Table 1.

Muscle resting tension

Force	Time	C57BL/6 WT (n = 9)	KO (n = 10)	FVB WT (n = 15)	TG (n = 19)
	min
Resting force (mN) (P vs. WT control)	0	78.7 ± 1.5	74.8 ± 1.2 (P = NS)	75.7 ± 0.6	77.8 ± 2.4 (P = NS)
Δ versus baseline (P vs. baseline)	7	−8.7 ± 1.7	−5.8 ± 3.1 (P = NS)	−6.3 ± 0.6	−2.3 ± 1.4 (P = NS)

Resting tension of in situ TA muscle is measured at time 0 (baseline) and at 7-min duration of the 1-Hz isometric twitching protocol. KO and TG mice are compared with their respective C57BL/6 and FVB controls. Measurements at time 7 min are expressed as the difference versus measurements at time 0 (p-values are for KO or TG vs. their WT controls using Student’s t test).