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Table 5 Shoulder press exercise muscle activation levels (% MVC, standard deviation in brackets) average difference between surfaces and number of participants whose change in activity was greater than 5% MVC.

From: Replacing a Swiss ball for an exercise bench causes variable changes in trunk muscle activity during upper limb strength exercises

Surface

Muscles studied during shoulder press exercise

 

Rectus Abdominis

External Oblique

Internal Oblique

Erector Spinae

Ball

6.01 (6.29)

4.1 (5.4)

21.7 (31.5)

3.7 (3.3)

Bench

6.9 (9.6)

3.5 (3.6)

15.2 (15.2)

13.4 (30.3)

Difference

-.98 (4.29)

.6 (2.59)

6.52 (30.23)

-1.07 (4.62

Increase

0

1

1

0

Decrease

1

0

3

1