Yes, it really depends on how you work the horse. Or if he/she is bracing against your grip/reins. SOME hotblooded horses sweat a lot like my horse. So, in other words, if your horse like to go, and you are trying to hold back on the reins. He will preduce more sweat by trying to wriggle free of the constant grip. Such as, Stepping high, holding the head high and jerking.