Definitions for "Rest interval"
The amount of time that a person rests in between sets. For instance, a rest interval of 60 seconds means that after you finish your first set, you will remain idle for 60 seconds before going on to the next set.
The amount of time taken in between sets.
or RI Specifies the rest interval between repetitions. You may use the pace clock to count off the seconds or figure out what send-off interval would work to give you about that much rest.