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Levine, Benjamin D., and James Stray-Gundersen.“Living high-training low”: effect of moderate-altitude acclimatization with low-altitude training on performance.J. Appl. Physiol. 83(1): 102–112, 1997.—The principal objective of this study was to test the hypothesis that acclimatization to moderate altitude (2,500 m) plus training at low altitude (1,250 m), “living high-training low,” improves sea-level performance in well-trained runners more than an equivalent sea-level or altitude control. Thirty-nine competitive runners (27 men, 12 women) completed 1) a 2-wk lead-in phase, followed by 2) 4 wk of supervised training at sea level; and3) 4 wk of field training camp randomized to three groups: “high-low” (n = 13), living at moderate altitude (2,500 m) and training at low altitude (1,250 m); “high-high” (n = 13), living and training at moderate altitude (2,500 m); or “low-low” (n = 13), living and training in a mountain …