A weight-loss paradox?

OK. If you can burn 1,000 calories every hour walking up stairs, and you do this for about 3 and a half hours a day, you're losing 3500 calories per day. 3500 calories makes a pound. So, if you walk up the stairs for 3.5 hours every day, can you lose 30 pounds in a month by walking up stairs for 30 days?