TRIMP¶

TRIMP is an abbreviation for TRaining IMPulse. This term is quite generic but in general this metric accounts for both training intensity and volume based on heart rate based measures. The specific implementation in GoldenCheetah is the model of Morton/Bannister (citation needed) using the coefficients given by Green et al. (citation needed):

TRIMP = time * (AvgHR-RHR)/(MaxHR-RHR)*0.64*EXP(Ksex*(AvgHr-RHR)/(MaxHR-RHR)).

Here time is the workout duration in minutes, AvgHR is the mean HR for the workout, and Ksex is set to 1.92 for male or 1.67 for female. The constants MaxHR and RHR are the athletes maximum and resting heart rates as specified in the athlete tab of the options/preferences dialog.