1. Push-ups – you might not think much about push-ups, but try doing 100 or more in a single setting. These use your own body weight in order to help work your shoulders, chest, and even parts of your back 2. Dips – if you have a chair (or even with a bed or couch), you can put both arms on the seat and dip your body down to the ground. This will help work your tricep muscles with a simple exercise. 3. Lunges – in order to work on your lower body, make sure to do some lunges both forwards and backwards. You can put something in your hands to weigh you down a bit as well. 4. Planking – while laying on your stomach in the form of a plank has grown popular, there is a much older planking exercise. Hold your body weight up on your forearms while in pushup position for 90 seconds at least twice. With this workout, you’ll be able to break a sweat, stay in shape, and work all the necessary parts of your body in a quick and convenient routine. Inspiration: The 20-Minute Hotel Workout [Nerd Fitness]