I did nothing till I was 48... then I joined a gym ,and for the first time took an arobics class. We had to run, I couldnt make it 1/4 mile. I was ashamed ,and didnt know why I couldnt do it. After about 3 months of running 2 miles a day I quickly upped it to 5,6,7 miles 1 year later ran the Marathon...injured myself ,and bought a bike. Maybe thats why Im having trouble with balance ,and clipless. Im very un coordinated ,but its fun trying.