If we are exhausted, we will take longer to recover and will do so with greater difficulty.
We must not wait until we are overcome by our exertions or are excessively tired in order to stop as this does not help recovery. We must keep up a pace which is achievable and independent of others in order to prevent saturation. If we are exhausted, we will take longer to recover and will do so with more difficulty. Walking must become something natural, which does not entail corporal punishment nor excess exertions; thus, in the same way that we measure out the intensity of the exercise we must measure out the stops so that walking becomes more bearable.