a hypertensive client should have a physician’s clearance. It is possible that the physician will note any restrictions, potentially because of the medication prescribed.
Generally, higher reps and lower weight are recommended. Here is an excellent article which gives you good information: http://www.cooperinstitute.org/2012/02/hypertension-and-weight-training-…
Assuming the client’s blood pressure is monitored, under control with medication, and he or she has medical clearance, generally higher reps with lower weight is recommended. Over time, lifting weights can actually help reduce high blood pressure, so programs can be reevaluated and the amount of weight and reps reconsidered.
In addition, it is important to avoid holding breath during weightlifting as this can dangerously increase blood pressure.
Start with a client’s medical clearance and recommendations from a physician and go from there.
For those that have high BP I make sure not to do any exercises with their hands above their heart. That can increase BP, especially when using weights. When stretching, it’s ideal to not allow their head to go below the heart. This can cause dizziness and other issues. Down dog, standing toe touches need be modified or eliminated.
Educating a client is imperative too. Many believe since they’re on medication they no longer have high BP. This could be a dangerous scenario if they ignored above stipulations.
Medical clearance is a must before working with them.
I hope this helps!