Skeletal muscle gene expression in response to resistance exercise: sex specific regulation

BMC Genomics

Table 1 Physical characteristics of subjects.

Variables	Males (n = 8)	Females (n = 8)	p value
Age (yrs)	24.7 ± 0.8	22.7 ± 0.8	ns
Weight (kg)	76.9 ± 5.2	60.0 ± 5.2	0.02
Height (cm)	177.8 ± 3.3	156.2 ± 3.3	< 0.0001
BMI (kg/m2)	24.2 ± 1.7	23.7 ± 1.7	ns
1RM Trained Arm (kg)	16.7 ± 0.8	10.4 ± 0.8	< 0.0001
1RM Control Arm (kg)	12.6 ± 0.5	6.5 ± 0.5	< 0.0001
ISO Trained Arm (kg)	61.5 ± 3.4	29.2 ± 3.4	< 0.0001
ISO Control Arm (kg)	55.4 ± 2.9	25.3 ± 2.9	< 0.0001
CSA Trained Arm (cm2)	6949.3 ± 595.2	5837.1 ± 595.2	ns
CSA Control Arm (cm2)	6314.8 ± 553.3	5544 ± 553.3	ns
VOL Trained Arm (cm3)	642757.5 ± 53086.4	541118.8 ± 53086.4	ns
VOL Control Arm (cm3)	584923.6 ± 50638.3	516896.5 ± 50638.3	ns
Δ1RM relative to control	0.42 (0.29)	0.55 (0.50)	0.03
Δ ISO relative to control	0.10 (0.20)	0.13 (0.07)	ns
Δ CSA relative to control	0.08 (0.05)	0.05 (0.12)	0.08
Δ VOL relative to control	0.10 (0.09)	0.07 (0.10)	ns

Note: Anthropometric and muscle phenotypic measurements are presented as mean ± SEM and sex differences were tested by t-test.
Δ relative to control, relative improvement induced by RE training, calculated as (trained-control)/control; the numbers are median (interquartile range) and sex differences were tested by Wilcoxon Rank Sum Test.
1RM: 1 repetition maximum; ISO: Isometric muscle strength; CSA: Arm whole muscle cross-sectional area measured by MRI; VOL: Arm whole muscle volume.

ISSN: 1471-2164