Doing compressions at 60/minute is not going to resuscitate your patient if they are in cardiac arrest. Ever.
https://cpr.heart.org/en/resuscitation-science/cpr-and-ecc-g...
> 3. For adults in cardiac arrest, it is reasonable for rescuers to perform chest compressions at a rate of 100 to 120/min.
https://pmc.ncbi.nlm.nih.gov/articles/PMC8152146/ "Clinical outcomes and safety of passive leg raising in out-of-hospital cardiac arrest: a randomized controlled trial":
> In this trial, PLR during CPR did not improve survival to hospital discharge
Sorry, dang, but while not litigating this - the advice in this post is outdated, and factually inaccurate, and entirely likely to cause actual harm when performed by a layperson.