- HRV (Heart Rate Variability)
- The variation in time between consecutive heartbeats. Higher is better, indicating parasympathetic dominance.
- RMSSD
- Root Mean Square of Successive Differences. The primary mathematical method used by the WMC to calculate HRV for scoring.
- Theta State
- Brainwave frequency between 4-8 Hz. Associated with deep relaxation, light sleep, and extreme inward focus.
- Delta Slip
- When an athlete accidentally enters Delta wave dominance (deep sleep). A foul that leads to disqualification if sustained.