You already know this, but sitting all day long is seriously not good for you. Sedentary behaviour is correlated to poor health and can increase your risk of developing everything from heart disease to diabetes and even cancer.

The good news is it's possible to break up all that sitting with small bouts of exercise – even if you don't have access to an office gym or your only option for exercise is at your desk. While these moves shouldn't replace a more vigorous workout routine, they can complement one. By regularly practicing this office workout, you'll avoid turning into an immobile lump during the workday.

Simple Exercises You Can Do in Your Office

You can approach these exercises in one of two ways: Combine them all into a circuit that you perform all at once, or incorporate them into your workday in small spurts, as time allows. If you're opting for the former option, aim to warm up with two minutes of walking in place, shadowboxing, jumping rope (with or without an actual rope), or a few minutes of walking around your office building before tackling the rest of the moves.

Stair climbing

Assuming you have access to a staircase at your job, here's a simple way to squeeze some cardio into your workday: Set a timer for as many minutes as you have (whether it's two, five, or 10, it'll still be good for you) and take to the stairs. If you're willing to get sweaty, run up and down as fast as you're able. If you're trying to avoid creasing your work outfit, you can still get your heart rate up by walking briskly up and down the stairs. Bonus points if you take them two at a time.

Pushups

If you have access to a desk or the floor, then you have access to a powerful workout for your pecs, triceps, deltoids, and more. If you already have the muscle mass to do regular pushups on the floor (and you have an office door you can close or co-workers who won't be freaked out by some in-cubicle exercise), then by all means do so.

Otherwise, you can perform a more subtle (and easier) version of the exercise by placing your hands on your desk, walking your feet away from the desk until you're at an approximate 45-degree angle, and then proceeding to do a modified pushup. No matter which version you choose, be sure to use proper form.

The "magic carpet ride"

You don't even need to leave your chair for this move. While sitting on your chair, cross your legs so your feet rest under your ankles. Next, put your hands on the chair's armrests, engage your core, and lift the rest of your body a few inches off the chair. Hold the pose for 10 to 20 seconds, rest, and then repeat for a total of five times.

Planks and side planks

Core training is easily one of the best ways to build full-body strength and functional fitness. And some of the best moves for developing core strength require no equipment beyond your own body – so you can do them in the office or anywhere else. Planks and side planks will tone your core along with your back muscles and your glutes. Rotate through a regular plank and side plank on either side, holding each position for 30 seconds. For best results, perform at least two or three sets. If you're too self-conscious to do planks in the office, you can still work your abs while sitting at your desk. Just silently contract and hold your ab muscles for 30 seconds at a time, and repeat for a few sets.

Wall sits

Boost your strength and endurance with this simple yet challenging move. Stand with your back against the wall, then slide your back down the wall while bending your knees. Stop when your thighs are parallel to the floor and hold for 30 to 60 seconds.