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Winter training and ski marathons place serious demands on the body.In cold conditions, your body burns significantly more energy — not only for movement, but also to maintain core temperature. That’s why a successful finish requires more than just good fitness or the right skis. In this article, we share practical advice on how to fuel with carbohydrates before the start, when to take energy on the course, and why consistent fueling helps you maintain pace in the final kilometers and recover faster after the effort. ⚡ Training for a ski marathon?All SiS energy gels are currently –20% — the perfect time to stock up on high-quality fuel for race day.👉 Find the right fuel for the course 1. Why does the body burn more energy in winter? When exercising in cold environments, the body must produce heat in addition to powering movement. This increases overall energy expenditure compared to warmer conditions — your body is essentially working double duty to maintain core temperature and muscle function. As a result, winter marathons and long training sessions place a noticeably higher load on the body, and energy stores are depleted more quickly. In ideal conditions — when we’ve eaten and hydrated well beforehand — carbohydrate...