Structured Therapeutic Exercise Significantly Improves Joint Mobility and Muscle Mass in Dogs

A new clinical study shows that structured therapeutic exercise significantly improves joint mobility and muscle mass in dogs with osteoarthritis, reinforcing its role as a cornerstone of multimodal management for veterinary patients.

Key Takeaways for Veterinarians

• Study cohort: 21 client-owned dogs with secondary osteoarthritis.
• Program duration: 5 weeks, 3 sessions per week, each lasting 60–90 minutes.
• Main outcomes:
  • Hip extension improved in 64.3% of joints, the most pronounced response.
  • Pelvic limb musculature showed the greatest gains, especially in the thigh (+0.90 cm mean increase).
  • Body weight remained stable, highlighting that improvements were due to exercise rather than weight loss.
• Clinical relevance: Structured exercise enhances passive range of motion (PROM) and muscle mass, supporting better mobility and quality of life.

Study Design

• Measurements:
  • Goniometry for PROM across shoulder, elbow, hip, stifle, carpus, and tarsus.
  • Limb circumference for muscle mass evaluation.
• Protocol phases:
  1. Warm-up: Cavaletti walking, slalom, figure-of-eight, sit-to-stand.
  2. Structured exercise: Box stance, balance disc training, cavaletti rails, dome proprioception, cone coordination.
  3. Cool-down: Leash walking and passive stretching.
• Progression: Exercises advanced only when dogs tolerated current levels without fatigue or pain.

Results in Detail

• Muscle mass:
  • Thigh: +0.90 cm (largest gain).
  • Crus: +0.71 cm.
  • Shoulder: +0.64 cm.
• Variability: Individual responses differed, but overall trends favored extension gains and pelvic limb strengthening.

Clinical Implications

• Integration into multimodal care: Exercise should complement NSAIDs, weight management, nutraceuticals, and environmental modifications.
• Targeted benefit: Hip extension gains are particularly valuable, as hip OA often limits extension more than flexion.
• Practicality: Exercises are not technically demanding but require correct execution under veterinary supervision.
• Owner compliance: Programs were well-tolerated, with no dogs discontinuing due to worsening signs.

Risks & Considerations

• Overloading joints can worsen OA signs; progression must be carefully monitored.
• Breed differences may influence PROM reference values—interpret results cautiously.
• Obesity management remains critical; weight reduction synergizes with rehabilitation.

This study provides objective evidence that structured therapeutic exercise improves joint mobility and muscle mass in dogs with osteoarthritis. For veterinarians, it underscores the importance of rehabilitation as a standard component of OA management, alongside pharmacological and lifestyle interventions.