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The Relationship between Exercise Intensity and Lactate Concentration on the Skin Surface
Tetsuo Ohkuwa1, Kazuhiko Tsukamoto, Kazuaki Yamai
1Department of Material Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Showa-ku, Nagoya, Japan;
International Journal of Biomedical Science : IJBS
|May 16, 2013
Summary
Skin surface lactate concentration on working muscles increases with exercise intensity. This non-invasive measurement correlates with heart rate, offering a potential marker for individual exercise intensity monitoring.
Area of Science:
- Exercise Physiology
- Biochemistry
- Sports Science
Background:
- Lactate accumulation is a key indicator of metabolic stress during exercise.
- Non-invasive methods for monitoring exercise intensity are valuable for training and performance analysis.
Purpose of the Study:
- To investigate the relationship between skin surface lactate concentration and heart rate during graded cycling exercise.
- To determine if skin surface lactate can serve as a reliable indicator of exercise intensity.
Main Methods:
- Sixteen healthy males performed continuous graded cycling exercise.
- Skin surface lactate concentration was measured on the rectus femoris muscle using ethanol-soaked containers.
- Heart rate and lactate levels were recorded at rest, during exercise stages, and during recovery.
Main Results:
- Lactate concentration on the skin surface significantly increased with higher exercise intensities (p<0.05 or p<0.001).
- Significant negative correlations were observed between skin surface lactate and heart rate at various exercise intensities (r=-0.52 to -0.74, p<0.05).
Conclusions:
- Increased skin surface lactate on working muscles is linked to elevated exercise intensity and heart rate.
- Skin surface lactate concentration shows potential as a personalized biomarker for monitoring exercise intensity.
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