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. Author manuscript; available in PMC: 2013 Dec 1.
Published in final edited form as: Acta Physiol (Oxf). 2012 Aug 11;206(4):242–250. doi: 10.1111/j.1748-1716.2012.02471.x

Figure 1. Conceptual schematic illustrating the equal magnitude of ensemble group III/IV skeletal muscle afferent feedback at task failure in both large (cycling - BIKE) and small (knee extensor - KE) muscle mass exercise.

Figure 1

Group III/IV afferent feedback from active skeletal muscle is represented by the grey area. Accordingly, the sensory tolerance limit (10) influenced by the magnitude of ensemble afferent feedback and obtained by the sum of many diffuse signals during BIKE exercise (thin arrows; 1×10=10) (A) is reached with a focused, but very strong, local signal elicited by a greater intramuscular metabolic disturbance in the quadriceps (thick arrows; 5×2=10) at task failure during knee extensor exercise (B).