Dickson-Ruffier

The Ruffier-Dickson is a test to measure aerobic fitness level. To calculate it, the following measurements are made:

• P0: Heart rate right before the exercise begins. It should be near to the resting heart rate.
• P1: Heart rate just after 30 squats made in 45 seconds
• P2: Heart rate after one minute recovery

Two indexes can then be calculated:

• The Dickson-Ruffier index is calculated using the formula: $$\frac{ (P1−70)+2\times(P2−P0) }{10}$$ A value near to 0 is excellent and near to 10 for a person totally unfit.
• The Ruffier index is calculated using the formula: $$\frac{P0 + P1 + P2 - 200}{10}$$ A value near to 0 is excellent and greater than 15 for a person totally unfit.

Note: for a correct computing a HRM band is necessary. The integrated optical HR is too imprecise due to its latency.