sodaksooner
WKR
Find the tallest steepest hill in your area, throw some weight in your pack and hike up and down it for an hour a few times per week. I throw on some music and just get after it. It doesn't take long to start getting up and down faster and faster. Mine is relatively short so it's like doing intervals. I can do a full lap in about 3 minutes when i am in decent shape, so just enough time to get the HR back down and then hit it again. funny thing is another guy in town does the same thing and we run into each other occasionally. Fun to have someone to chat with while doing it.