2-yr old Thoroughbreds in Training


In Jan, 2016, 58 horses from the same yard were divided into 2 groups and housed under either the Equilux lighting system or traditional stable lighting in individual stalls. All horses were on the same training programme that gradually increased in intensity from week 0 to week 15 and consisted of a single exercise bout each day between 7 and 10 am. 

Feed composition and energy density was consistent for all horses and there was an equal numbers of colts and fillies in each group. Data on weight and % fat composition were collected at 3‐week intervals and FatFree Mass (FFM) calculated for each horse. 

Changes in weight, body fat and FFM over time in horses in training housed under the Equilux system or traditional stable lighting. 



 Horses maintained under the Equilux lighting system had a significantly (P< 0.01) higher FFM compared to control horses after 15 weeks of training. This was correlated with higher weight (P< 0.01) and improved coat condition. FFM is positively related to maximal aerobic capacity in horses and can be viewed as an important indicator of performance.