for longer than an hour otherwise the body idles and the gunk builds up.. So I'm going to try to act on this (knee injury permitting of course). And I have kept the programme to remind me or perhaps re-motivate me when I need it.
One week on, I now realise that this is not going to be easy with a sore knee, but I try to get up off my bum and hobble around and I am spending an hour each day in the woods picking up fallen branches and tidying the pathways. So gentle exercise is fine but so far I haven't managed to do any serious intensive exercise - the one minute bursts recommended in the programme, so I still have quite a way to go before I achieve this change.