These are considerations when buying a treadmill online:

Check to make sure treadmill is a name brand, backed buy independent ratings and reviews. Also, check for customer testimonials, if available.

Make sure when buying a treadmill, it is built with quality components. Like computers, treadmill manufacturers built using similar parts. Make sure that parts are reputable and that overall construction meets or exceeds standards required for your needs.

A warranty says a lot about quality of a treadmill. Companies are not going to offer an exceptional warranty if machine tends to breakdown in a short period of time. Warranties are a consistent factor in quality of a treadmill. If warranty is exceptional then it makes sense that treadmill is built to last. Make sure you buy treadmill that comes with a reasonable in-home repair warranty. A one year repair warranty is a good indication. If you plan to buy a budget treadmill consider an extended warranty.

Make sure your treadmill is backed by exceptional customer service. Treadmills are complicated pieces of machinery. They do break. Whether if you buy online or at a retail store, make sure company has an excellent customer service record. Online company reviews can be found at Shopping.com and BizRate.com.

When buying a treadmill do not get caught up by salesperson. Do your research. Compare prices, features, reviews, ratings and warranties. That will give you a good indication on what to buy whether online or off.

Don't forget to breathe. By holding your breath during even a single repetition of an exercise, you are depriving your body of valuable oxygen and experiencing muscle fatigue much sooner.

Muscle Isolation. Try to isolate muscles when you are working out. Most exercises rely on secondary muscle groups. For example on pull downs for back, arms can tire before your lats do because they are much smaller muscles than your back. By concentrating on using lats to pull weight down you are effectively reducing work your arms are doing and placing workout on lats.

Each exercise that you may be doing may also have specific areas where bad form may result. There are many examples. If you are doing any type of chest press while lying flat on a bench make sure your lower back is flat on bench. Many people forget about this and end up curving their lower back without even realizing this and risking chance of a back injury. This is also true if you are sitting up for certain exercises or sitting on a bench with a vertical cushion. There is a tendency to slouch. Make sure you sit up straight and suck in your abs to keep your back straight. Other exercises require that you keep your knees slightly bent.

As a matter of fact, in every day life you should also be paying attention to how you lift things, sit, etc... This way you will avoid any nagging pains or aches. These body pains exist to tell you something is being done wrong to your body. You will also improve your posture.

Over time you may want to modify a certain exercise. Add some variations to more effectively or differently work your muscles.

These are just some of most important points to pay attention to when weight training. By paying attention to these points you will avoid any possible injuries and you will maximize potential from every single workout. And this is whole purpose of weight training. To strengthen your muscles, prevent injuries and know that a little attention to your health now will go a long way to your future well-being.

I run a couple of fitness websites: popularfitness.com exercise-fitness-programs.com