What aspect, besides the weight of the object, determines the physical toll of moving freight?

Answer

The frequency of the task and the terrain over which the movement occurs

Cumulative strain is heavily influenced not only by the weight of cargo but critically by the repetition of the task and the nature of the ground or obstacles (terrain) encountered during movement.

What aspect, besides the weight of the object, determines the physical toll of moving freight?
jobcareerTransportationdemandphysical