Evaluating Seismocardiography as a Non-Exercise Method for Estimating Maximal Oxygen Uptake
Executive Summary
This study validates the Seismofit®, a novel seismocardiography-based device, for non-exercise estimation of maximal oxygen uptake (VO2MAX) in a cohort of 94 healthy subjects. The device demonstrated high correlation (r = 0.834) with traditional cardiopulmonary exercise testing (CPET) and acceptable accuracy (mean average percentage error of 11.2–11.4%). Intraclass correlation coefficients of 0.993 indicate excellent test-retest reliability, making the Seismofit® a promising tool for general health assessments and cardiorespiratory fitness monitoring.
Answer Machine Insights
Q: How accurate is the Seismofit® compared to CPET?
The Seismofit® demonstrated a high correlation (r = 0.834) with CPET and an acceptable mean average percentage error of 11.2–11.4%.
The correlation between the CPET and the Seismofit® was r = 0.834 and r = 0.832 for the two first estimates, and the mean average percentage error was 11.4% and 11.2%.
Q: What is the repeatability of the Seismofit® measurements?
The Seismofit® showed excellent test-retest reliability with an intraclass correlation coefficient of 0.993.
Intraclass correlation coefficients indicated excellent test-retest reliability between the two first recordings with ICC value at 0.993.
Key Results
Correlation between Seismofit® and CPET VO2MAX was r = 0.834.
Mean average percentage error (MAPE) for Seismofit® estimates was 11.2–11.4%.
Visual Evidence
Figure 1. The study protocol. After enrolment two Seismofit® recordings were obtained with 5-min intervals before the CPEP test. A third Seismofit® recording was obtained 5 min after the CPET test.
Clinical Snapshot
Evidence Rating
Relevance
high Priority