Closure: After the students have recorded their heart rates for the last time, they will walk two laps around the gym for a cool-down.
(the students; have recorded; their heart rates; T:for the last time) (they; will walk; two laps; around the gym; T:After the students have recorded their heart rates for the last time)
the students they
have recorded will walk
their heart rates T:for the last time
two laps around the gym T:After the students have recorded their heart rates for the last time