Energy bars and gels: Energy foods primarily deliver carbohydrates to your body, so you can maintain your performance during strenuous physical activity.
Carbohydrate gels are designed for instant sugar release into the blood stream, to get your levels topped up to their optimum. Energy bars contain slower release carbohydrates to keep you going for longer. A mix of both energy bars and gels is best for sustained good performance.
Carbohydrate drinks: Carbohydrate drinks provide a similar nutrient composition to energy gels; they contain a mix of fast-release carbohydrates that will quickly deliver fuel to your muscles. Taking carbohydrates in a drink format also has the benefit of aiding hydration; many carbohydrate drinks will also contain essential salts, to replenish those lost during perspiration and help avoid cramping.