When I read one of the other news stories with more details, it said:
"Vigorous-intensity activities include running, biking, swimming, exercise or dance classes, and strenuous sports."
It sounds like they are taking mainly cardio that lifts your heart rate up quite a bit. Or HIIT / crossfit could also do it.
One advantage of using the gym, I get a log in history. I tend to over estimate how much exercise I am getting unless I look.
I know I spend about 2 hours at the gym, but this includes about 45 min that I am not exercising. If I do cardio, it's not longer than an hour, though I often hit 96% of my peak heart rate. Almost all the time I go 15 times a month, or 3.75 times a week, or maybe 280 min a week.
If the weather is good, I bike. Typically I bike an hour, but not every day, so maybe 0-5 times a week. I keep a yearly track of mileage, but this bike I only got late last year and only have 632 miles on it. Which at 12 mph is about 52 hours.
I know i don't typically do 450 mins a week even if it feels like it.
