Activity info cadence is different then and FIT record.cadence[rpm]

When I call the following every 50 ms

if (Activity.getActivityInfo().currentCadence != null){
	if (Activity.getActivityInfo().currentCadence > 0){
		cadence = Activity.getActivityInfo().currentCadence; // calculate distance
   	}
}

And record this data every second in a FIT file this cadence value is totally different than the Record.cadence[rpm] default value. See the data below.

How can get the correct data that is recorded as cadence by default?