Rowing machines help strengthen your arms, legs, shoulders, and back with very low impact. However, it is not advised to people with back problem and even those with healthy backs are cautioned as it can strain muscles from rowing. Rowing machines have different types of resistance. Standard rowing machines use air resistance, other models use a water flywheel which is more closer to real rowing, and still other models use pistons or cylinders. However, most of us have fast-paced lifestyle which makes it difficult to insert physical activity into our busy schedules. Having cardio exercise equipments at home could resolve that issue. Signing up for an expensive gym membership may not be good idea if you are a person who dread walking to a room full of people and wait for you turn on the next machine. Don t just check one website and stick with it. Online shops are becoming so competitive, prices tend to be lower that actual fitness stores. If you have decided to purchase from an online store, then you would need to consider about the shipping cost, warranties and of course, service agreements. Check the warranty and return policy. Choose cardio exercise equipment that feels very right. Take note of the impact brought about by such machines. If you have lower back problems, it is definitely not a good idea to choose a stationary bicycle over a treadmill. Always bear in mind that in choosing and buying the tools, it should not be about the cardio exercise machine. Second, the exercise machine should not exacerbate any physical discomfort or problem. Everything should be taken in moderation. The statement is applicable in the use of cardio exercise equipment. If you are performing a single motion for numerous times in hours, you would definitely achieve muscle imbalances. But unlike the normal bike that riders use you do not actually move from your original position. This bike is constructed with a solid back inverted T-frame attached firmly to the ground. The front wheel is hanging some inches off the floor so that you can freely move the pedals. This workout machine is designed to provide a low impact workout.