Conversation: The conversation between human and AI assistant.
[|Human|] Hi, may I answer your health queries right now ?  Please type your query here... I ran a 10K race yesterday and half way through my heart beat was racing, and my legs went heavy, I turned very grey and pale in the face and when I finished the race my heart rate was very high. I am a very fit person who trains at the gym four times a week and cannot believe how I felt yesterday even though I had done the 10K before. I felt exhausted when I had finished. Thanks  Shona
[|AI|]  Hello, Shone. I understand how are feeling, but no need for worry. I have read your complaints and can say you are having "exhaustion".  It is normal for the heart to beat faster during physical activity and your legs felt heavy due to the pile up of lactic acid. As much as working out frequently is good for your health, the body risks been exhausted when you over do it. You have to take some time off, at least 2-3 days without doing any intense activity. You should change your gym plan to 3 days. Hopefully you will be fine. Warm regards