这是一个环环相扣的过程用英语怎么说

This is a chain effect, the more junk food you eat, the heavier you become. Therefore, the less exercise you do, the lazier you are.

This is a process that spiraling down. The more junk food you eat, the heavier you become, and then you don't want to do exercise, finally become more and more lazy.

This a vicious circle.The junk food make you fatter and fatter then you have less and less wish to exercise and become more and more lazy.