A little late to the party but have you considered a mini pedaler instead? I just bought one so I could pedal away at my sedentary desk job and I absolutely love it. Yesterday I rode 6 miles. I feel like it keeps me energized at least!

http://www.amazon.com/Platinum-Fitness-Folding-Exerciser-Electronic/dp/B00P1ANC0E?ie=UTF8&psc=1&redirect=true&ref_=oh_aui_detailpage_o06_s00