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Table 1 Average muscle onset time in relation to hamstring onset for each subject.

From: Muscle recruitment patterns during the prone leg extension

Subject #

Right ES (1)

Left ES (2)

GM (3)

Hamstring (4)

Time Span (ms)

Order

1

29.3

8.8

-598.7

0

628

1243

2

-173.5

124.3

-96.8

0

173

2431

3

-13.8

-125.5

-676.5

0

676

4123

4

12

-1.3

-70.75

0

70

1423

5

-176.1

-126

-510.7

0

510

4213

6

-111.3

-151

-226.6

0

226

4123

7

22

14.6

-107.3

0

107

2143

8

59

-.25

-102

0

102

1423

9

-15.25

23.12

-131

0

131

2413

10

-46.7

-41.25

-269.5

0

269

4213

11

-227.5

5

-611.25

0

611

2413

12

-2.625

34.5

-407.6

0

407

2413

13

223.2

48.25

-469.12

0

692

1243

14

-42.6

116.8

-576.7

0

576

2413

Mean

-33.14

-5.01

-346

 

370.23

 

S.D

114.06

82.19

225.87

 

230.2

 
  1. Represents EMG onset times relative to hamstring firing. ES = Erector Spinae, GM = Gluteus Maximus, ms = milliseonds and SD = Standard Deviation.