All the big organisms on the planet need a healthy supply or oxygen, yet there are a myriad organisms at the other end of the scale that either ignore oxygen or are actively averse to it. How come none of our large scale creatures have come from this anaerobic stock? [more inside]
posted by twine42 on Mar 27, 2009 - 16 answers

Tips for running? [more inside]
posted by mintchip on Jun 22, 2008 - 22 answers

How often and how hard do I need to work out in order to maintain the level of aerobic fitness I have right now? [more inside]
posted by slenderloris on Jan 9, 2008 - 9 answers

I tore a ligament in my ankle last night, and it looks like I'll be in a cast for at least three weeks. I hate to skip the gym for three weeks (I've been slacking off enough as it is, and I'm trying to lose weight). Are there any aerobic exercises that don't involve your legs and don't require special equipment? Something other than just throwing punches in the air? Thanks.
posted by Evangeline on Aug 1, 2007 - 15 answers

Criticize my gym regime! [more inside]
posted by long haired lover from liverpool on Jul 17, 2007 - 24 answers

Can I rebuild my lung capacity? And how? In the past two years, I have gone from being a high-level aerobic athlete - one to three hours daily of bike riding or running - to doing almost nothing. The reason? Respiratory problems. It started with asthma, went on to sinus infections, then two cases of pneumonia. I've had two sinus surgeries in the past six months. The good news is I am feeling better. The bad news is that my wind is shot... [more inside]
posted by soulbarn on Jun 29, 2007 - 10 answers

I'm working on improving my exercise habits, and I need some help on regulating them. How do I maintain useful aerobic exercise without going too light or too heavy? My body and my mind are fighting against me. [more inside]
posted by JZig on Jun 24, 2007 - 19 answers

Is walking at your normal walking rate, but increasing the distance you walk, sufficient enough to be considered exercise? Can anyone recommend exercises for people who are very underconditioned and extremely obese, but not in poor cardiac health? And, finally, is there a medical professional who is the equivalent of a gym's personal trainer? (More inside.) [more inside]
posted by anonymous on Jan 2, 2007 - 38 answers