Final answer:
Increase training duration in a periodization plan after assessing tolerance and stress levels, potentially around the end of the first adaptation phase, while ensuring proper recovery protocols to avoid overtraining.
Step-by-step explanation:
The appropriate time to increase training duration in a periodization plan varies, but as a general guideline, adjustments are often made after an initial adaptation period. Given that stress increased for clients between months three and six, it may be wise to first assess tolerance and stress levels before further increasing training duration. It's important to allow sufficient time for recovery and adaptation to avoid overtraining and allow for progressive improvements. Conclusively, the period to increase training duration could be around the end of the first adaptation phase, if the client's response is positive, and after ensuring proper recovery protocols are in place.
In a periodization plan, training duration should be increased at specific intervals to allow for progressive overload and continued adaptation. One common approach is to break down the plan into phases or mesocycles, typically lasting 4-6 weeks. The initial mesocycle focuses on building a solid foundation of fitness, while subsequent mesocycles gradually increase the training intensity and volume. Within each mesocycle, training duration can be increased every 3-4 weeks, allowing the body to adapt and avoid plateauing.