08/28/2026
Why Late Summer Heat Creates Surprise Tension Spots
Horses compensate differently when they’re hot, dehydrated, or mentally fatigued from the weather. I know here in the Tucson desert, there is no escape from the heat in the peak summer months. I found out first-hand this summer how my horse began having a hard time in this heat. Here is what I found in some research on this matter:
Heat stress changes how horses regulate their bodies - Horses under heat stress are more likely to brace, shorten stride, and develop tension in predictable areas — especially the poll, sternum, ribs, and hind end.
Heat + exercise increases biochemical markers linked to muscle strain - Under hot conditions, horses show muscular fatigue and tension.
Heat stress reduces the body’s ability to dissipate tension - When heat accumulation exceeds dissipation, horses enter a state of heat stress, which can lead to altered movement, guarding patterns, and compensatory posture. This may be why you see tension pop up in unexpected places — the horse is bracing to stay cool and conserve energy. My horse began breathing really fast!
Dehydration affects tissue elasticity - Heat stress is strongly associated with dehydration, which reduces the elasticity of soft tissues (including fascia) and increases stiffness.
Research tells us:
• Heat stress alters muscle metabolism → more fatigue → more tension
• Horses compensate differently when hot → predictable bracing patterns
• Dehydration reduces tissue elasticity → fascia becomes “stickier”
• Nervous system activation under heat → increased guarding
If your horse is moving differently this week, you’re not imagining it. Your first call should always be to your veterinarian to ensure your horse’s overall health is good and to discuss the goals you have for your horse. At the end of the day, their well-being is the most important thing. Once your vet has ruled out medical concerns, massage can help address the tension your horse may be holding — especially the heat related tightness that shows up.
Massage supports comfort, improves mobility, and helps your horse move more naturally again.
Autumn, my horse, is doing fine now. My Vetinarian and I have discussed our plan of action given her age and health to get through the rest of the summer. Keep safe and cool! https://www.lorisequinemassage.com/
Research Articles
https://www.frontiersin.org/journals/veterinary-science/articles/10.3389/fvets.2025.1734969/full?utm_source=copilot.com
https://research-repository.griffith.edu.au/items/1afa67cf-de44-4b71-a821-a3541ac0ae16?utm_source=copilot.com
Lori's Equine Massage uses the hands to feel muscle tension, tightness, spasm areas, and trigger points. Massage therapy helps increase circulation, get more oxygen and nutrients through muscles, which in return gets horses moving and feeling better!