ready to get in shape, let's talk about zumba. The 90's supersize craze.
Zumba pants were quite popular, right? And funny-looking?
yes, and was even award a trademark by zumba fitness. 
I wonder what popular clothing/lifestyle choices will seem silly 20 years from now.
its hard to say, the mix of dance and aerobic movements can seem funny, but they are effective. 
Did this exercise craze have any demonstrative positive effect on American public health?
I think the 15 million people who take classes every week see a benefit. 
That's an impressive number, but that doesn't mean it's beneficial.