Keywords Performance Blood Adaptation Swimming Athletics Triathlon Get full text access Log in, subscribe or purchase for full access. References 1. Bassett, D.R. Limiting factors for maximum oxygen uptake and determinants of endurance performance: Medicine & Science in Sports & Exercise. 2000; 32(1):70 2. Webb KL, Gorman EK, Morkeberg OH, et al. The relationship between hemoglobin and VO2max: A systematic review and meta-analysis. Boullosa D, ed. PLoS ONE. 2023;18(10):e0292835.