Exercising without equipment can offer both the ability to increase strength endurance and cardiovascular improvement simultaneously. This form of full body exercise is a great way to create variety in a weekly exercise plan, while also offering an option for vacation travel, when exercise equipment may not be available. Prone Plank Rotations Assume a prone plank position on a mat with feet shoulder-width apart and the arms at 90-degree angles at elbow - forming a triangle. While contracting the core and maintaining a spinal neutral position, begin rotating your hips to the left and right side – passing through the start position while in transition - using the forearms and shoulders to prevent sagging at the hips. Try 3-5 to each side.