Progress beyond basic push ups and keep your routine interesting with these challenging variations. Push ups are an excellent upper body strength and core stability exercise, that you can do anywhere, without any equipment. If you are struggling to complete full push ups from your feet, start with the first variation in this video- half knee push ups- and you will see your strength increase quickly! To improve your push up strength and stamina, complete 1-2 variations, 3 days per week 10-20 repetitions. Train smart, work hard, get strong!