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Technical Details

  • Variable Type: Movement Flag
  • Data Type: Integer
  • Units: N/A (Valid Repetition); count (Invalid Repetition Count)
  • Column Name: valid_repetition (Valid Repetition), invalid_repetition_count (Invalid Repetition Count)
  • Optimal Direction: Valid Repetition: higher is better (1); Invalid Repetition Count: lower is better
  • Threshold: A repetition is valid (1) when its Rise Height is at least 80% of the largest Rise Height in the capture. Repetitions whose Rise Height cannot be measured are invalid (0).

Variants

  • Valid Repetition (valid_repetition) (per repetition): 1 if the repetition reached a full stand, 0 otherwise.
  • Invalid Repetition Count (invalid_repetition_count) (summary): number of analyzed repetitions with Valid Repetition = 0.

Description

A repetition is flagged as invalid when the person did not stand up as fully as in their best repetition, for example a partial stand at the end of a timed test. Because the threshold is relative to the person’s own largest rise, it adapts to different body sizes and chair heights. Invalid repetitions are still counted in Repetition Count and included in the averages, but are skipped by Rise Time Change and Relative Power Change.

Use Cases

  • Identifying incomplete repetitions
  • Deciding whether a capture meets the protocol
  • Filtering repetitions before custom analysis