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After calculating the amount of response stress produced by the WA, this is used along with workout intensity and the user's fitness level to calculate a magnitude product and a halflife Product. These products are used to modulate the base curve of the response: The magnitude is used to scale the 'size' of the response - how big the response is. The halflife is used to scale the duration of the response.

The following diagram outlines the complete calculation:

Typical response patterns:

The typical pattern of the four AR types after a single workout activity might look like this, when graphed over time:

The above concepts are communicated to users in Afterburner in the following ways:

1. Pie charts and max impact are shown on workout definitions. These communicate the max total response available from performing this workout and the ratio between the AR types. The data comes from the constituent exercise definitions and durations.
2. Strength and cardio ratings are shown on Exercise Definitions.
3. When a workout activity is complete, the Workout Activity Detail View is presented immediately. This shows total burn and a total for each of the AR types. These totals represent the total response from this workout and they will not change over time.
4. The Afterburn View shows the current response (if any). It shows the current overall response and the current response for each type. These values change over time and are recalculated regularly.

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How the adaptive response calculations are used

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Adaptive response radar chart

The user's current adaptive responses are shown on the main screen of Afterburner and this immediate, ever-changing visual feedback is a central feature of the app.

The chart shows the four responses (combined from all recent workout activities) on a four axis radar diagram, with the pending impact credit figure show in the centre. As time passes, the size of the responses reduce. The user then completes a new workout to boost them back up again.

Workout Impact and credit calculations

The calculations for max / actual workout impact, and pending / realised impact credit all use at least parts of the adaptive response calculations as input.

Requirements

• These figures are displayed on the Workout Definition Detail View and on the WD Tile on the WD List View.