If you're riding for an hour, you need more resistance. I ride a Lifecycle every day for 45 minutes, and I can assure you, it's plenty. I cycled competitively for years, and am fairly fit. Target your heart-rate to train the most effectively. Running is great for folks with no knee/ankle/back problems, and I incorporate a 2 mile run into my training. You use different muscles when you run, and it is tougher over-all. '01whitecobra (aka Bitter old Fawk), is knowledgeable about running, so you might PM him with questions.
CHL holder and Conservative...AKA "Domestic Terrorist"