Based on the above, it puts forward that fatigue is the current object of practice, the training is not effective without fatigue and high-quality training is to create the limit of fatigue.

阐述了训练与竞赛、疲劳与恢复之间的辩证关系及对营养补剂本质的认识，提出疲劳是运动训练的近期目的，没有疲劳的训练是无效训练，高质量的训练旨在创造最大限度的疲劳程度。

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But they assume that replacement teachers can be hired without limit, with no increase in compensation, from the same quality distribution from which current teachers are drawn.

FORBES: Compensating Teachers for Riskier Jobs