Physical performance levels, also known as readiness, are known to fluctuate wildly on a daily or even hourly basis. Lifestyle stressors, sleep quality, nutrition, hormonal fluctuation and general arousal levels can have a significant impact on strength, power, speed and fitness. These variations can make standardised percentage based training programs difficult to implement and often suboptimal for helping athletes maximise their performance over time.Coaches, sporting organisations and individual athletes typically monitor their daily readiness levels in order to auto-regulate their training loads and volumes. Technologies such as heart rate variability monitoring, GPS data, blood oxygen sensors, along with subjective readiness questionnaires and regular performance testing is used to adjust and calibrate the optimal training stresses on a daily basis.Velocity tracking can be a vital tool in the auto-regulation of training too. As an athlete trains, coaches can receive and analyse training data for their warm up sets, comparing their velocity and power outputs relative to individual testing baselines or recent contextual training data. Drops in velocity relative to normal during these warm up sets can signify fatigue or low readiness to train, prompting intervention and training load adjustments to match this low readiness to train.