Maintaining comfortable body temperature during exercise in 40F (4C) weather requires strategic layering to manage sweat and retain heat. This involves selecting moisture-wicking base layers, insulating mid-layers, and wind- and water-resistant outer shells as needed. Appropriate choices vary depending on individual factors like exertion level and personal preference.
Proper attire for cold-weather running promotes performance and prevents discomfort, injury, and cold-related illnesses like hypothermia. Effective thermoregulation allows runners to maintain optimal body temperature, maximizing efficiency and minimizing the risk of overheating or excessive chilling. Historically, athletes have utilized layered clothing for warmth and protection in challenging weather conditions, with modern athletic wear incorporating advanced fabrics and designs for enhanced performance.