From a fitness perspective, the WaterRower Classic works 84 percent of your muscle mass, helping tone and strengthen your muscles while burning far more calories than most other aerobic machines. The exercise is also low impact, as it removes all the body weight from the ankles, knees, and hips, but still moves the limbs and joints through a full range of motion--from completely extended to completely contracted.
Being able to easily store your rower is a huge plus. Make sure you investigate how well the machine stores, if it folds up or comes apart easily to be able to put it in your closet, or in other storage areas. As an example, the Concept2 Model D rowing machine folds up nicely by a simple pull pin located in the middle of the rower. Wheels on the bottom allow for easy moving.
Absolutely beautiful piece of functional furniture. I use this rower 3-5 times per week. The display is a little awkward and not nearly as advanced as the competition but for anyone short of a pro, it provides all the basic functions you could want. I've used plenty of rowers in gyms but this was my first purchase for home use. It was an excellent alternative to running outdoors in the winter and as an alternative to running when the legs need a little more recovery time. I have it set in the middle of it's resistance range and it is still plenty challenging. So there is a ton of adjustability in that regard. It's not quickly changed but for a single user device this doesn't matter. It's a different feeling than an air fan but I really like it.
On theme with C2’s interchangeability, models D or E are essentially the same machine. When we talk about one we’re talking about both. The Concept 2 E is just 8 pounds heavier but is made out of stronger stuff all around — what’s plastic on the model D is aluminium on the model E, and what’s aluminum on the model D is welded steel on the model E. The only noticeable variations are seat height and display position.

With magnetic rowing machines, adjusting the resistance means varying the distance between a flywheel and one or more strong magnets. This is done either manually, using mechanical sliders, or digitally by the console controls. Like hydraulic rowers, magnetic rowing machines operate quietly and have a compact design for easy storage. Unlike hydraulic rowers, they can provide a smooth and consistent workout. It's a very different kind of feel to what you'd expect from an air or water rower, though. You still get a good workout, but it doesn't simulate the sensation of rowing in quite the same way.

Waterrower dimensions: 83'' x 22'' x 21'' / weight: 108 lbs (at minimum water level)built for home use and practically maintenance... free, rowing machine targets all major muscle groups (84% of total muscle mass) w/ excellent adjustable resistance levelsmade of kiln dried harwood for better wood strength and performance; has honey oak finish that goes well w/ other home furnitureboasts a patented water flywheel that mimics the natural dynamics of rowing yet suitable for users w/ joint concerns (chlorine tablet is available free of charge)enjoy 1 year manufacturer's warranty (upgradeable to 3-year parts while 5-year frame is free of charge w/ registration)comes w/ the s4 performance monitor for quickstart of functions and displays intensity, kcalories per hour, strokerate, heartrate, and more!Storage dimensions: 21'' x 22'' x 83'' (easily store it on end)entry height is at 12'' (at 20'' w/ optional hi-rise adaptor)noise/intrusion levels: soothing and relaxing/minimal read more
Water machines are generally quieter than air rowers - you can still hear the water moving in the tank, but users tend to find this a pleasant ambient noise. Water rowers also tend to require little maintenance. Because there's a tank full of water involved, however, these can be very heavy, and larger than most other rowers: if you have a smaller home, a less-than-permanent workout space, or you move frequently, these might not be best for you. And because they're so high-performing, they do come at a high cost.
The distinction between rowing and other forms of water transport, such as canoeing or kayaking, is that in rowing the oars are held in place at a pivot point that is in a fixed position relative to the boat, this point is the load point for the oar to act as a second class lever (the blade fixed in the water is the fulcrum). In flatwater rowing, the boat (also called a shell or fine boat) is narrow to avoid drag, and the oars are attached to oarlocks ( also called gates ) at the end of outriggers extending from the sides of the boat.[8] Racing boats also have sliding seats to allow the use of the legs in addition to the body to apply power to the oar.

As with any fitness activity, it’s important to exercise with proper technique, however. The big muscles in the legs are where most of the workout action should be. Injury to the lower back can occur from bending too far forward in the row. It’s best to maintain a upright 90 degree angle to the rowing machine’s seat and slider bar. Using the legs for the motion rather than relying as heavily on the back or arms can help reduce the chance of muscle pulls or other related injuries. Always check with a physician before starting any new fitness regimen.
The rowing machine itself is unlike any other on the market with its patented water filled flywheel. It is hard to exactly copy the action of a scull on the water, but the mechanics of the flywheel spinning in water comes in a close second on dry land. The fact that the water is 800 times denser than air means that there is no need for any extra resistance or dampening that you will find in normal air rowers. The faster you pull, the more resistance is generated giving it infinite variability. However, if you want to be able to practice rowing with a faster stroke, you will have to reduce the amount of water in the tank unlike an air rower where you just have to adjust the baffle.