I got a challenge and I can't say no to that. Can I perform 15 act-ups in 6 minutes, in a maximum of six sets? I love chin-ups, but maybe this challenge is too much for me. On the day of the challenge, I am dressed in leggings and a sports top and ready to start. I'm excited. My hands are shaking with adrenaline. The first set is surprisingly easy for me. My arms are strong, my biceps are tense and swollen, my form is perfect. With each rep, my strong lats stretch as much as possible and then contract strongly while lifting my muscular body towards the bar. I feel like my muscles are i... Show more