. 2005 Dec 22;571(Pt 2):425–439. doi: 10.1113/jphysiol.2005.099697

Table 2.

Group mean changes in contractile function measurements from baseline at 2.5, 35 and 70 min postexercise for control (CTRL) and inspiratory muscle unloading (PAV)

	CTRL				PAV

Variable	Baseline	2.5 min	35 min	70 min	Baseline	2.5 min	35 min	70 min
Q_tw,peak
1 Hz,np (N)	152 ± 13	105 ± 7^**	124 ± 9^**	133 ± 10^**	145 ± 14	108 ± 10^**	125 ± 12^*	136 ± 12
(%Δ)		(−30 ± 3)^**	(−18 ± 3)^**	(−12 ± 2)^**		(−25 ± 3)^**^†	(−13 ± 3)^**^†	(−6 ± 3)^†
1 Hz,pot (N)	204 ± 17	124 ± 9^**	162 ± 13^**	175 ± 13^**	199 ± 18	131 ± 9^**	166 ± 13^**	181 ± 15^*
(%Δ)		(−38 ± 4)^**	(−20 ± 2)^**	(−13 ± 2)^**		(−33 ± 3)^**^†	(−16 ± 3)^**	(−8 ± 3)^*
Mean of 1, 10, 50, 100 Hz (N)	221 ± 16	155 ± 11^**	183 ± 13^**	193 ± 14^**	211 ± 17	162 ± 15^**	186 ± 17^**	201 ± 17
(%Δ)		(−28 ± 4)^**	(−16 ± 3)^**	(−12 ± 2)^**		(−23 ± 4)^**^††	(−12 ± 3)^**	(−5 ± 3)^†
Q_tw,T2
Mean of 1, 10, 50 100 Hz (N)	137 ± 9	97 ± 8^**	112 ± 6^**	120 ± 9^**	130 ± 10	104 ± 11^*	117 ± 11^*	128 ± 11
(%Δ)		(−28 ± 5)^**	(−17 ± 4)^**	(−12 ± 3)^**		(−20 ± 5)^**^††	(−10 ± 3)^*	(−2 ± 3)^†
10 Hz/100 Hz	1.08 ± 0.06	1.00 ± 0.07	0.92 ± 0.05^**	0.99 ± 0.05	1.07 ± 0.06	0.98 ± 0.08	0.91 ± 0.05^**	1.00 ± 0.04
(%Δ)		(−7 ± 5)	(−14 ± 3)^**	(−7 ± 3)		(−9 ± 5)	(−15 ± 3)^**	(−5 ± 3)
MVC
MVC (N)	567 ± 53	410 ± 68^*	500 ± 43	523 ± 44	560 ± 65	417 ± 55^*	484 ± 50^*	495 ± 44
(%Δ)		(−28 ± 9)^*	(−9 ± 7)	(−6 ± 7)		(−22 ± 8)^*	(−12 ± 3)^**	(−8 ± 6)
Activation (%)	92 ± 1	85 ± 4^*	85 ± 3^*	91 ± 2	90 ± 2	85 ± 3	91 ± 3	93 ± 2
(%Δ)		(−8 ± 4)^*	(−8 ± 3)^*	(−2 ± 2)		(−5 ± 4)	(1 ± 2)	(3 ± 2)

Mean ±s.e.m.n = 8 per group.

P < 0.05

^**

P < 0.01, significantly different from baseline value.

^†

P < 0.05

^††

P < 0.01, significantly different from CTRL at corresponding time.

Values in parentheses represent percentage changes from baseline values. Q_tw,peak, peak quadriceps twitch force; np, non-potentiated; pot, potentiated; Q_tw,_T2, peak quadriceps twitch force for the T2 response; MVC, highest force averaged over 1 s during maximal voluntary contraction; Activation, level of voluntary drive during MVC measured using twitch interpolation.