Pull-up bar exercises provide excellent returns on investment when it comes to physical activity and strength training. They should be a must in everyone's fitness playbook, whenever possible. Plus, being able to lift your entire body weight, whether it's pulling yourself up as you are about to drop off a cliff or climbing up a jungle rope Tomb Raider style, is as badass as it gets. Pull-ups "To Failure" aka your "Maximum" here can be anything from 0.5 to 30 pull-ups, whatever you can do at any given set - just do your best and your best will improve overtime. The same goes for push-ups. As you perform hanging knee-ins with a twist, tighten up your core and bring your knees past your waistline.
Extra Credit: Do a minimum of 20 push-ups per set.