This is a sneaky myth because most people know that in order to see results from a workout, you have to apply an overloading stimulus to the muscle cell. An overloading stimulus is defined as something that pushes the muscle’s boundary, creating microtears so that the muscle is forced to grow back bigger and stronger once rest is given. In other words, working the muscle to failure.
The problem with this is that while you do need to push a muscle to failure to see results, you don’t need to do it during every session. If you start giving 110% every time you’re in the gym, you’ll more than likely suffer from overtraining syndrome within a few weeks and you’ll be sidelined for quite some time. Then you’ll have plenty of time to recover because you could be out for weeks or months if the condition is severe enough.
The key is to develop a program that allows you to work a muscle to failure, but also incorporates a couple sessions per week that are done short of failure. Don’t forget to include a few days of complete rest.
Furthermore, if you’re on a low-carbohydrate diet, you may not want to work a muscle to complete failure as you risk depleting it of all its muscle glycogen stores. Unless you have planned large “carbups” after each workout, over time your body will become fully drained and you’ll no longer be able to perform your workouts.