Strength training can help you run faster, longer and more efficiently. A study published last year in the Journal of Strength Conditioning Research showed that runners who add three days of resistance training exercises to their weekly program increased their leg strength and enhanced their endurance, which in turn helps runners run longer and burn more calories. This doesn't just go for runners. Strength training can help you bike, swim or just live stronger.
Link to blog: http://thefitdivas.typepad.com/my_weblog/2009/03/strength-training-can-help-you-run-faster.html