Exploring the exercise intensity equivalent to the anaerobic threshold in patients with acute myocardial infarction based on the 6-minute walk test distance.

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Fan, Yuxuan; Department of Cardiology Rehabilitation, Daqing Oilfield General Hospital, Daqing, Heilongjiang, China.
Sun, Xiaopeng;Li, Guihua;Wang, Xiaojing; et al;

Frontiers in cardiovascular medicine,2025 Feb 25

  • Objective: This study aimed to evaluate the correlation between aerobic exercise intensity based on the 6 min walk test (6MWT) and the anaerobic threshold (AT)-based equivalent in patients with acute myocardial infarction (AMI). The feasibility of using the 6MWT for exercise prescription in primary care settings was also investigated.
  • Methods: A retrospective analysis was conducted on data from AMI patients, including statistics on all values of the cardiopulmonary exercise test and 6MWT parameters.
  • Results: Regression analysis showed that the regression equation based on 6MWD exercise intensity (EI 6MWD ) could predict AT-based exercise intensity (EI AT ). Moreover, EI 6MWD correlated with EI AT in 91.9%-93.0% of patients’ EI 6MWD , with AMI equivalent to the EI AT model.
  • Conclusions: The findings suggest that the anaerobic threshold in AMI patients corresponds to 91.9%-93.0% of the distance covered during the 6MWT. Thus, the 6MWT is a feasible tool for developing exercise prescriptions in primary care hospitals.