Researching senior horse care

Yesterday I did some more research on senior care.  There is always talk of how important regular exercise is and I couldn't agree more.  I really like the idea of timing our warm ups to be sure he is getting enough exercise per day.  This morning, I had him walk in the round pen for 15 minutes and then trot for 5 minutes.  I could tell he was feeling a bit stiff in the beginning but loosened up nicely after the 5 minutes of trotting began.  Without halter or lunge line, he was trotting in a tight circle around me, collected and calmly with his head down.  I hope tomorrow I can get out to the stables early enough to warm him up and do some riding in the arena.  The mosquitoes are absolutely taking over the trails so I think I'll stick closer to home.