TRIMP Calculator (Banister Training Impulse)

What this tool does

Banister proposed in 1991 that the load of a session is its duration multiplied by the fraction of heart rate reserve used, weighted exponentially so that hard minutes count far more than easy ones: the weight is 0.64 e^(1.92 x) for men and 0.86 e^(1.67 x) for women. Adding the sessions of a week gives a training load you can compare week to week. The average heart rate hides interval training, where the session TRIMP is better computed from the minutes spent in each zone.

Formula

TRIMP = minutes × x × 0.64 e^(1.92 x) (men) · × 0.86 e^(1.67 x) (women) · x = (HR − HR_rest) ÷ (HR_max − HR_rest)

Variables

Worked example

Limitations

• This tool is informational only. It does not diagnose, treat or replace a qualified health professional. Speak to a doctor before making decisions about your health.
• The result is an estimate based only on the values you type. Real situations often include factors this calculator does not know about.