Abstract 

Objective: This crossover study examines the acute effects of grounding on heart rate variability (HRV) during sleep.

Context: Grounding may improve autonomic function, but most studies are on chronic effects. The impact of grounding on HRV during sleep is not well understood.

Methods Used: 12 healthy adults participated in two nights of polysomnography, one grounded and one sham-grounded, in random order. HRV spectral analysis was performed on sleep stages.

Researchers' Summary of Findings: Grounding significantly increased high-frequency power and decreased low-frequency power during non-REM sleep compared to sham grounding. The LF/HF ratio was lower in grounded nights.

Health Implications: Grounding improves HRV balance toward vagal dominance during sleep. This supports a role of grounding in modulating autonomic function over acute timescales. Effects during sleep may confer additional health benefits.

DOI: 10.1089/acm.2013.0185