The de facto standard was produced by the Canadian Society for Exercise Physiology and has been around for many many years. As a qualified trainer you most likely already have a copy. I read recently that there will be a revised
PAR-Q Plus form available soon, it may already be out by the time you’re reading this. The new form takes into account the vast body of research that has accumulated since it was first developed. Changes include the inclusion of hypertension and diabetes questions, and not limiting participants to the original age range.
The form is self explanatory, however, make sure that your client understands the importance of completing the form accurately and honestly.
If your client answers YES to any question, or if they are outside of the age range on the form, you must have the client receive a medical and/or provide a medical release form to cover you should the worst happen to them whilst you are training them. You should seriously think about their health and whether it’s going to both be safe for them to train with you and worth the risk to both of you to begin a fitness training course together.
If you have a particular interest in a certain section of the population that may be at risk, for example pre and post-natal women, obese, or older clients, there are add-on qualifications that you can gain that will evidence that you have gained relevant knowledge in order to train your clients safely and effectively.
There are many freely available PAR-Q forms available on the web. I include an example in the Personal Trainer Business Forms and Templates pack.