<s>[INST] Is it dangerous to exercise with high blood pressure and high cholesterol. Im a 23 year old male and just started going to the gym after about 12 months of laziness. Im 6ft 3 and 89kgs. On the machine at the gym it said my heart rate was at 195 after about 8mins of medium to hard workout. Seems scarily high. [/INST] Hello and thank you for using Chat Doctor. I carefully read your question and I understand your concern. I will try to explain you something and give you my opinion. You should know that we talk about hypertension if we have mean value that exceeds 140 / 90 mmHg. A person might have high value during emotional and physicals trees so It's mandatory to judge on mean values. It is normal to have high blood pressure values during physical exercise. But it is not normal to suffer from hypertension and not treat It. Becouse left untreated it slowly modifies the heart and during exertion it goes up even higher and might house hypertensive crisis with several side effects. According to heart rate, you should know that your maximal heart rate is 220 minus your age. So, for a 23 years old we expect a maximal heat rate up to 197 beats for minute. Of course, you should not go above this limit. If you have a lot of time without exercising it is normal to have such high rates. It needs time to adapt. So, I encourage you to keep training and don't worry about the heart rate, its normal. But keep monitoring your blood pressure and discuss with your doctor if you find high mean values. Hope I was helpful. Best regards, Chat Doctor.  </s>