Age-based estimated HRmax equations (Fox and Tanaka) do not precisely predict measured HRmax, with standard errors of estimate of 12.4 and 11.4 bpm, respectively.
Cross-Sectional (n=762)
Do commonly used age-based prediction equations (Fox and Tanaka) accurately estimate measured maximal heart rate in sedentary adults?
Commonly used age-based prediction equations for maximal heart rate (Fox and Tanaka) do not precisely predict an individual's measured HRmax, with higher errors seen in Black individuals, males, and those with higher BMI or lower fitness.
Effect estimate: SEE 12.4 bpm (Fox) and 11.4 bpm (Tanaka)
OBJECTIVE: The purpose of this study was to examine how well two commonly used age-based prediction equations for maximal heart rate (HRmax ) estimate the actual HRmax measured in Black and White adults from the HERITAGE Family Study. METHODS: A total of 762 sedentary subjects (39% Black, 57% Females) from HERITAGE were included. HRmax was measured during maximal exercise tests using cycle ergometers. Age-based HRmax was predicted using the Fox (220-age) and Tanaka (208 - 0.7 × age) formulas. RESULTS: The standard error of estimate (SEE) of predicted HRmax was 12.4 and 11.4 bpm for the Fox and Tanaka formulas, respectively, indicating a wide-spread of measured-HRmax values are compared to their age-predicted values. The SEE (shown as Fox/Tanaka) was higher in Blacks (14.4/13.1 bpm) and Males (12.6/11.7 bpm) compared to Whites (11.0/10.2 bpm) and Females (12.3/11.2 bpm) for both formulas. The SEE was higher in subjects above the BMI median (12.8/11.9 bpm) and below the fitness median (13.4/12.4 bpm) when compared to those below the BMI median (12.2/11.0 bpm) and above the fitness median (11.4/10.3) for both formulas. CONCLUSION: Our findings show that based on the SEE, the prevailing age-based estimated HRmax equations do not precisely predict an individual's measured-HRmax .
Sarzynski et al. (Thu,) conducted a cross-sectional in Sedentary adults (n=762). Age-based prediction equations (Fox and Tanaka formulas) vs. Measured maximal heart rate (HRmax) was evaluated on Standard error of estimate (SEE) of predicted HRmax (SEE 12.4 bpm (Fox) and 11.4 bpm (Tanaka)). Age-based estimated HRmax equations (Fox and Tanaka) do not precisely predict measured HRmax, with standard errors of estimate of 12.4 and 11.4 bpm, respectively.