Keiji Sugiura* and Mariko Sugiura
Many physicians have warned of the risks of UV exposure during outdoor exercise. Outdoor exercise under sunlight, however, has not only adverse effects, but also many physical advantages. These include improved mental health, reduced mental stress, bone remodelling and increased muscle strength by increasing Vitamin D (25(OH) D3) levels, improved metabolism of glucose and lipids, growing up muscle mass and better skin by increased cortisol. Cortisol is also effective for antiaging by increasing antiinflammatory factors, up-regulation of antioxidant enzymes, and improved skin blood flow by heating. Outdoor exercise with UV exposure has some good effects on the skin and physical body; females with regularly exercise outdoors are often perceived to be younger than their age and to possess good skin brightness and tone.
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