Table 2. Diameter, peak Ca²⁺ -activated force and peak force per fibre cross-sectional area of pre-and post-spaceflight type I soleus fibres.

	Diameter (μm)		Po (mN)		Po (kN m−2)
Subject	Pre	Post	Pre	Post	Pre	Post
A	98 ± 2	96 ± 2	1.03 ± 0.04	0.91 ± 0.03*	138 ± 4	127 ± 4†
B	108 ± 3	87 ± 2*	1.15 ± 0.06	0.69 ± 0.03*	127 ± 4	117 ± 2*
C	89 ± 2	82 ± 1*	0.82 ± 0.05	0.72 ± 0.03†	128 ± 4	135 ± 4
D	93 ± 2	86 ± 2*	1.02 ± 0.04	0.79 ± 0.03*	149 ± 4	136 ± 3*

Values are means ± S.E.M. of type I fibres. Number of fibres per subject same as in Table 1. P_o, peak isometric force.

^*P < 0.05.

^†0.10 > P > 0.05, post- vs. pre-flight.