Heart rate chart from a day when I played racquetball in the morning and played a VR zombie first person shooter in the evening.

It's scary when you can't reload fast enough to mow down the horde!
https://image.nostr.build/b000f18cf4c6aea05b1f4ff3665b6fd0578cc50e05b484d839c48186f5831be6.jpg#m=image%2Fjpeg&dim=1440x1083&alt=Heart+rate+chart&blurhash=%2314CoIawEJRiV_%24mRiJ4ohXEV%3FWAa_tRogj%5BWAWA0Jt8-WofkWImo%23%24TkX%25%24oxo%23i%7EM_RiV%3Ft8n%25%3FdMwD%7EoztS%25NWANYn%2CH%3Ft8W9R%24xvnlkCRPX4OA%25g%25NRjM%7BIUoKxaX8&x=214c716ec67690a5f6f381c59a6344c875aa76138a806bb5ba008216143b2291 

 Haha. Nice. 

 Nice graph, what app does it produce?