Table 1.  Subjects characteristics according to the ACTN3 R577X genotypes. Values are means (± standard deviation).

Variables

 

RR (n= 50)

RX (n = 66)

XX (n = 25)

P

Age (years)

 

21.9 (2.1)

21.8 (2.6)

22.6 (4.3)

.265

Height (m)

 

1.76 (.07)

1.75 (.07)

1.74 (.06)

.210

Body mass

Pre (kg)

73.1 (13.7)

71.5 (14.8)

70.4 (12.6)

.716

 

Post (kg)

74.0 (14.8)

72.7 (16.4)

71.0 (10.6)

.813

Body mass index

Pre (kg·cm­-2)

23.5 (4.0)

23.3 (3.8)

23.3 (3.6)

.959

 

Post (kg·cm­-2)

24.0 (4.2)

23.4 (4.1)

23.2 (2.6)

.757

Knee extensors PT

Pre (Nm)

229 (43)

223 (35)

224 (27)

.608

 

Post (Nm)

243 (42) *

238 (37) *

241 (33) *

.739

Delta variation (%)

 

6.1

6.9

7.7

.926 **

Bench press 1RM

Pre (kg)

60.2 (14.6)

59.1 (12.7)

59.5 (17.5)

.909

 

Post (kg)

66.9 (12.9) *

66.3 (11.7) *

65.2 (13.1) *

.851

Delta variation (%)

 

11.1

12.3

9.6

.282 **

PT= peak torque; 1RM= one repetition maximum; *p < 0.05 between pre and post-training; **time by genotype interaction