Griffith park marks one of the greatest outdoor resource for us Angelenos. I have so many childhood memories of family picnics, the merry-go-round, and Sunday horseback riding trips including the first time I went on the fast pony on the pony loop, thanks for dad who told them I was 8 when I had just barely turned 6. Going up to the observatory to see the lights of the city and the stars was one of my most favorite things as a kid --
A recent article in Health gives insight to why walking up a set of stairs is much more challenging than jogging/running an equivalent distance. Even if your main cardio workout consists of running on a treadmill or regular 5-k races, it shouldn't be surprising if walking up a flight of stairs leaves you huffin' and puffin' for air. The article explains that this difference is due to the missing vertical element when running on flat ground.