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Table 4 Mean curve parameters of M. gluteus maximus (GlutMax), M. gluteus medius (GlutMed), lateral hamstrings (HamLat), medial hamstrings (HamMed), lumbar part of M. erector spinae (ErecLum), thoracic part of M. erector spinae (ErecThor), M. rectus abdominis (Abdo) and M. obliquus abdominis (Obli) for the eccentric and concentric phase of BE

From: Loading conditions in the spine, hip and knee during different executions of back extension exercises

   

GlutMax [% MVC]

GlutMed [% MVC]

HamLat [% MVC]

HamMed [% MVC]

ErecLum [% MVC]

ErecThor [% MVC]

Abdo [% MVC]

Obli [% MVC]

Eccentric

BEh

1L

17.4 ± 9.9

10.1 ± 5.2

11.9 ± 5.3

12.8 ± 9.7

13.6 ± 4.7

9.3 ± 5.5

2.5 ± 4

3.7 ± 4.4

2L

12.7 ± 7.0

7.2 ± 4.3

10.5 ± 5.4

9.6 ± 7.5

12.3 ± 4.6

9.8 ± 7.0

2 ± 2.2

3.8 ± 4.2

BEs

1L

17.9 ± 11.0

11.6 ± 6.0

13.8 ± 6.2

14.1 ± 11.2

13.7 ± 6.0

5.6 ± 4.8

3.2 ± 3.4

5.2 ± 5.5

2L

13.5 ± 7.6

8.2 ± 4.1

14.4 ± 6.5

12.2 ± 8.8

11.8 ± 6.2

4.5 ± 2.4

3.4 ± 3.3

5.1 ± 5.7

Concentric

BEh

1L

22.7 ± 12.7

13.5 ± 6.9

16.1 ± 7.1

16.4 ± 11.6

22.8 ± 8.2

9.7 ± 6.0

2.7 ± 3.9

4.6 ± 5.3

2L

16.5 ± 8.5

9.3 ± 6.0

16 ± 7.0

13.3 ± 10.0

18.9 ± 7.6

9.7 ± 7.7

2.1 ± 2.3

4.3 ± 4.6

BEs

1L

20 ± 12.1

13 ± 7.8

13.8 ± 6.8

13.6 ± 9.7

21.1 ± 9.4

7.6 ± 6.1

2.8 ± 3.3

5.1 ± 4.8

2L

15 ± 8.6

8.9 ± 5.6

14.4 ± 6.5

12 ± 8.3

17.6 ± 7.8

6.4 ± 4.6

2.9 ± 3.3

4.7 ± 4.9