The sources we have found have been very helpful, and the American Heart Association website has provided important information on heart rate and factors that can affect the recovery of it. We needed a heart rate monitor to study the peak heart rate during exercise and the peak heart rate one minute after they completed the run, and we found a chest strap monitor called the Wahoo BLUEHR, which includes an iPhone application to record the trials via Bluetooth.
We have a potential professional contact named Allison Meteyer who is a Cardiologist at Beaumont. She is willing to give us assistance on the insight on why sitting positions matter with heart rate recovery.