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Push-ups, planks, bodyweight squats, and lunges can be done literally anywhere. But pull-ups require something to hang from, and that won't always be available. If you travel a lot, you know that it isn't easy to find a gym. If you're lucky, the hotel you're staying at has a gym, but you'll have to be real lucky for that gym to be equipped with a pull-up bar. But there's still a way you can do pull ups. All you need is a door and a couple of towels. Just follow these steps.

Step 1: Tie a knot on one end of each towel. Make sure it's tight.

Step 2: Hang both towels over the door. The knot should be on the inside of the door when closed.

Step 3: Close the door so it latches. Make sure the towels are laying flat enough on top of the door to get it to close.

Step 4: Use the towels to do pull-ups. Your body will slide up and down the closed door.

As a bonus, towel pull-ups really hit your grip and forearms hard. Find yourself a set of towels or rags made from a thin material and keep them in your suitcase. And never skip your pull-ups. – Drew Murphy