If marlene were having difficulties with digestion, the best things to do would be to

Having difficulties with digestion is not an easy problem for a person. What a person can do who is suffering from this mishap is to be careful with foods that trigger this problem like acidic, spicy and fatty foods. One must also try to eat less and not binge eat and keep a moderate pace in terms of eating.  

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.

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