When we’ve only got five minutes to fit in some movement during the day, most of us will go for a sweaty, high-intensity, heart-racing workout. And more often than not, we neglect those simple but effective strength building routines that could be just as effective (if not more).
Article source: https://www.huffingtonpost.co.uk/entry/five-minute-isometric-hold-workout_uk_62b1c1ade4b0c77098b34a32