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This site: http://www.fitsugar.com/Tips-Using-Rowing-Machine-3019487, offers you a great resource for tips for using a rowing machine if you are a beginner.
Here are the best rowing machines for small spaces: Best Overall: Sunny Health & Fitness SF-RW5801 Best Compact: Concept2 Model D Rowing Machine Best Budget: Sunny Health & Fitness SF-RW1205 Best Portable: Sunny Health & Fitness NO. 077 Rowing Machine When choosing a rowing machine, think about the size, weight, storage options, and resistance systems. Be sure to read reviews and do your research before making a purchase
3FatChicks.com offers a great resource as far as 3 interval training workouts for the rowing machine: http://www.3fatchicks.com/3-interval-training-workouts-for-the-rowing-machine/.
If one is looking for a video to demonstrate how to properly use a V fit rowing machine, the best way is YouTube. There are thousands of workout videos available for viewing.
On Amazon.com , you can sell your used rowing machine, given it is in a great condition. Faster options are on eBay.com or an ad on Craigslist.com , however, you should expect to sell it at a lower price.
craigslist, ebay.com, amazon.com check out classcifieds in your area. htt://http://buyrowingmachines.com should be your best bet for a cheap rowing machine to buy.
To get a Kettler Kadett Outrigger Style Rower Rowing Machine one could try online sites like: Amazon, Ebay, Overstock and Best All Price Sport Fitness.
The best place for purchasing a Kettler Rowing machine is on Amazon. They have clear descriptions and Amazon will fight your battles if the seller doesn't send you your product. Another place is eBay if you want to buy one cheap or find a bargain.
Row, row row your boat? ;) (Sorry, couldn't resist)
concept 2, c model is quite good and usually cheap on Ebay. Or look on the concept 2 website.
I have been in this situation myself and I believe that the best a low impact cardio excercise with a smooth rhythm like a bike or a rowing machine would work.
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