Efficacy of an Oral Chondroprotective Joint Supplement on Stride Length and Gait Symmetry in Aged Geldings with Chronic Lameness.

Overview

• This study evaluated whether an oral joint supplement containing glucosamine and chondroitin sulfate improved stride length, gait symmetry, and lameness in older geldings with chronic lameness over a 6-week period.
• The results showed no significant benefit of the supplement compared to a placebo, indicating the tested supplement did not improve joint function or reduce lameness in the horses during the study timeframe.

Study Background and Objectives

• Oral joint supplements (OJSs) are commonly given to horses, especially those with joint problems, with the goal of improving joint health and reducing lameness.
• These supplements often contain ingredients like glucosamine and chondroitin sulfate, which are thought to support cartilage health.
• Despite their popularity, there is limited in vivo scientific evidence demonstrating their effectiveness in horses.
• This study aimed to rigorously test the impact of an OJS on stride length, gait symmetry, and lameness severity in aged geldings suffering from chronic lameness.

Study Design and Methods

• Forty geldings, averaging 18 years old and exhibiting chronic lameness grades between 2 and 4 (moderate to severe), were enrolled.
• Inclusion criteria involved veterinary evaluation of lameness using the American Association of Equine Practitioners (AAEP) scale.
• Horses were categorized based on lameness grade, body condition score (BCS), and weight to ensure balanced groups.
• Participants were then randomly assigned to receive either a placebo powder or the oral joint supplement daily for six weeks.
• Stride length and lameness evaluations were conducted every two weeks during the study period.

Measurements and Outcomes

• Stride Length: Measurement of how far the horse moves with each step at both walk and trot.
• Gait Symmetry: Assessment of evenness in limb movement to detect lameness-related irregularities.
• Lameness Grade: Veterinarian-assigned score indicating severity of lameness.

Key Results

• There was no significant difference in stride length between horses receiving the supplement and those receiving the placebo.
• Stride length did change over time (day effect), but this was unrelated to treatment.
• Lameness grades also changed over time, with the lowest average lameness recorded on day 28, but this effect was not connected to treatment group.
• No improvement in gait symmetry was observed in horses receiving the supplement compared to placebo.
• The lack of a treatment-by-day interaction indicates no lasting effect of the supplement on measured parameters throughout the study.

Conclusions and Implications

• The oral joint supplement tested did not demonstrate efficacy in improving stride length, gait symmetry, or lameness grades over a six-week period.
• This suggests that this particular formulation may not provide measurable benefits for chronic lameness in aged horses within this timeframe.
• The findings highlight the importance of conducting well-controlled, randomized studies to evaluate commonly used nutraceuticals in veterinary medicine.
• The study supports ongoing research and development of evidence-based approaches for managing equine joint health.