Depends, I'd say true however because sometimes incidents happen where contaminated products are sold to the public and consumed.
Exercise increases your overall health and your sense of well-being, which puts more pep in your step every day. But exercise also has some direct stress-busting benefits. It pumps up your endorphins. Physical activity may help bump up the production of your brain's feel-good neurotransmitters, called endorphins.
It could mean you are getting close to or coming off of your menstrual cycle(period)