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Running is more than just putting on a pair of running shoes and hitting the road. Get information about stretching, strength-training, cross-training, and proper running form, plus check out useful fitness calculators.  For many competitive runners, the 30-minute effort/pace workout is one of the most critical quality workouts of their training plan.

When it's too hot and humid to run outside, the treadmill is a great alternative. If you're finding that you're suffering from extreme treadmill running boredom, try some of these tips.

I've thought for a long time that running is addicting, and I know that a lot of other runners agree with me. Well, now it seems that a bunch of rats are proving this running addiction theory to be correct.

Researchers at Tufts University gave naloxone, a medicine for heroin overdose that produces immediate withdrawal symptoms, to rats that ran in exercise wheels. The rats showed withdrawal symptoms like those seen in narcotics addicts. And the rodents that ran the hardest had the most severe withdrawal symptoms.

The scientists found that the rats showed similar behaviors to rats addicted to drugs. "Exercise, like drugs of abuse, leads to the release of neurotransmitters such as endorphins and dopamine, which are involved with a sense of reward," noted lead author Robin Kanarek, PhD.

But don't let a potential addiction be another excuse to not run. "As with food intake and other parts of life, moderation seems to be the key. Exercise, as long as it doesn't interfere with other aspects of one's life, is a good thing with respect to both physical and mental health," said Kanarek.

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