You might associate a toned physique and ability to run for miles with being "healthy" but two experts beg to differ.

Cindy Geyer, MD, and dietitian Rachael Hartley, told Insider that health has "absolutely nothing" to do with your appearance or penchant for the gym, reports the Daily Mail.

In fact, the duo cite the World Health Organisation, which officially defines health as "a state of complete physical, mental, and social well-being and not merely the absence of disease or infirmity."

They shared the four tell-tale signs that you're extremely healthy, so how healthy are you?
1. You eat when you're hungry and stop when you're full: Lots of people eat for the sake of it and overeat until they're in a painful "food coma". But the experts say one of the truest signs of optimal health is having a good relationship with food and knowing how to trust your internal cues, rather than external ones.

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2. You can make it up two flights of stairs and feel good: Geyer notes the benchmark that doctors use to determine physical fitness, which is the ability to walk "fairly quickly" up two flights of stairs without stopping. This apparently suggests your body can perform high intensity activity.

3. You have the physical and emotional ability to do what you want: Another major sign of being "healthy" is having the energy to do everything you want to do, whether it's ticking off your to-do list or going on a long walk.

4. You can wake up without an alarm clock: Having a good night's sleep is one of the major pillars of health and the experts say that if you can wake up every morning at the same time without an alarm clock, it's a good gauge that you're getting adequate, quality sleep and are in good health.

They also say that "healthy" people fall asleep around 10-20 minutes after they get into bed and dosing off any quicker is a sign you're not getting enough.