exercise is a kind of physical activity & some types of new technology cause physical activity to decrease ->  some types of new technology cause exercise to decrease  decreasing something positive has a negative impact on a thing & exercise has a positive impact on a human 's health ->  decreasing exercise has a negative impact on a human's health  some types of new technology cause exercise to decrease & decreasing exercise has a negative impact on a human's health -> some types of new technology cause a negative impact on a human's health