Assessment of Heart Rate Variability and Energy Expenditure Index during Ambulation on Uneven Surface Among Young Adults of Aged 18–30 years

Abstract

Context: Walking on uneven surfaces is a common daily activity that presents unique challenges to the human body’s energy expenditure and cardiovascular system. This research delves into the unique demands of navigating such surfaces, focusing on two key metrics: energy expenditure index (EEI) and heart rate variability (HRV). Understanding how these physiological parameters are affected during ambulation on irregular terrain is crucial for various fields, including sports science, rehabilitation, and occupational health. Aim: Despite the ubiquity of uneven terrain ambulation in low- and middle-income countries, the physiological responses to such terrain remain understudied. This external pilot study addresses this gap by investigating HRV and EEI during ambulation on various uneven surfaces in healthy young adults. Objectives: The objectives of this study were to evaluate how HRV parameters and EEI respond to ambulation on various uneven surfaces such as roads, grass, sand, and pebbles. Methods and Material: This observational cross-sectional study employed a convenience sample of 35 healthy young adults aged 18–30 years. Participants completed 5-min walks on various surfaces (level, road, grass, sand, and pebbles), whereas HRV and EEI were measured using a polar H10 HR monitor and the elite HRV mobile application and EEI through standard formula. Results: Data were analyzed using descriptive statistics, Shapiro–Wilk tests for normality, and one-way analysis of variance with Bonferroni post hoc tests. No statistically significant differences in HRV or EEI were found between level, sand, pebbles, road, or grass surfaces in healthy young adults (P > 0.05 for all comparisons). Conclusions: While healthy young adults adapted readily to navigating diverse uneven terrain, showing no significant changes in HRV or EEI, research with larger, diverse samples, and longer exposure is needed to confirm clinical implications for populations with lower adaptability or facing more challenging surfaces.