High blood sugar levels can impair physical activity by affecting energy levels and performance. Elevated glucose may lead to fatigue, decreased endurance, and potentially hinder muscle recovery. For those with diabetes, managing blood sugar is crucial; if levels are too high, exercise can exacerbate complications. Furthermore, high blood sugar can contribute to dehydration, which negatively impacts exercise capacity. Maintaining stable blood glucose through proper nutrition and regular exercise enhances overall fitness and supports better workout outcomes.