From this Wall Street Journal article GE's Bob Wright Stays Strong By Lifting Weights Very Slowly:
“Workouts typically consist of one set of six to 12 exercises with little rest between sets…. trainers find a weight load that renders muscle fatigue in 60 to 90 seconds, and take clients through a full-body workout in approximately 30 minutes”.
Such a workout can be very demanding, but people or any age or fitness level can do this and benefit from it. Clients slowly build up to a level they can handle. It is an attractive alternative for thsoe who often don't have time for exercise.
Bob Wright is a very busy man. He serves as vice chairman and executive officer of General Electric Co. He injured his shoulder playing golf. To avoid surgery he began lifting weights to stabilize his shoulder. He got great results. Others with shoulder injuries have too.
One can live well without requiring hours each week engaged in monotonous exercise. Significant strength increases occur exercising as little as once or twice a week IF it's the right exercise program with the right trainer. The fitness trainers at Austin Personal Training and the fitness trainers at New Orleans Personal Training can guide you through a HIIT personal training program that will enable you to get more out of less time exercising.