Figure 3

Allometrically scaled oxygen uptake (ml kg^-0.83min^-1) across [Hb] group (<10 g dl^-1, 10 to 12 g dl^-1, >12 g dl^-1);$\dot{\mathbf{V}}{\mathbf{O}}_{\mathbf{2}}$peak (A) and at the anaerobic threshold (AT) (B). Mean +/- SD values adjusted for weight, testing site, age, sex, revised cardiac risk index, diabetes, creatinine and operation category. P <0.0001 (ANOVA) and trend (P <0.0001) for both measures. Hb, haemoglobin concentration.