Wind Cooling and wicking has a significant impact on cooling. A triathlon competitor on the cycle-leg with a higher speed (and more wind) will be able to remain cooler compared to the run-leg if they maintain the same power output but have a lower moving speed and thus a lower cooling effect from the wind.
Water Cooling by tipping a bottle of water over the head and body and even sprays or showers that may be available for some sports people can help slow the increase or core body temperature.
Sports Wear is relevant with regard to the material selection (cooling / wicking) as well as planning-ahead and 'shedding' warm layers of clothing in advance. Sports wear with integrated ice-packs for example can be used ahead of the race by athletes competing in short-distance races.
Hydration can also impact cooling and be timed (frequency or at key points in a race) as well as the temperature of the fluids.
Active cooling is also related to the strategy and pacing plan. Being familiar with the individual response and 'planning ahead' (for example depending on the course and conditions) is part of the active cooling approach.