Most of the studies done about the benefits of quick, intense workouts involve interval training and aerobics. As news spread that you don’t really need an hour or more a day to get fit, classes such as HIIT (High Intensity Interval Training) became increasingly popular. Improve Strength now!
A study published in the Scandinavian Journal of Medicine & Science in Sports has proven the same thing for strength training! Only three seconds per day of resistance training can improve bicep strength by 6 to 12%.
