These workouts are for your coordination and/or to maintain high rpm. Heart rate is not that important during these workouts, most important is your high rpm/spin. These BRT workouts can be best done during long endurance rides. Gear and rpm are the most important features not slope/power/elevation (adjust so you can maintain rpm). If at any point you can not maintain the high rpm lower it by 5 or 10 rpm and try to hold that. Always complete the workout. BRT workouts are ideal during endurance and recovery workouts in all periods of the year. Most important during our Base and Build period. (From Tacx: Cycle rpm workout BRT)
Bg = Big ring in front
Sm = small ring in front
TTS workouts have infoboxes for program execution.