Before justin's father remarried, justin was responsible for mowing the grass, putting the dishes in the dishwasher, and doing his own laundry. now that kim has married into the family, justin is not sure which of his responsibilities he should continue to do. justin is experiencinga. boundary ambiguity.
b. boundary strain.
c. cognitive dissonance.
d. role discontinuity.

People who utilizes the progression principle will ensure their exercise program increases in frequency, intensity, time, and type. the changes need to happen gradually in order to ensure they make gains in their fitness program. a person who doesn't utilize the progression principle can still gain health benefits from exercising, but will not continue to improve in cardiovascular fitness.