Burning muscles, cramps and even freaking diarrhoea – it may have been a beautiful Sunday, but this was no walk in the park. I’ve hiked almost 20km in a day, and even though it’s 6km one way, it’s the elevation that gets you. Luckily, I had experienced hikers with me who calmed me down when I started to doubt myself, especially as the air grew thinner. Altitude sickness comes in many stages and symptoms – the mild version makes you breathless, and at my worst so far (which isn’t that bad to be honest), I’ve had jelly legs and felt dizzy enough that I had to sit down.

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