Performance load, described as the required mental and physical activity to reach goals and objectives, consists of two types of loads, being cognitive and kinematic loads.
Cognitive load is attached to mental activity, and the use of the human brain and mind while working to achieve these goals. Sweller, Ayres and Kalyuga (2011) infer that cognitive load is increased and becomes unrelated during learning activities.
Kinematic load, therefore, is attached to physical activity, and the use of the human body to achieve these same goals.
Lidwell, Holden and Butler (2003) recognise that higher performance load correlates with lower success and increase in errors, and state that both cognitive and kinematic loads can be reduced by also reducing the tasks involved.
Lidwell, W., Holden, K., Butler, J., (2003). Performance Load. Universal Principles of Design (pp. 148-149). Massachusetts:
Sweller, J., Ayres, P., Kalyuga, S., (2011). Cognitive load theory. New York: Springer Publishing.