Push-ups are a great way to target the upper body and can be adapted in a number of different ways. You can do these on the floor either on your feet or with your knees down to make it easier. You can also do them standing up with your hands placed on a table or maybe a window sill. Place your hands wide and slowly lower your chest between your hands and push back up to the top. You can also do the same move but with your hands shoulder width apart and as you lower your body make sure your elbows are squeezing in towards you.