Really wish I had pulled the trigger on the versa climber I saw on craigsList last year. I am really interested to read and try to understand why a rower doesn't work. I think based on what Donald posted I get it but... rowing sucks over 20 minutes if done at the right intensity. I can see that you pull hard then no tension then pull hard again but my heart rate is definitely not falling during that period of moving forward.
What we think, or what we know, or what we believe, is in the end, of little consequence. The only thing of consequence is what we do. -John Ruskin