New to exercise? Returning after a hiatus? Try this class first to ease you in. TRX or Total Resistance Exercise training was developed for the NAVY Seals to enhance performance and surpass fitness plateaus. These iconic yellow and black suspension straps hang from the ceiling, and that's where you will be doing all your work. TRX utilizes vector, the element of bodyweight as resistance. Keep your core tight and your hips tucked as you hang from your arms or feet, pushing the floor away with you with perfect balance and perfect form.