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Aerobic Threshold Evaluation Using a Sweat Lactate Sensor in Healthy Women.

Tomonori Sawada1, Hiroki Okawara1, Shintaro Narushima1

  • 1Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan.

International Journal of Sports Medicine
|January 12, 2026
PubMed
Summary

A wearable sweat lactate sensor can assess aerobic threshold in women. However, delayed sweating can cause the sweat lactate threshold to lag behind the ventilatory threshold.

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Area of Science:

  • Exercise Physiology
  • Biomedical Engineering

Background:

  • Assessing aerobic threshold is crucial for exercise prescription.
  • Sweat lactate sensors offer a non-invasive method for monitoring exercise intensity.
  • Validation in women, especially those with low sweat rates, is needed.

Purpose of the Study:

  • To validate aerobic threshold assessment using a sweat lactate sensor in healthy women.
  • To investigate the relationship between sweat lactate threshold and ventilatory threshold.
  • To examine the influence of sweating dynamics on this relationship.

Main Methods:

  • Sixteen healthy women performed exercise tests with respiratory gas analysis.
  • A wearable lactate sensor monitored sweat lactate levels.
  • A ventilated capsule measured sweat rate.
  • Correlation and discrepancy analyses were performed.

Main Results:

  • Sweat lactate threshold was detectable in all participants using the sensor.
  • A significant correlation (r=0.769) was found between sweat lactate and ventilatory thresholds.
  • Sweat lactate threshold was significantly delayed compared to ventilatory threshold.
  • Late onset of sweating predicted the discrepancy between thresholds (r=0.873).

Conclusions:

  • Aerobic threshold assessment using sweat lactate sensors is feasible in healthy women.
  • Late-onset sweating is a key factor causing delayed sweat lactate threshold.
  • Further research may refine sensor use considering individual sweating patterns.