Runner's World tested eight energy gels for endurance athletes, ranking products by performance metrics like carbohydrate delivery, sodium content, and palatability during extended efforts.
The publication evaluated gels on glycogen replenishment capacity, osmolarity (fluid absorption rate), and real-world digestibility. Products varied significantly. Some gels delivered 20-25 grams of carbohydrates per packet. Others contained 50-100mg sodium for electrolyte balance. Flavors ranged from fruit-based to caffeinated formulations offering 20-35mg caffeine per serving.
Runner's World separated proven formulations from marketing claims. The testing addressed specific runner needs. Athletes hitting 90+ minutes required sustained carbohydrate intake to maintain pace and prevent bonking. Sodium content mattered for sweat rate management and preventing hyponatremia in long efforts.
Gel selection hinged on individual gut tolerance and race strategy. Some runners benefited from double-carbohydrate protocols combining gels with sports drinks. Others performed better with single-fuel approaches.
The review provided actionable data for marathon and ultramarathon preparation. Athletes could now match products to training responses rather than relying on sponsorship marketing or anecdotal claims from running forums.