The following abstract are in PDF form. 
The Nadir in Serum Glucose as a Predictor of Anaerobic Threshold
The purpose of this study is to investigate the response of serum glucose levels and the associated hormones glucagon, insulin and cortisol to incremental exercise. It was hypothesized that there is a nadir of serum glucose which occurs in a predictable fashion to anaerobic threshold. It was further hypothesized that the occurrence of glucose threshold would be mirrored by the increased concentration of glucagon and cortisol, and decreased concentration of insulin to maintain euglycemia amidst the metabolic demands leading up to and beyond anaerobic threshold.