This HIIT workout will leave you fit and out of breath

In The Know: Fitness is a series of exercise videos hosted by personal trainer, Jeremy Sry, in which he demonstrates step-by-step workouts that are easy to do at home, at the gym and even on the go.

HIIT, which stands for High Intensity Interval Training, is one of the quickest and most garaunteed ways to see fitness results, whether you're looking for an improvement in your overall cardiovascualr health

Try this rigorous HIIT circuit if you're looking for a new and effective workout next time you hit the gym.

1. Burpees (3 sets of 45 second rounds)

Start in a high plank position and do a push-up. jump your feet in and jump up.

2. Dumbbell push-up to shoulder press (3 sets of 45 second rounds)

Start in a push-up position on top of the dumbbells. Do a push-up and then jump your feet in to a squat position. Shoulder press as you stand up.

3. Single weight mountain climbers to jump squat (3 sets of 45 second rounds)

Start in a plank position on top of your dumbbell. Begin doing mountain climbers. Jump in, squat and jump up.