TABLE 2.

Coefficients of the elastic net model for selected variables contributing to the biological age (FitAge).

FitAge coefficients
Variable	Coefficient (SDs)
TUG time	2.23
Handgrip strength	−1.98
6MWT distance	−1.11
Fast walking 10MWT time	0.95
4SST time	0.23
Quadriceps strength	−0.19

Abbreviations: SDs, standard deviations; TUG, timed up and go test; 6MWT, 6-min walk test; 10MWT, 10-m walk test; 4SST, four square step test. Coefficients indicate the standardized weight of each motor test in the construction of the biological/fitness age. Coefficients equal to zero indicate no contribution to the biological aging measure.