Long-term and Short-term Training Load and Training Fatigue

1. Chronic Training Load (CTL): The average TRIMP (Training Impulse) value over a longer period (e.g., the past 42 days). It is an important indicator for evaluating long-term training status and changes in athletic performance.
2. Acute Training Load (ATL): The average TRIMP value over the past 7 days. It reflects recent training load and fatigue status. Monitoring this can help identify the risk of overtraining and assist in faster recovery.
3. Training Stress Balance (TSB): Calculated by subtracting ATL from CTL, it provides a comprehensive reflection of the current fatigue state.

How to Interpret Them

By monitoring these three values, you can determine whether you are in a state of overtraining or undertraining and adjust your training plan accordingly to optimize your athletic performance.

• If TSB is negative, meaning ATL is higher than CTL, this may indicate that your recent training intensity is high, and you need more recovery time to avoid excessive fatigue or even injury.
• If TSB is positive, meaning ATL is lower than CTL, this may suggest that your body has adapted to the current training load, and you can gradually increase the training intensity to enhance athletic performance.