Fig. 1.

DCS BFI and muscle oxygenation during maximal-effort knee-extension exercise (top) and whole-body cycling exercise (bottom). (a), (c) Changes in DCS BFI (fold-change above baseline; FC) from a representative subject recorded throughout 2 min of resting baseline, high-intensity exercise, and 10 min of passive recovery. (b), (e) Group changes in DCS BFI (fold-changes for both) during exercise and throughout recovery. (c), (f) The decreases in muscle oxygenation that were observed during exercise. Note that in both cases, DCS showed little-no change above baseline despite substantial decreases in muscle oxygenation, indicating that the muscle mass beneath the DCS probe was indeed active. Group data are presented as mean ± SD.