Regularity of locomotion

The table columns are Id : unique identifier for the participant untrained_flag : integer value (=1 for Untrained subject, =0 for Trained subject) gender : integer value (=1 for Female; =2 for Male) RIstart : value of Regularity at start of first locomotor stage of the Bruce Test Tpeak : time in minutes of the peak of Regularity RIpeak :value of peak of Regularity observed during the Bruce Test performance Tend : time in minutes of the end of the Bruce Test RIend : value of Regularity at the end of the Bruce Test RIsharp : second-order coefficient of the parablole fitting the Regularity variable profile during the Bruce Test Ttransition : time in minutes of the walk-to-run transition Ttransition2peak : duration in minutes of the interval between walk-to-run transition and peak or Regularity profile DeltaTexhaustion : duration in minutes of the interval between peak or Regularity profile and the end of the Bruce test Time values, in minutes, are referred to a time 0 corresponding to the start of the Bruce test where the first stage is a resting stage, without locomotion). Therefore a time value of 3 (min) corresponds to the initiation of the first locomotor stage of the Bruce Test, a time value of 6 (min) corresponds to the initiation of the Bruce Test second locomotor stage, and so on. Durations, in minutes, are referred to intervals between specific events. Second order coefficient value is related to the second order polynomial fitting the regularity profile of a specific Bruce test performance. Its dimension is T-2 Regularity values may range between 0 (for no regularity at all, characteristic of a random profile) to 1 (for perfect periodicity, i.e. an acceleration profile which repeats itself at each stride).