A major new study exploring how different bridles affect horse behaviour and pressure distribution is seeking horse and rider combinations to take part in upcoming trials this May.
The research, led by an expert team including Dr Russell MacKechnie-Guire, Professor Hilary Clayton and Dr David Marlin, will compare horses ridden in a hackamore bridle with those in a traditional snaffle.
Using state-of-the-art measuring equipment, the study will assess behavioural responses, rein tension, and pressures on the noseband and headpiece, providing valuable insight into how different bridle types influence horse comfort and performance.
What the study involves
Participating horses and riders will be asked to ride in both a hackamore and a snaffle bridle, completing a short ridden test including walk, trot and canter, as well as transitions and turns.
To be eligible, combinations must:
- Compete in dressage or jumping using a snaffle bridle
- Regularly train in a hackamore
- Be confident and accustomed to working in both setups
Trials will take place on Wednesday, 6 May 2026, at Woolcroft Saddlery.
Why this research matters
Interest in bitless bridles such as hackamores continues to grow, but scientific evidence comparing them directly with bitted bridles remains limited. This study aims to provide objective data to better understand how different bridle designs affect horses during ridden work.
The findings could have important implications for training practices, competition rules and equine welfare.
The project is supported by World Horse Welfare, The Worshipful Company of Saddlers and Hartpury University.
How to get involved
Riders interested in taking part, or wanting more information on inclusion criteria, can contact the research team via email: russell.mackechnie-guire@hartpury.ac.uk
