Live·Open questions in longevity research

Indicator or biomarker

Sweat secretory response

A measure of sweat gland secretion in response to stimulation

Hypotheses on this target 5

Sweat secretory responseTelling states apart. Hypotheses on this target 11Direct measurement. Hypotheses on this target 11Indicator replacement. Hypotheses on this target 0

Telling states apart1

  • Mismatched measurements can create the apparent benefit of reducing sweat

    Where this hypothesis actsSkin assessed with dry-air capsules versus minimally perturbing instruments under native microclimate conditions

    What is proposedDistinguish native excess sweat secretion from measurement-induced apparent excess

    With whatInstrument or assay

    HowCompare capsule and native-microclimate assessments with co-registered measurements, calibrated humidity and airflow, and independent heat and water balances

    Possible resultExpected disappearance of apparent excess secretion and cooling-preserving suppression benefits under native conditions

    2026-09-21

Direct measurement1

  • Selecting skin samples by final stiffness may create a false link between past load and sweating

    Where this hypothesis actsSweat glands after mechanical loading and an intervention that normalizes average skin stiffness

    What is proposedAssess changes from baseline without selecting samples by final stiffness

    With whatInstrument or assay

    HowAnalyze all randomized samples with adjustment for baseline secretion and a prespecified equivalence margin; analyze selection by final stiffness separately

    Possible resultPossible absence of a loading-history effect when all randomized samples are analyzed

    2026-09-25