Figure 1. The fatigue-induced prolonged low-frequency force depression in rat FDB fibres is due to decreased myofibrillar Ca2+ sensitivity.
Mean data (± s.e.m.) of the relative change in tetanic force (A; n = 11) and [Ca2+]i (B; n = 9). Relative changes were calculated as ratio 30 min after (recovery) to before (control) fatiguing stimulation; dashed lines indicate no change.