**) and strain (** **) behaviors.** (

**A**) Time evolution of

at different

*E*. Numbers in the legend indicate the values for

*E*.

increases rapidly at first but reaches a nearly constant plateau value (

) at ∼200 s regardless of

*E*. (

**B**)

(circles) and network stiffness (

*E* _{n}, triangles) as functions of

*E*.

monotonically increases for

*E*<3 kPa but saturates for

*E*>3 kPa. The network stiffness shows the same tendency as

for all

*E*. (

**C**) Contraction speed (

) as function of

*E*. The network contracts rapidly with low

*E* but more slowly as

*E* increases. (

**D**) Initial rate of stress increase (

) with different

*E*.

increases following

**∼** *E* ^{0.55} for

*E*<1 kPa and

**∼** *E* ^{0.16} for

*E*>1 kPa. (

**E**)

and corresponding strain (

) at various

*E*. Higher

corresponds to lower

. For high

*E*,

asymptotically approaches 0. (

**F**) A relation between normalized power (

*P*) and initial stress (

).

*P* becomes maximal at

*E*∼0.6 kPa, generating 40% of the maximum

and intermediate

of ∼0.015 s

^{−1}. Each color within the symbols in

**E** and

**F** indicates the value of

*E* in

**A** with the same line color.