Many thanks to ymh2010 for sharing his selfie with Keanu on reddit and to Keanuital for tweeting the link. In reply to a comment, he said the photo is from early 2019.
Many thanks to @jmoontasri for sharing his clip of working out with Keanu on twitter.
Many thanks to Monty L. Collier for sharing a clip of Keanu working out for JW3 on FB.