Zone 2 cardio: Flaky fitness trend or worthy pursuit?
Reviewed by Brian St. Pierre, MS, RD “Cargo pants are back.” This was the news that Brian St. Pierre, PN’s director of nutrition, broke when we met. (St. Pierre, a father, found this out via his 12-year-old daughter.) Why does this matter? Apparently, a certain type of exercise is running a parallel cycle: An old…