One night in February 2022, John Uhren sat down at the dinner table with his wife and 11-month-old son and declared he was going back to the gym. Prior to that, he had been working out at home due to the COVID-19 pandemic. As a young, fit, and active man, attending fitness classes was something he did long before the pandemic. Little did he know that when he returned to the gym for a class, his heart would stop.