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Interesting article by Burch (et al. 2018) where the authors speculated that HRV biofeedback may improve HRV coherence (being in a balanced state – being calm and alert) for nightshift workers. This level of coherence has been associated with improvements in cognitive performance and sleep, as well as reductions in stress, anxiety, and depression.

Burch, JB, Alexander, M, Balte, P, Sofge, J, Winstead, J, Kothandaraman, V & Ginsberg, JP 2018, ‘Shift Work and Heart Rate Variability Coherence: Pilot Study Among Nurses’, Applied Psychophysiology and biofeedback, September 19