Imagine that you have a large amount of work to do and you give it to 1 member of staff...
Now, consider sharing that same amount of work amongst 100 members of staff?
Instead of 1 staff member working extra hard to do the job, 100 people are working together.
The job will be done more quickly and each individual has less of the overall responsibility for completing the job.
Conventional muscle use involves a limited number of muscles being assigned to a given task.
Whole-body power entails all of your muscles being used together.
Consequently, the task feels less strenuous and is more easily fulfilled.