Front. Physiol. Frontiers in Physiology Front. Physiol. 1664-042X Frontiers Media S.A. 1738830 10.3389/fphys.2025.1738830 Correction Addendum: A novel estimate of biological aging by multiple fitness tests is associated with risk scores for age-related diseases Manca et al. 10.3389/fphys.2025.1738830 Manca A. 1 ‡ Writing - original draft Writing - review and editing Data curation Supervision Fiorito G. 1 ‡ Morrone M. 1 Formal Analysis Writing - review and editing Data curation Writing - original draft Boi A. 1 Writing - original draft Writing - review and editing Mercante B. 1 Martinez G. 1 Ventura L. 1 Writing - review and editing Writing - original draft Delitala A. P. 2 Cano A. 1 Catte M. G. 1 Solinas G. 1 Melis F. 1 Ginatempo F. 1 https://orcid.org/0000-0001-8235-6091 Deriu F. 1 3 * † Supervision Writing - original draft Funding acquisition Writing - review and editing Project administration Resources Department of Biomedical Sciences, University of Sassari, Sassari, Italy Department of Medicine, Surgery and Pharmacy, University of Sassari, Sassari, Italy Unit of Endocrinology, Nutritional and Metabolic Disorders, AOU Sassari, Sassari, Italy Correspondence: F. Deriu, deriuf@uniss.it

ORCID: F. Deriu, orcid.org/0000-0001-8235-6091

These authors have contributed equally to this work

 19 12 2025 2025 16 1738830 03 11 2025 14 11 2025 24 11 2025 Copyright © 2025 Manca, Fiorito, Morrone, Boi, Mercante, Martinez, Ventura, Delitala, Cano, Catte, Solinas, Melis, Ginatempo and Deriu. 2025 Manca, Fiorito, Morrone, Boi, Mercante, Martinez, Ventura, Delitala, Cano, Catte, Solinas, Melis, Ginatempo and Deriu https://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. An Addendum on A novel estimate of biological aging by multiple fitness tests is associated with risk scores for age-related diseases by Manca A, Fiorito G, Morrone M, Boi A, Mercante B, Martinez G, Ventura L, Delitala AP, Cano A, Catte MG, Solinas G, Melis F, Ginatempo F and Deriu F (2023). Front. Physiol. 14:1164943. doi: 10.3389/fphys.2023.1164943 biological age-chronological age aging cardiovascular diseases 6-min walking test timed “up and go” test ten meter walk test handgrip test section-in-acceptance Integrative Physiology

The formula by which Fitness Age is calculated was not reported in the section Results, Fitness age definition and components, below table 2:

“ F i t A g e = 66.48 − 2.23 *   T U G t i m e − 6.69 1.38 − 1.98 *   H a n d g r i p n o r m a l i z e d − 0.37 0.11 − 1.11 * 6 M W T d i s t a n c e − 502.38 74.94 + 0.95   *   F a s t 10 M W T t i m e − 4.75 0.93 + 0.23 * 4 S S T t i m e − 3.67 0.81 − 0.19 * S t r o n g e r Q u a d S t r e n g t h n o r m a l i z e d − 0.56 0.13

Where means (µ) and standard deviations (σ) were computed on this dataset:

TUGtime (s): µ = 6.69; σ = 1.38

Handgripnormalized (by bodyweight in kg): µ = 0.37; σ = 0.11

6MWTdistance (m): µ = 502.38; σ = 74.94

fast10MWTtime (s): µ = 4.75; σ = 0.93

4SSTtime (s): µ = 3.67; σ = 0.81

StrongerQuadStrengthnormalized (by bodyweight in kg): µ = 0.56; σ = 0.13”

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