Figure 1 An example (subject 1) of the oxygen uptake (VO) and vastus lateralis NIRS responses to constant-WR sub-q cycle ergometry. Δ[Hb], Δ[HbO] and Δ[HbT] represent the changes in [reduced haemoglobin], [oxyhaemoglobin] and [total haemoglobin], respectively (see text for details). The dashed vertical lines indicate the start and end of the exercise bout.