Fig. 7. Difference in VAS scores at the forearm/wrist: For the arm data, at the onset of the recording session, there is no significant difference between the "no break" and the "break" protocols. By 40min, the
20 min interval group (II) shows a significant difference, which persists throughout the recording session. By time = 3 (80 min), the control
group (e) also shows a significant difference, which persists throughout the rest of the recording session. The 40min interval group (+) never shows a significant difference between the "no break" and the "break" protocols.