Dr Lim Baoying, Sports Physician at Changi Sports Medicine Centre shared, “After perspiration is lost according to the level of physical activity, the humidity gradient difference between inhaled and exhaled air would cause the next largest source of body fluid loss. Hence, while exercising in a dry air-conditioned environment, we are still expected to have fluid loss though we may not feel as sweaty as compared to exercising outdoors. A proper hydration fluid like POCARI SWEAT ION WATER would therefore be a suitable option for people who are in a dry indoor environment throughout the day.”