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Table 1 Absolute values of all the tested variables before and after the 7-week static stretching intervention

From: Effects of a High-Volume 7-Week Pectoralis Muscle Stretching Training on Muscle Function and Muscle Stiffness

 

Intervention group (PMa-SS)

Control group (CG)

Effect size

PRE

POST

PRE

POST

PMa-SS

CG

Mean ± SD

Mean ± SD

Mean ± SD

Mean ± SD

Shoulder extension ROM (°)

68.6 ± 6.2

73.1* ± 7.7

68.5 ± 7.6

69.1 ± 5.6

d = 0.9

d = 0.1

MVIC at long muscle length (N)

288.9 ± 118.4

332.4* ± 117.0

267.5 ± 97.3

258.5 ± 100.3

d = 0.8

d = 0.03

MVIC at short muscle length (N)

339.3 ± 127.0

365.6 ± 124.7

320.0 ± 114.4

301.8 ± 118.0

F (group) = 0.8

F (interaction) = 2.8

Muscle stiffness at long muscle length (kPa)

9.9 ± 4.1

8.6 ± 2.4

10.4 ± 3.6

11.3 ± 4.6

p = 0.3

p = 0.6

Muscle stiffness at short muscle length (kPa)

7.5 ± 2.5

6.5 ± 2.1

7.3 ± 2.4

8.5 ± 5.1

p = 0.4

p = 0.5

  1. ROM, range of motion; MVIC, maximum voluntary isometric contraction peak torque; PMa-SS, pectoralis major static stretching training
  2. *Significant difference between pre- and post-values; α-level = 0.05