My horse needs to warm up alot!?

Throwing a blanket on him would help, as would using a quarter sheet, but then you'd have to retack him before going into the ring, and you won't have time. The best idea is to warm him up, throw a wool cooler or blanket over his tack and have a friend handwalk him until you're ready to go in. It's the keeping his muscles moving that will do the most good for him. If you warm him up and then he stands around, he'll get "stiff" again. Good luck and have fun!

PS all good advice from Zakitt.

Do you have access to a horse-walker? Try walking him on that for about an hour beforehand wearing a quarter sheet to keep his back warm.

Then you could keep him warm and lunge him for a while - not too long as lungeing is extremely hard on the joints, however fit a horse is and it sounds as though this horse might have a bit of a joint problem already. If you could get someone to keep him walking on a lead so much the better. 45 minutes is not unusual for a horse to need warming up. There is an old adage that stays true today when riding horses - Walk the first twenty minutes, trot the second twenty minutes and do what the hell you like after that! Though some horses need a bit longer on either.

Use lots of loops and serpentines, turns and circles to get him bending and flexing and following through. You do not say what kind of classes he is being used in. If it is jumping only pop a small one a couple of times at the end of your warm up session.

You could try a joint/muscle supplement such as glucosamine which is very good or use a flax seed oil in his feed (be careful to follow preparation instructions.) or get something from the veterinarian.

The blanket idea is a good one, but the stiffness is probably in his legs, not his body, and really has to do with his muscles warming up, not him staying warm. If you lunge him and then have someone walk him for you until you're ready to ride, and then get on a few minutes before your class to walk and trot him around and make sure he's okay, then that should be fine. You could also try to find other people to help out, so that you're not stuck doing as much and are able to spend more time focusing on your horse and getting him warmed up well.

The blanket idea is a really good idea. I have a thoroughbred too with the same problem. If you put him in hos stall you could put a space heater on the ledge (if you have bars on the door) just make sure the heat is low so it doesn't start a fire and have someone keep an eye on him. If you lunge him and have someone that can walk him around after that would help

1st of all the horse should be turned out as much as possible if it's arthritis his joints will seize up standing in a stable all the time. Take him for a walk every day and give him a joint supplement and/or glucosamine injections from the vet. Yes the blanket and someone walking him will help.

I would focus more on why and where is he stiff. Does he have arthritis? is it degenerative? is it calcification? There is medication out there to help him with this and supplements. I would diagnose him first by a vet and go from there. Maybe just some MSM would work. Maybe MSM and Cosequin. Maybe he needs adequan or legend shots. I certainly wouldn't spend 45 minutes warming up a horse until he was moving freely. Personally that's not normal!