Naturally, if you walked up to anybody at your local gym and asked them if they would like to learn how to get a six pack in 3 minutes they would probably jump at the chance. Of course, everybody believes such things to be nonsense. However, if you're looking into how to build muscle you are about to discover why HIIT can produce very good results in less than half the time of regular resistance training.

Gone are the days when people need to spend hours working out in the gym after a long, busy day at the office. Nowadays you can get great results in as little as half an hour. []

The trick to building more lean mass is variety. Couple it with intensity and you have a winning formula. Variety can mean something as little as changing how many repetitions of an exercise you perform or changing the order in which you usually workout. Small, subtle changes will shock the body into pushing beyond the plateau it gets itself into over a period of time.

Most gym users hit a plateau due to a lack of variety within their program. This comes from doing a program that works initially and provides good results, causing the gym user to want to stick to it, only to find that results begin to slow down over time. It doesn't mean you are no longer working hard in the gym, it simply means your body has adapted to your program, it knows what to expect.

So the first step here is to ensure you never repeat the exact same workout from this point forwards. Even if the changes are quite small, they will still generate fresh progress.

Intensity levels are often misunderstood. No, increasing your intensity in the gym does not simply mean blasting through exercises at maximum speed. You should never sacrifice good lifting technique for anything, no matter whether it's more weight or more speed. Intensity means keeping your rest periods to a minimum, that's all.

With minimal rest times and new, challenging exercise routines each time you hit the gym you will feel a new lease of life.

Here is an example of what a high intensity routine would look like for the midsection: []

* Leg Raise

* Plank Push Up

* Plank

It might look easy on paper, but it is not to be underestimated. Try moving from exercise-to-exercise with 30 seconds on each movement and no rest at all. Take a 60 second breather at the end of the circuit and then start over. Two rounds would only take 3 minutes, but it will really test your fitness levels.

The workout above will effectively show you how to get a six pack in 3 minutes at home every day. If you were to keep doing it, however, you would simply adapt as we have already discussed. The trick lies in varying things when it become stale. You can also apply this style of training to any other muscle group, so if your goal is to learn how to build muscle in as little time as possible, then you have just discovered one of the most effective methods.