I am the king of 30-minute workouts. Why?
Because there was a point in my life where 30 minutes a day was everything I could save myself. During those two years my training had to be extremely fast and extremely effective.
At that time, I developed a style of training that would prove useful to almost any person I trained: the "Trinity Format"
Over the years, I have developed numerous "Trinity" trainings focus on other muscle groups and equipment. I call this "The Barbell Trinity", which allows you to achieve an incredible amount of size and power in no time. All you need is a few dumbbells, and you can work your whole body from head to toe.
Do you want more training like this? Look at the book Men's Health Maximus Body which is filled with pure muscle building routines.