Hard, 3-2-1, the list goes on. And while some workout methods are more fluff than facts, others are rooted in real exercise ...

I tried the viral 6-6-6 challenge: walking an hour a day, six days a week, at 6 a.m. or 6 p.m. While it boosted my endurance and mood, fitting in six hour-long walks weekly was tough and left little ...