Overlifting during your workout routine or placing immense pressure while performing a movement can lead to muscle strain. While sore muscles happen when you carry out a new workout or engage in powerful exercise for a more extended period. It is important to know the difference between no pain, no gain, and just plain pain. Either way you need proper rest and need to give time to your body to allow your muscles to repair and grow bigger. Why? Because your muscles demand time to heal and rebuild themselves. Both can be extremely painful and bring discomfort in everyday life as it takes at least 24 hours to return to normal.