30 Minute Dumbbell Workouts Reviews & PDF Download. 30 Minute Dumbbell Workouts to the rescue! This style of training is based on years of research and working through a multitude of programs to find what works and what doesn’t. The athletes that I have worked with each have their own process to achieve peak performance, and are constantly perfecting their methods. From training progressions to scaling (manipulating the workout tools to imitate the experience of the athlete), periodization (organized training approach involving progressive cycling of various program aspects during a specified period of time) to recovery, I have truly seen it all. And, even if you don’t consider yourself an “athlete”, or professional fitness guru, you still want to achieve maximum results for your efforts.