Do we always have great fear of getting tired? Any energy spent is not lost forever. We plan our fatigue the same way we plan everything else. We ‘save energy’ to work out at the gym, there too we time ourselves, count repetitions, track the heart rate.
These days people wear those wrist bands which shows how much they slept! If you wake up and feel fresh then you slept well… Similarly if you feel like working out in the morning and then again in the evening then go for it! Some days you might have a lot more energy than your already set goal of X steps (which can be set on the wristband) and on some days you might have to drag yourself to take even one step ;-), Why let a machine decide for us how much we should do? Why not just go with the instinct?
We definitely need to stop robotic routines and move around, run, walk, do Pilates; Yoga, go biking, climb hills, jump, dance… There is no rule how many times or how much to do. Just do it as much as you can… because really you can!