Hot to trot: Equine heat issues researched for Tokyo 2020 Olympics

The Ready Steady Tokyo test event in August was won by Olympic champion Michael Jung (GER) with Fischerwild Wave
Results from the FEI’s horse monitoring research project conducted at the Ready Steady Tokyo test event in August have been published. The eventing test event was won by Olympic champion Michael Jung with Fischerwild Wave. © FEI/Yusuke Nakanishi

Horses competing at the Tokyo Olympic Games next year have an array of science available to help them cope with what is expected to be a hot and humid environment.

A major research study commissioned by the FEI took place at the Ready Steady Tokyo Test Event in August 2019. The results of the study, aimed at identifying best practices and management of horses training and competing in hot and humid environments, have been published today.

Led by the FEI’s climate expert Dr David Marlin, the study monitored the combined effects of long travelling times and distances, time zone disruptions, and heat and humidity on competing horses.

Horses were monitored before and during the test event, including how they adapted to the challenging climate in Tokyo. Central to the report is data collected on-course and post-competition, which allowed for detailed analysis of the cross-country test.

The study findings show that horses generally coped extremely well with the conditions and remained in good health for the duration of the test event, held at the same time of year as the Games in 2020, despite the fact that conditions were thermally challenging, with Wet Bulb Globe Thermometer (WBGT) Index readings frequently in the region of 32-33°C. The WBGT index is used to measure heat, humidity, solar radiation and wind factor.

Thermal images of horses competing were analysed in a variety of ways.
Thermal images of horses competing were analysed in a variety of ways.

The report confirms that on cross-country day (August 13), the high WBGT index, steep initial climb and sharp turns on the course produced a significant challenge for competing horses. Heart rates during cross-country, and blood lactate, heart rate and rectal temperature after cross-country, indicated that horses were working at close to maximal capacity.

A new heart rate monitor that also displays the ECG, plus infra-red thermal imaging to provide a rapid and accurate estimate of horses’ temperature, were key pieces of technology used in data collection for the study. The technology was made available through the FEI’s partnerships with Epona Biotec, Arioneo, Equestic and Polar.

The report highlights that “all possibilities must be explored to mitigate the effects of the likely climatic conditions, including reduction in distance appropriate for the conditions and bringing the cross-country start time forward to avoid the highest WBGT conditions that would normally peak between late morning and mid-afternoon”.

Following discussions between the Tokyo Organising Committee of the Olympic and Paralympic Games (TOCOG), the IOC and the FEI, consensus has been reached on advancing the cross-country start time to either 7.30am or 8am on August 2, 2020 as part of the heat countermeasures. A final decision on the move, which is fully supported by the findings in the Marlin report published today, will be made by the IOC Executive Board.

“We have worked very closely with TOCOG to put in place the best possible heat countermeasures for both our equine and human athletes for Tokyo 2020, and the findings in this important research study will play a crucial role in guiding final decisions on appropriate facilities and support,” FEI Veterinary Director Göran Akerström said. “The report will also be a valuable tool for athletes and National Federations as they prepare their horses in the build-up to and during the Olympic and Paralympic Games.”

The Tokyo Olympic 2020 cross-country course.
The Tokyo Olympic 2020 cross-country course.

Heat countermeasures that are already in place for horses include air-conditioned stables at both equestrian venues (Bajikoen and Sea Forest), early morning and evening training and competition sessions under floodlights, constant and close monitoring by a world-class veterinary team, and multiple cooling facilities including the provision of shade tents, cooling fans, ice and water, and mobile cooling units.

The FEI has been working on optimising equine performance in challenging climates with Marlin since before the Atlanta 1996 Olympic Games. Marlin has been working with the FEI for the past three years specifically on Tokyo, reviewing historical climate records, analysing data collected at the main venue at Bajikoen (EQP) and at the cross-country course at Sea Forest (SFC), and leading the test event research project.

The findings from the research project have been sent to TOCOG, the IOC, all National Olympic and Paralympic Committees with athletes competing in equestrian sport, and all National Federations affiliated to the FEI.

IOC visits Olympic sites

The International Olympic Committee’s Coordination Commission spent three days this week checking on the readiness of Tokyo for the Games. Central to the meeting was discussions over the change of the marathon and race walk events to Sapporo, 900km north of Tokyo, because of climate issues.

Other key topics during the three-day meeting, included transport, operational readiness and legacy.

Tokyo 2020 has achieved a succession of important milestones over the last several months, including the unveiling of the Ariake Gymnastics Centre. With its opening, only three venues remain to be completed, all of which are more than 85 per cent finished. This includes the Olympic Stadium, which received praise after the IOC Coordination Commission members toured the facility.

The Commission members, together with IOC Member and Chair of the Legacy and Sustainability Commission Prince Albert II of Monaco, emphasised the importance of ensuring that thorough legacy plans are in place well ahead of the Olympic Games.

Several stakeholders of the Olympic and Paralympic movements also joined the Coordination Commission visit. These included National Olympic Committees – the British Olympic Association, the NOC of Zambia, the New Zealand Olympic Committee and the United States Olympic and Paralympic Committee – and TOP partner representatives, Coca-Cola, Panasonic and Toyota.

Latest research and information from the horse world.

One thought on “Hot to trot: Equine heat issues researched for Tokyo 2020 Olympics

  • July 21, 2021 at 5:00 am

    I note with interest that at the study it was noted that horses were working just below the critical level, and the course temp was 30-33 degrees c. The current temperatures are 40 degrees c no one anticipated this, what is the ioc doing to reduce risks to horses in light of this?
    I am impress by the temperature and heart rate monitoring done remotely, surely this should be done during the competition to each horse at set points while going round and any horse over recommended temps and or heart rate should be stopped on course.


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