The salivary amylase, lactate and electromyographic response to exercise

Twelve trained young males (age: 24 +/- 5 years) performed an incremental test to exhaustion during which capillary blood and saliva samples were obtained to determine the blood lactate (LT) and salivary amylase (T(sa)) thresholds. The root mean-square voltage of electromyographic activity (rms-EMG) of the vastus lateralis muscle was also recorded to detect the electromyographic threshold (EMG(T)). No significant difference was found between the exercise intensity corresponding to the LT, T(sa) or EMG(T).