[lkuty]

Walking fast with a steep slope is a good way to exercise I think. Andrew Weil even wrote that walking is a complete form of exercise: you don't need anything else to be a good athlete. But I guess it is a long hard walk, not a short easy one. I walk regularly and I found that it was really demanding if I do that in the woods with regular slopes. And sometimes I run a little bit, alternating walk and run.