“Recent studies conducted by the Institute of HeartMath provide a clue to explain the bidirectional “healing” that happens when we are near horses. According to researchers, the heart has a larger electromagnetic field and a higher level of intelligence than the brain: A magnetometer can measure the heart’s energy field radiating up to 8 to 10 feet around the human body. The horse’s electromagnetic field is also stronger than ours and can directly influence our own heart rhythm! While this is certainly significant, it is perhaps more impressive that the electromagnetic field projected by the horse’s heart is five times larger than the human one (imagine a sphere-shaped field that completely surrounds you).
Horses are also likely to have what science has identified as a “coherent” heart rhythm (heart rate pattern) which explains why we may “feel better” when we are around them. . . .studies have found that a coherent heart pattern or HRV is a robust measure of well-being and consistent with emotional states of calm and joy–that is, we exhibit such patterns when we feel positive emotions.
A coherent heart pattern indicates a system that can recover and adjust to stressful situations very efficiently. Oftentimes, we only need to be in a horse’s presence to feel a sense of wellness and peace. In fact, research shows that people experience many physiological benefits while interacting with horses, including lowered blood pressure and heart rate, increased levels of beta-endorphins (neurotransmitters that serve as pain suppressors), decreased stress levels, reduced feelings of anger, hostility, tension, and anxiety, improved social functioning; and increased feelings of empowerment, trust, patience, and self-efficacy.”