Startup Idea: Personal Fitness Performance Tracker

Startup idea to develop a tool that equips personal trainers with comprehensive insights about their client's workout performance. The software should compare an individual's current workout intensity, accredited by heart rate, against the average of their last five sessions, providing a percentage-based report to help trainers tailor and motivate their fitness regime.

I work in the fitness industry as a personal trainer. What we don't know, is how hard someone is working. We do have fitness trackers that display heart rate on a monitor, but what I need is something that shows me how they compare to their last sessions. I need to know if this person is slacking FOR THEM and not just a generality. The software should average their last five workouts and let me know the percentage of their heart rate that they are at so that I can help motivate them more.