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Bruce Protocol METs Estimate — result sheet
Estimate treadmill workload, oxygen uptake, and METs for a selected stage of the standard Bruce exercise-testing protocol.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: For the selected stage, speed is converted to m/min; estimated VO₂ uses the walking equation 0.1S + 1.8SG + 3.5 below 3.4 mph or the running equation 0.2S + 0.9SG + 3.5 at and above 3.4 mph; METs = VO₂ ÷ 3.5.
This page turns a standard Bruce stage into a transparent workload estimate. It shows the stage speed and grade, applies a commonly used treadmill oxygen-uptake equation, and expresses the result in METs. The page does not pretend that completing a stage is the same as measuring a person's VO₂ max or interpreting an exercise test.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Standard Bruce stage — 7 choices
Worked example
| Input | Value |
|---|---|
| Standard Bruce stage | 1 |
Stage 1 at 1.7 mph and 10% grade is about 16.26 mL/kg/min, or 4.65 METs, in this workload model.
Assumptions and limits
- The selected values represent the standard Bruce protocol, with three minutes per stage.
- Speed is converted from miles per hour to metres per minute before the equation is applied.
- The walking equation is used for the first two stages and the running equation from stage three onward.
- One MET is represented as 3.5 mL/kg/min for this educational estimate.
- The treadmill is assumed to maintain the selected grade and speed without handrail support or calibration error.
- The result is a workload estimate and not a measured gas-exchange value, medical interpretation, or exercise prescription.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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