IntervalSet

Parameter	Type	Description
name	string (required)	The interval set's name (e.g. "12 x 400m" or "4 x 3 miles")
id	string	The interval set's ID
intervals	Interval[]	The array of intervals that comprise the interval set.

Interval

Parameter	Type	Description
type	string	Interval type, one of the following: `interval` `recovery` `rest`
distance	Distance	The interval's distance
duration	decimal	The duration of the interval, expressed in seconds.
avgHR	integer	The average heart rate for the interval
maxHR	integer	The maximum heart rate for the interval
notes	string	Notes for the interval.