1. Deep Heat Relaxes Muscles

The high temperatures in a sauna (typically 50–70°C) raise the temperature of the skin and muscles.

The heat promotes the softening of collagen and elastin in muscle fibers, reducing stiffness.

The increased temperature also suppresses muscle spasm signals, allowing overcontracted muscles to relax.

Used after exercise, it helps relieve soreness and swelling caused by lactic acid accumulation.

2. Dilates Blood Vessels and Improves Circulation

High temperatures dilate subcutaneous blood vessels and capillaries, increasing blood flow.

Increased blood circulation means more oxygen and nutrients are delivered to muscles and joints.

At the same time, metabolic waste products (such as lactic acid and carbon dioxide) are more quickly eliminated, reducing fatigue. Click here to learn more