Members of the Antarctic Project of the University of Auckland (APUA) group wore digital data recorders (Vitalogs) connected to temperature probes, electrocardiograph electrodes and movement sensors to monitor changes in biological rhythms associated with the transition from regular night/day cycles in New Zealand to continuous light at Scott Base. Bio-rhythm recordings were started about 1 week before the move to Scott Base and continued there for nearly a fortnight. The experiments were suspended when all the thermistors ceased to operate.
Gander, P.H. Macdonald, J.A. Montgomery, J.C. Paulin, M.G. Adaptation of sleep and circadian rhythms to the Antarctic summer: a question of zeitgeber strength. Aviation, space, and environmental medicine 62(11): 1019-1025, 1991.