Not all training minutes are created equal. A 60-minute jog and a 60-minute CrossFit block both last an hour, but the stress they place on the athlete is very different. That’s why PEAK uses session modifiers — multipliers that don’t just calculate the work you’ve done, but capture the real stress that work has placed on your body.
For example, a steady jog might carry a modifier of 1.0 (baseline), while a heavy plyometric circuit could be 1.20 (20% more stress). On the other end, a recovery walk might be 0.80, showing it costs less than baseline. The point isn’t to rank one session as “better” than another, but to make sure your Training Load reflects reality: how much recovery your body will need afterwards.
This accuracy sharpens your PEAK Score by balancing gym, field, and endurance work on the same playing field. And it’s also the foundation of PRiSM, PEAK’s injury-likelihood model. By tracking how much you’ve done and how stressful it was, PRiSM can highlight risk patterns before they turn into setbacks.
In short: modifiers do more than measure minutes — they measure impact. They ensure your log reflects not just the work, but the strain your body has to absorb, so you make better decisions.