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Fig. 5 | Frontiers in Zoology

Fig. 5

From: Vertical leaping mechanics of the Lesser Egyptian Jerboa reveal specialization for maneuverability rather than elastic energy storage

Fig. 5

Tendon stress and elastic energy storage. Data from a single individual is represented by a unique symbol. Data from all individuals were grouped together to calculate the trendlines. a Tendon stress as a function of ground reaction force. Plantaris tendon p=0.001, F=16.13, adjusted R 2=0.387; digital flexor tendon p=0.001, F=16.13, adjusted R 2=0.387; achilles tendon p=1.299e−7, F=56.12, adjusted R 2=0.697. b Tendon energy contribution (for two hindlimbs) to the total energy of the leap, calculated from the potential energy at peak leap height. c Single leg tendon energy contributions as a function of ground reaction force. Plantaris tendon p=0.0002, F=18.52, adjusted R 2=0.422; digital flexor tendon p=0.0002, F=18.52, adjusted R 2=0.422; achilles tendon p=1.341e−6, F=41.82, adjusted R 2=0.630. d Jerboa tendon energy contribution to total limb mechanical work (forward locomotion in all cited studies, except for kangaroo rat vertical jumping) or CoM work (vertical leaping in jerboas) compared to other species. Dog data from [41], kangaroo and wallaby data from [7], ostrich and human data from [42], horse data from [8], kangaroo rat forward hopping data from [10]. Tendon energy recovery in the kangaroo rat during vertical jumping was estimated to be 8.6-fold greater relative to hopping, calculated by comparing muscle-tendon stresses during forward hopping versus vertical jumping [10, 11]

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