Failing to fully grasp what is best in terms of primal exercise
I walk to university 3x a week.
One-way is 2.5km, or 1.5 miles. It takes me about 45 minutes one-way since there are steep hills along the way, and a huge hill that the university sits on.
I am 21, female, 5'6" and 165lbs.
I used to be incredibly out of shape, 230lbs.
The first time I walked to school, I arrived to class beet-red, soaked with sweat, and ready to pass out... friggin' hills.
After much persistence I have slowly built up my walking ability. The hike to class that use to make me stop multiple times along the way, and leave me breathless, now only works up a very light sweat.
Here's the question:
I own a bike. I have maybe ridden that bike a grand total of five times.
(I over-estimated my fitness level when I bought it, remember my initial challenge with walking, let alone biking!)
I wouldn't mind riding my bike to class now that I actually have the strength to do so.
However, which exercise is actually healthier for me?
Mark disapproves of heavy cardio, stating that it releases stress hormones, yada yada...
Is biking considered too 'fast' for the 'moving slowly' rule?
Time is no real concern to me. My walking has never interfered with any other schedule. I don't mind if I walk 90 minutes round-trip versus biking 30 minutes round-trip.
I'm just wondering which mode of transportation is better for furthering my goals of over-all health.
There aren't many problems in life that can't be solved by sleeping it off, or adding more butter.