Running birds

Primary function (force)

Gastrocnemius

0.81 ± 0.14

0.14

0.33

2.5

0.85

0.29

brake (eccentric)

Digital flexors (DF)

0.76 ± 0.22

−0.0.3

0.21

3.6

0.78

0.19

motor (concentric)

Femorotibialis

0.80 ± 0.12

−0.02

0.18

4.4

0.78

0.20

motor (concentric)

Overall group

0.79 ± 0.16

0.03

0.24

3.3

0.77

0.26

brake (eccentric)