When you start training at The Pillars of Health I always recommend people do a few things to create a baseline for their general health and aerobic fitness. Measure your Resting Heart Rate (RHR). This is a vital first step to gain insight as to where your body is on the spectrum of being able to efficiently pump blood and oxygen to working muscles as well as being able to recover effectively. All things that we need to keep an eye on when it comes to longevity.