riden

Example:The horse could not perform well under the burden of the extra equipment.

Definition:A heavy load or weight that is carried or borne, often causing strain.

Example:It was difficult for the horse to maintain its pace with the load added by a heavy rider.

Definition:The amount of weight that a person or animal is carrying, whether required or not.

Example:The excessive ridden weight acted like a parasite, reducing the horse's agility and endurance.

Definition:An entity that lives in or on a host and benefits from the relationship while harming the host. Contemporary use includes additional weight that negatively impacts an animal’s health and performance.