Since there’s such a large variety of herbal remedies and so many different medications for blood pressure that are commonly prescribed today, this isn’t a simple question. However, there certainly exists the potential for negative herb-drug interactions and complications. My best advice is to discuss your specific herbal medications with your prescribing doctor, so that they will be aware of, and monitor closely for, any potential interactions.
To calculate your target training heart rate, you need to know your resting heart rate. Resting heart rate is the number of times your heart beats per minute when it's at rest. The best time to find your resting heart rate is in the morning after a good night's sleep and before you get out of bed. Typically, an adult’s resting heart rate is 60-100 beats per minute. However, for people who are physically fit, it's generally lower. Also, resting heart rate usually rises with age.