Original sentence: Absolutely false.Apparently healthy people can still have unknown medical conditions, such as a heart murmur, that can cause severe injury or death not only to themselves, but also to others that are dependent upon them, such as someone they are spotting.Depending upon the type of exercise you are engaged in and the underlying cause of the pain, actual pain, as opposed to discomfort, is generally a sign that you are causing more harm than good (eg tearing a muscle).If this is the case you should seek medical advice.It is common to experience sore muscles the day after a workout following the start of an exercise program.It is uncommon to experience pain the next day after you have been engaged in a program for a month or more.Many common myths have arisen surrounding exercise, some of which have a basis in reality, and some which are completely false.No Pain No Gain.Only a physician can determine your ability to engage in an exercise program.Only overweight people need a physical before beginning an exercise program.Pain at these times can indicate a serious condition that requires immediate medical attention.This is due many microscopic 'micro-tears' in the muscle and possibly metabolite build-up, and is known either as Post Exercise Muscle Stiffness or Delayed Onset Muscle Soreness (DOMS).This is generally false.You should NOT feel pain during or immediately after a workout