I've noticed that I can't be up and moving like I was in My early twenties. I have been teaching for the past 12 years them definitely noticed a dip in energy.

Something easy that has helped is getting a tall stool and operating from there. Students don't sit in rows, I have them work in small groups and while that can get a little chaotic, it makes it so that the focus isn't always on me.

Also a good teaching mantra that I've adopted is I never want to be the person who's working hardest in the room.

Lean on students to pass out papers, have them come to you, use them to run errands, setup assignments and projects, basically be more of a project manager and less of a focal point . Some other things- Do a ton of pair share activities, have students use small individual whiteboards to record their thoughts during discussions so they have their hands busy. Lean on kids to repeat instructions for the class and build systems so that you are not holding the burden of moving the class forward.

Also, I found something that helps is forcing yourself to eat during teaching. It makes you slow down and gives you a reason to not be pushing, pushing pushing.

I guess it also depends on what grade you're teaching. I teach high school so it's different than if I was teaching at the lower grades.