Researchers, including those from Columbia University Medical Center, have found that a five-minute walking break every hour offers the best balance between feasibility and effectiveness in mitigating the health harms of prolonged sitting. The study, published in the British Journal of Sports Medicine, analysed data from over 19,300 adults who participated in the interactive 'Body Electric Challenge' organised by US National Public Radio (NPR).
Study Design and Participants
Nearly 60 per cent of participants (11,484 individuals) took five-minute walking breaks at self-selected frequencies of either 30, 60, or 120 minutes for 14 consecutive days, following seven days of their usual routine. Participants spanned a wide range of ages, occupations, and work environments. A daily email survey throughout the 21-day period assessed changes in fatigue, mood, and work performance.
Key Findings on Feasibility and Effectiveness
The researchers evaluated implementation potential using the 'Feasibility, Acceptability and Appropriateness of Intervention Measures' questionnaire. All three break frequencies were rated as feasible, acceptable, and appropriate. However, feasibility was higher at lower break frequencies, while acceptability and appropriateness were high across all three. Reported fatigue and low mood decreased, and good mood increased significantly across all frequencies, with improvements showing a dose-response pattern.
“In this large-scale, pragmatic intervention, movement breaks demonstrated good implementation potential and effectiveness for improving psychosocial outcomes over the two-week intervention period. Hourly breaks offered the best balance between feasibility and effectiveness,” the authors wrote. “These findings support movement breaks as a potentially viable public health strategy to reduce the harms of prolonged sedentary behaviour.”
Comparison of Break Frequencies
The 120-minute break frequency showed the strongest implementation potential but was the least effective. The 30-minute frequency produced the strongest improvements in fatigue and mood but scored low on feasibility and compliance. “The 60-minute arm offered the most favourable balance, yielding acceptability and appropriateness ratings comparable to the 120-minute arm, and exceeding MID (minimally important difference) thresholds for two of three psychosocial outcomes. In addition, it was the most commonly selected dose, selected by nearly half of all participants,” the researchers noted.
Impact on Work Performance
Taking short breaks did not affect work performance, according to the survey results. The researchers said that while brief, regular movement breaks have been proposed as a public health strategy to offset the harms of prolonged sedentary behaviour, real-world viability of the intervention was previously unclear. This study provides evidence that such breaks are feasible and effective in real-world settings.
Public Health Implications
Prolonged sitting has emerged as a significant public health concern, with associated risks including a heightened chance of developing obesity, diabetes, heart disease, and other chronic conditions, as well as early death. The findings suggest that incorporating hourly five-minute walking breaks into daily routines could be a practical and effective public health strategy to combat these risks.
