Journal of equine veterinary science · 2026
Short-term effects of pulsed electromagnetic field therapy on subjective flexion-associated lameness responses and circulating cytokines in horses with distal tarsal osteoarthritis.
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Wilson Isla, Kiger Kate, Reynolds Sarah, Justice Megan, Kapadia Carmen, Coleman Stephen J, Crook Rebecca A, Fedorka Carleigh E
Аннотация
BACKGROUND: Pulsed electromagnetic field (PEMF) therapy is commonly used in equine sports medicine for its proposed anti-inflammatory effects; however, limited controlled studies have evaluated its physiologic effects in horses.
AIMS/OBJECTIVES: The objective of this study was to investigate the effects of PEMF therapy on flexion-induced lameness and circulating cytokines in horses with radiographic evidence of distal tarsal osteoarthritis.
METHODS: Six mares were enrolled in a repeated-measures crossover design in which each horse served as its own control. Horses were evaluated at baseline (sham PEMF) and at 1 hour, 1 day, and 1 week following a single PEMF treatment. Lameness was assessed subjectively by a blinded veterinarian following standardized tarsal flexion testing and objectively using an inertial sensor-based gait analysis system (Lameness Locator®, Equinosis). Serum cytokines were quantified using a multiplex immunoassay.
RESULTS: PEMF treatment reduced the subjective flexion-induced lameness response 1 hour following treatment (1.83±0.17 vs. 1.00±0.26; p=0.03); however, no differences were identified at 1 day or 1 week. Objective gait asymmetry was not altered by PEMF treatment (p=0.67). Circulating IFNγ concentrations decreased 1 hour following PEMF exposure (1319.1±373.9 pg/mL vs. 863.1±227.1 pg/mL; p=0.05), while other cytokines were unchanged.
CONCLUSION: These findings suggest PEMF therapy may induce transient effects on inflammatory signaling and subjective pain responses in horses with distal tarsal osteoarthritis, although objective gait asymmetry remained unchanged.
AIMS/OBJECTIVES: The objective of this study was to investigate the effects of PEMF therapy on flexion-induced lameness and circulating cytokines in horses with radiographic evidence of distal tarsal osteoarthritis.
METHODS: Six mares were enrolled in a repeated-measures crossover design in which each horse served as its own control. Horses were evaluated at baseline (sham PEMF) and at 1 hour, 1 day, and 1 week following a single PEMF treatment. Lameness was assessed subjectively by a blinded veterinarian following standardized tarsal flexion testing and objectively using an inertial sensor-based gait analysis system (Lameness Locator®, Equinosis). Serum cytokines were quantified using a multiplex immunoassay.
RESULTS: PEMF treatment reduced the subjective flexion-induced lameness response 1 hour following treatment (1.83±0.17 vs. 1.00±0.26; p=0.03); however, no differences were identified at 1 day or 1 week. Objective gait asymmetry was not altered by PEMF treatment (p=0.67). Circulating IFNγ concentrations decreased 1 hour following PEMF exposure (1319.1±373.9 pg/mL vs. 863.1±227.1 pg/mL; p=0.05), while other cytokines were unchanged.
CONCLUSION: These findings suggest PEMF therapy may induce transient effects on inflammatory signaling and subjective pain responses in horses with distal tarsal osteoarthritis, although objective gait asymmetry remained unchanged.