Sometimes those who train with the best intentions can undermine their own progress with these five common exercise mistakes. Not getting the results you're hoping for can be frustrating and confusing.

So what makes one training plan successful and the other not? There may be several factors involved. But in many cases, the cause can be traced back to one of these five errors. If your exercise plan does not produce the expected results, check if you are making one of these common mistakes in training.