Walking is my thing. I used to be pretty good at it. Along roads, across fields, through woods, up hills, along ridges - it's only being overweight that has reduced distances over last few years. However, walking further and more regularly will essentially become my maintenance plan after goal.
To be honest, once you get going, it's actually better walking now, and in the Autumn, than in late-Spring or Summer. If you set off on a walk at this time of year it might seem chilly at first, but if you are walking with sufficient purpose - (a good steer - you should be able to talk, but not hold a conversation) - then you'll soon get the heart and lungs pumping. Before you know it you'll be wanting to shed layers, and thinking back to when you were cold at the start of the walk.
When incapacitated for any reason, then a short walk around the block at the best pace we can manage, is a much better idea than a longer stroll. That's why step counters can be a bit misleading in some cases. If any exercise is an improvement over total inactivity, then of course any steps we make are good. But really it is the steps that raise our heart rates that actually deliver real benefit, not the ones that just generally record our routine movements from A to B to C during any given day, dropping children off, doing the shopping etc.
for snacks. 
Keep it up. Im already looking forward to the spring and summer walking. Much more pleasant in the warm x
