<p>amesie: </p>
<p>My Schwinn Airdyne bike and a pair of 8 lb dumbbells from KMart were the first two piece of exercise gear I bought. The DBs are long gone, but the Airdyne is still going strong and will certainly outlive me.</p>
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<p>First things first, I think you have to decide what you want as the Airdyne is not really a conventional exercise bike in a couple of key ways:</p>
<p>1) Standard exercise bikes are legs only. On the Airdyne, you pedal like a bike and push and pull with the arms at the same time. While it is possible to just pedal or just use the arms, most of the time you’ll do both. Working arms and legs simultaneously is very challenging from an oxygen consumption standpoint. Going hard on an Airdyne will gas you very quickly!</p>
<p>2) Standard exercise bikes have variable resistance (usually with an adjustable magnetic force). So you press buttons to make it easier or harder to pedal. And, you will need to make these adjustments if you want to pedal faster or slower. The Airdyne has zero adjustments. The front wheel is a fan. So you are pedalling against the wind resistance of the fan. When you pedal faster, the increasing air resistance automatically increases the resistance of the pedals. Pedal slower and the pedaling gets easier, automatically. No adjustments, no settings. Ever. </p>
<p>3) Here’s the kicker: the wind resistance increases with the square of speed. So when you start pedaling faster, it gets harder and harder very quickly. This makes the Airdyne the perfect exercise machine for intervals – workouts where you are alternating between short hard bursts and slow recovery periods. On a regular exercise bike, you’ve got to adjust the settings to pedal fast and hard and then adjust them again to pedal slow and easy. On the Airdyne, it is completely automatic. For a work interval, you just pedal faster and the resistance automatically adjusts. To rest, just pedal slower and the resistance automatically gets easier. All automatic, regardless of whether you want to do short 10 second ultra high energy intervals or longer 2 minute moderate intervals. This is why Airdynes are so widely used for sports training and really good fat loss programs.</p>
<p>4) For just long slow easy cardio, either type will work. On a regular bike, you just set it and pedal. On the Airdyne, you just pedal slow and easy. One characteristic of the Airdyne is that it is incredibly smooth – like pedalling a very expensive high end exercise bike with a huge flywheel. Very easy on the joints.</p>
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<p>If you decide to go with a regular exercise bike, there are three options: upright standard bike, recumbent sitting bike, or spin bike that is like a road bike. Personally, unless you’ve got some physical issues, I wouldn’t get a recumbent. The whole point of exercise is to counteract the effects of sitting all day long, so it doesn’t make much sense to get an exercise machine where we are sitting in a chair. If you ride real bikes, then a spin bike probably make sense as it’s going to be training for the road bike.</p>
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<p>The difference between the two Airdynes is the difference between the pro/commercial gym model and the home version. The [AD6</a> Airdyne](<a href=“http://www.bodybasics.com/sites/default/files/products/71Qbdqmr8GL._SL1500__0.jpg]AD6”>http://www.bodybasics.com/sites/default/files/products/71Qbdqmr8GL._SL1500__0.jpg) is the current version of the commercial quality Airdyne that has been in production since the 1970s. This is the new version of the Airdyne I have and the one that NFL teams and top gyms use. Very heavy duty, like a $5000 treadmill compared to a home model. For home use, it will last literally forever. It won’t be one of those throw-away exercise machines that’s falling apart in three years. in fact, there’s quite an active market in 20 and 30 year old Airdynes. The [AD2</a> Airdyne](<a href=“http://ecx.images-amazon.com/images/I/71Eo90pjP0L._SL1500_.jpg]AD2”>http://ecx.images-amazon.com/images/I/71Eo90pjP0L._SL1500_.jpg) is the new inexpensive home version that was introduced a couple of years ago. It’s functionally the same, but lighter construction and a lot of plastic parts. Airdynes are so cheap compared to most high end exercise machines, that I would definitely buy the $550 AD6 over the $320 AD2 if I were buying one today.</p>