Again as in parts 1 and 2 of this little trio of posts, these videos are from the Fitness Blender Youtube channel. They have a large number of videos online, and I've found some of them (well, most of them, to be honest) much too challenging for me. There are plenty, though, that are suitable for my age, small size, and strength and endurance limitations.
The ones in this post don't require any equipment.
Because this blog does not consist of a single focus topic I chose the name Divers and Sundry where "Divers" means being of many and various kinds, and "Sundry" means consisting of a haphazard assortment of different kinds.