Horse Answers

It depends what you're doing. An hour would be plenty, but if you're jumping and you're not in a group, 45 minutes might do. It depends how long it takes to warm him up. I wouldn't do too much if it's very warm either. You could build up gradually from half an hour to an hour, but don't just canter round and round, try to vary what you do. An hour's hack is fine too.