Sugar can significantly influence energy levels during exercise by providing quick, readily available calories. However, excessive consumption may lead to energy crashes and decreased performance. Simple carbohydrates, like those found in sugary snacks, can fuel workouts but may result in rapid spikes and drops in blood sugar. This can negatively impact stamina and focus. For sustained energy during exercise, opting for complex carbohydrates, such as whole grains and fruits, is more beneficial, promoting steadiness and improved performance.