These guys probably aren't really working all that hard. If you have time to read emails and surf the web then you should exercise harder. True if you’re doing

These guys probably aren't really working all that hard. If you have time to read emails and surf the web then you should exercise harder. True if you’re doing cardio exercise. If you’re doing some kind of weight program for strength / muscle building then you get best results in terms of results achieved / time expended (according to r/bodyweightfitness & r/fitness FAQs) by resting for 5 minutes or so in between each set of an exercise so that your muscles can replenish their stored energy reserves. You can use some of that time to do a different exercise, but you probably still have some downtime left: The r/bodyweightfitness program leaves 90s inbetween each set of paired exercises. That’s time to read a few emails, surf the web etc.