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Heat affects speed of horses more than humans - study
The researchers analysed three international races in which humans and horses were pitted against each other.
Scientists analyse the effect of ambient temperature on running speeds.

A study by researchers at the University of Roehampton suggests that the speed of horses deteriorates in hot weather faster than it does in human beings.

Scientists analysed the effect of ambient temperature on the running speeds of humans and horses in races where the two species were pitted directly against each other.

Race times from three ‘Man v. Horse’ international races involving 260 humans and 358 horses with riders on courses of over 30 km in length were analysed. Researchers also looked at ambient race-day temperatures from archived weather records at the nearest weather station of similar elevation.

They found that for every 1ºC increase in ambient temperature on the day of a race, the pace of the horses decreased by on average 0.11 km/h. For humans, it decreased by 0.07 km/h - a 36 per cent smaller decrease.

At the highest race day temperatures, the quickest human runners were nearly as fast as the fastest horses.

Commenting on the findings, professor Lewis Halsey from the University of Roehampton and co-author independent researcher Dr Caleb Bryce, said: “Horses have superior cardiovascular systems to humans so it is not surprising that they are typically faster than humans in a head-to-head race. Yet the time gap between the two closes on hotter days.

“This finding was sometimes subtle but always apparent in each of the three race events we analysed. In simple terms, humans sweat more readily so they have an in-built cooling system which mitigates the effect of the heat. Horses are bigger, and don’t dump heat as effectively.”

They continued: “Although it’s a dying tradition, some human populations have hunted successfully by out-enduring their prey, running down large animals over the course of many hours in the heat of the day. It’s contentious as to whether humans are adapted specifically to do this, but the man versus horse data does suggest that humans are relatively well equipped to endure long-distance running at high temperatures.”

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Practices urged to audit neutering data

News Story 1
 RCVS Knowledge has called on vet practices to audit their post-operative neutering outcomes.

It follows the release of the 2024 NASAN benchmarking report, which collates data from neutering procedures performed on dogs, cats and rabbits.

The benchmarking report enables practices in the UK and Ireland to compare their post-operative outcomes to the national average. This includes the rate of patients lost to follow-up, which in 2024 increased to 23 per cent.

Anyone from the practice can submit the data using a free template. The deadline for next report is February 2026.

Visit the RCVS Knowledge website to complete an audit. 

Click here for more...
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New guidance for antibiotic use in rabbits

New best practice guidance on the responsible use of antibiotics in rabbits has been published by the BSAVA in collaboration with the Rabbit Welfare Association & Fund (RWA&F).

The guidance is free and has been produced to help veterinary practitioners select the most appropriate antibiotic for rabbits. It covers active substance, dose and route of administration all of which are crucial factors when treating rabbits owing to the risk of enterotoxaemia.

For more information and to access the guide, visit the BSAVALibrary.