I walk about twice a week in a rugged outdoor setting with some climbs for 3 miles a time. I also try and walk as much as possible when in London - maybe 2 miles a trip and I go twice a week - so that's maybe 10 miles a week max. But is that really enough to be doing any good? When I walk in the countryside (on unmade tracks etc) it takes me about an hour to do three miles - is that too slow?
Would love some advice as my walking exercise is all a bit DIY at present!