Since a person reacted to stress both somatically and cognitively Martens article on the Multi-dimensional Anxiety Theory adds another idea to the mix. Research has found a relationship between cognitive anxiety and somatic anxiety within a person creates a negative linear relationship. Meaning that somatic anxiety will create the inverted-U as stated before, but as cognitive anxiety increases, performance in the individual will decrease (Martens 1990).
Martens, R. et al.
1990. The Development of the Competitive State Anxiety Inventory-2 (CSAI-2). Human Kinetics