After watching a ‘con’ (send us you $$$$$$$ and we will tell you something you can get for free) video about exercise for older guys. Anyway on major ‘secret’ was High Intensity Interval Training, so I read a book about it by James Driver and put into practice tonight. Used the cross trainer 10 mins warm up, intense 15sec rest 55sec x 20 reps, warm down 5 mins and stretches.