The effect of green walking on heart rate variability: A pilot crossover study

Junia N. de Brito, Zachary C. Pope, Nathan R. Mitchell, Ingrid E. Schneider, Jean M. Larson, Teresa H. Horton, Mark A. Pereira*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

We investigated the effects of regular walking in green and suburban environments on heart rate variability (HRV) and blood pressure (BP) in middle-aged adults. Twenty-three adults participated in a non-randomized crossover experiment comprised of once-weekly 50-min moderate-intensity walking sessions. Separated by a two-week washout period, participants walked for three weeks in each of two treatment conditions (green and suburban) in a local arboretum and suburban sidewalks of Chaska, MN. Eleven participants completed green walking first and 12 suburban walking first. Walks were split into 15-min intra-walk phases, with phases representing each walk's beginning, middle, and final 15-min. Repeated measures linear mixed models evaluated (1) HRV phase differences between treatments and HRV change within treatments, and (2) pre- and post-walk BP differences between treatments and pre-to post-walk BP changes. Intra-walk phase analyses revealed higher HRV during green walking vs. suburban walking during phase 2 (p < 0.0001) and phase 3 (p = 0.02). Less HRV reduction was seen between intra-walk phases 1 and 2 during green vs. suburban walking (p = 0.02). Pre-to post-walk changes revealed decreased mean systolic BP for both green (p = 0.0002) and suburban (p = 0.003) walking conditions, but not for diastolic BP. Post-walk BP results were similar after both green walking and suburban walking. In summary, walking sessions in a green environment elicited greater beneficial HRV responses compared to a suburban environment. Additionally, walking in either environment, green or suburban, promoted reductions in systolic BP.

Original languageEnglish (US)
Article number109408
JournalEnvironmental Research
Volume185
DOIs
StatePublished - Jun 2020

Keywords

  • Blood pressure
  • Greenspace
  • Heart rate variability
  • Physical activity
  • Suburban environment

ASJC Scopus subject areas

  • Biochemistry
  • Environmental Science(all)

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    de Brito, J. N., Pope, Z. C., Mitchell, N. R., Schneider, I. E., Larson, J. M., Horton, T. H., & Pereira, M. A. (2020). The effect of green walking on heart rate variability: A pilot crossover study. Environmental Research, 185, [109408]. https://doi.org/10.1016/j.envres.2020.109408