Prolonged standing more quickly causes the development of fatigue in the muscles, this is an example of static work, when the same muscle groups are tense and the same neurons are excited. When walking, some muscles contract, others relax, the processes of excitation and inhibition also change in neurons, so fatigue occurs more slowly.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.