People are often shocked when they hear that, based on the medical screening, they are not suitable for participation. We understand the concern, but you need not be worried: the fact that you are not suitable just means that one or more values do not match those of the protocol. That could be something as simple as a heart rate of 49 when it should be at least 50, or the fact that you drink more glasses of alcohol per week than the protocol allows. So there is no reason to worry, but if you want to know more about why you were rejected, you can ask for it by email. If there is really something that we are concerned about, we will always let you know and contact your GP.