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15
votes
4answers
5k views

Why does cardio/aerobic exercise lead to muscle loss?

Recently, I've been reading a lot about how cardio reduces muscle mass and strength. The following is an excerpt from crossfit.com that seems to sum up what I've been reading: Aerobic training ...
12
votes
2answers
2k views

What does it actually mean “anaerobic pulse zone”?

Can someone put in human terms what does it mean to work out in "anaerobic pulse zone"? Update: I mean anaerobic heart rate in context of running on a treadmill. I'm 26 and while running on 12km/h ...
4
votes
2answers
114 views

What do we mean by “aerobic” and “anaerobic”?

I'm sure there are lots of us who aren't so clear on the distinction "aerobic" and "anaerobic": exercise, running, conditions, and so on. So: what is the difference between the two?