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Facial Blood Flow Responses to Dynamic Exercise.
Naoyuki Hayashi1, Hideaki Kashima2, Tsukasa Ikemura1,3
1Institute for Liberal Arts, Tokyo Institute of Technology, Meguro-ku.
International Journal of Sports Medicine
|September 18, 2020
Summary
Dynamic exercise increases facial blood flow in most skin areas, but not the lip. This differs from static exercise responses, indicating region-specific vascular adaptations during physical activity.
Area of Science:
- Physiology
- Exercise Science
- Vascular Biology
Background:
- Previous research indicated static handgrip exercise causes regional variations in facial blood flow.
- Understanding facial blood flow during dynamic exercise is crucial for comprehending thermoregulation and physiological responses.
Purpose of the Study:
- To investigate if dynamic exercise, specifically cycling, elicits regional differences in facial blood flow.
- To compare facial blood flow responses during varying intensities of dynamic exercise.
Main Methods:
- 12 subjects performed 15-minute cycling sessions at 120, 140, and 160 bpm heart rates.
- Facial blood flow and vascular conductance were measured using laser speckle flowgraphy across forehead, eyelid, nose, cheek, ear, and lip.
- Statistical analysis included one-way ANOVA and Tukey's post-hoc test to assess exercise intensity and regional effects.
Main Results:
- Facial skin blood flow and vascular conductance significantly increased with exercise intensity.
- Lip blood flow and conductance showed significant increases at 120 and 140 bpm but returned to baseline at 160 bpm.
- Unlike static exercise, dynamic exercise demonstrated similar blood flow responses across most facial skin regions, excluding the lip.
Conclusions:
- Dynamic exercise induces intensity-dependent increases in facial skin blood flow.
- The lip exhibits a distinct vascular response to dynamic exercise compared to other facial areas.
- Facial blood flow regulation during dynamic exercise differs regionally, contrasting with static exercise patterns.
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