Suspension training, which you might know as TRX, has been around for a while now, but trainers still swear by it for good reason: Sticking to a suspension training program long-term is likely to decrease your likelihood of cardiovascular disease, according to a study commissioned by the American Council on Exercise. Plus, the 16 healthy men and women involved burned about 400 calories per session, and saw significant drops in waist circumference, body fat percentage, and resting blood pressure while improving muscular strength and endurance over eight weeks. (Here's more on ACE's suspension training study.)

High-intensity interval training, or HIIT, is also a big deal right now. While a recent study found that there can be too much of a good thing, you should still incorporate HIIT into your regular routine to bank these health benefits.

That's why it's a solid idea to combine the two workout styles. "A TRX HIIT workout allows you to torch calories and build strength using your body weight, and [TRX straps] can travel anywhere with you," says Jason Tran, an instructor at The Fhitting Room and Swerve Fitness in New York City. "It allows you to work your core, arms, back, and legs without any extra equipment."

This TRX HIIT workout from Tran is great for those short on time: It's only four moves, it can be done in four minutes, and it'll blast your arms and abs. Just make sure your TRX is anchored safely before using it to support your body weight, and really focus in on engaging your core so you don't put any unnecessary stress on your back. (When you're done, you can try this military-inspired TRX workout or these Instagram-worthy TRX yoga poses.)