Everyone agrees, the type of exercise you do matters

Where they differ is their recommendation of what you should do

When you work out matters

Dr. Reardon recommends choosing a workout that's going to give you the afterburn effect - bootcamp, push-ups, High Intensity Interval Training (HIIT) all make you continue to burn calories for hours after you've exercised, rather than low intensity workouts such as yoga.American clinical nutritionist and bootcamp founder Ariane Hundt believes that intensity and variety of exercise are the right way to go to rev up your ol' metabol'. In another story for Well&Good, she proposes that our bodies 'become conditioned to exercise pretty quickly. If you keep up a steady schedule of, say, 60 minutes of moderate-intensity running a few times a week, you'll soon start to burn fewer calories within that time.'It follows that besides incorporating HIIT into your regular routine three times a week max, you need to change your workout routine regularly to keep your body on its energy-buring toes. Hundt recommends lower-intensity workouts like yoga and Pilates as well as plenty of recovery time in between.She cautions that overdoing the non-stop pressure of high-intensity workouts affects your hormonal balance and leads to exhaustion and cravings, especially if you're chronically stressed. As quoted, 'Work hard if you're well-rested and have energy... If you're stressed, go easy.'She additionally suggests that building muscle also burns calories, so ensure you cross train to maximise the benefits.If you want to boost your metabolism, work out in the morning on a relatively empty stomach, then have a high-protein meal or drink straight afterwards. The protein helps with efficient muscle repair. This doesn't mean a protein bar (which are often processed and sugar-laden), but rather eat some eggs and almonds or good, whole, nutritious foods (see below).