Which effects of nicotine use do most users experience? Check all that apply. Nicotine affects the pleasure centers of the brain, making it addictive.
Teens who smoke are less likely to smoke as adults.
People have to increase their nicotine use over time to receive the same effects.
People who want to quit are generally able to do so.
Stopping use leads to a tired feeling.

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.