We all know the feeling, right? That day when you head to the barn after a terrible day at work, your head full of problems, and your usually calm schoolmaster suddenly spooks at his own shadow. Or that moment right before entering the dressage arena or the show jumping ring, when your stomach ties in knots, and your horse starts refusing to cooperate already in the warm-up arena.

We often blame it on the horse having a "bad day," difficult conditions, the "weather," or just them being "silly." But science, specifically the latest research in ethology, neurobiology, and biomechanics, tells us something completely different: Horses don't read our minds, they just... read us biologically. And they do it with an efficiency that many laboratory machines would envy.

Here is what science says about the mechanisms through which your mood, temper, and stress become your horse's reality, and how it all translates to sports performance and everyday work.

1. Your Sweat Smells Like Fear. And the Horse Can Smell It (Olfaction)

Have you ever wondered why people say "the horse can smell your fear"? It turns out it's not a metaphor. It's pure biology.

In groundbreaking studies (e.g., by the INRAE and IFCE research teams), scientists collected scent samples from people watching horror movies (a state of intense fear) and comedies (a state of joy), and then presented them to horses. The results were astounding. Horses that sniffed the "scent of fear" (associated with the secretion of specific biomarkers, such as adrenaline) immediately entered a state of heightened arousal:

• Their willingness to interact with humans dropped drastically.
• They persistently stared at newly introduced objects more often (increased vigilance).
• Their heart rate increased, and their reaction to sudden stimuli was much stronger (the famous "spook and spin").

Practical takeaway: When you stress about an approaching combination or a difficult cross-country fence, your body starts emitting fear chemosignals. You broadcast a message: "Watch out, it's dangerous here!". Your horse senses this long before you even get near the obstacle.

2. When One Heart Beats (Heart Rate Synchronization and the "Umbrella Test")

The relationship you build with your horse can literally affect the heart rhythms of both of you. Horses naturally have a slower heart rate than humans. In a state of relaxation (thanks to the so-called polyvagal theory), they can actually act as a stabilizer for our stressed nervous system, lowering our blood pressure and promoting the release of oxytocin.

But this mechanism works both ways and can trigger a stress chain reaction.

In a famous experiment, known in the equestrian community as the "umbrella test" or "surprise test," researchers asked riders and handlers leading horses in hand to walk a certain distance. Before the final pass, they informed the humans that at some point an umbrella would be opened. The umbrella was never opened. And what happened?

The moment the human expected the umbrella to open, their heart rate increased. Immediately and simultaneously, despite the lack of any external stimulus, the horse's heart rate also increased.

Practical takeaway: If you're sitting in the saddle panicking, thinking: "He's going to spook at that judge's booth again," your hidden tension sends a flight signal to the horse. Paradoxically, your fear that the horse will spook is exactly what causes its fear.

3. The Body Doesn't Lie. The Invisible Armor of Tense Muscles (Biomechanics)

You can smile at your trainer and repeat: "Everything is fine!", but your body will tell the horse the whole truth.

Studies show that so-called emotional contagion almost completely fails to occur if a fearful person rigorously controls their body (Constrained-Style). The problem arises when fear brings involuntary, uncontrolled body language and changes in muscle tension.

When you are afraid (so-called somatic anxiety, often dominant in show jumpers and eventers), your breathing becomes shallow, and you tense your hip flexors and the psoas muscle. Your pelvis, instead of following the horse's movement elastically, blocks and turns into a rigid weight digging into the horse's back. The horse feels this as impacts, reacts with pain, shortens its stride, stiffens its neck, and stops working through its back. This is how the famous Losgelassenheit dies, the absolute foundation of the training scale, meaning freedom from physical and mental tension.

4. A Hard Hand, a Bad Score. How Much Does Your Stress Weigh on the Reins?

One of the most striking pieces of evidence of how our stress destroys cooperation with the horse comes from research on rein tension. Scientists use wireless force sensors (tensiometers) measuring in Newtons for this.

A nervous rider instinctively looks for support. Elbows lock, and hands grip the reins tightly, losing the contact that should be elastic (Anlehnung).

Studies conducted on numerous horses working in dressage revealed something incredible:

• When horses work "alone," they accept a soft resistance averaging around 7.5 N.
• When riders get on them, under the influence of stress, they can raise this average tension to an astronomical 24 N! At this level of force, horses dramatically often opened their mouths, tossed their heads, and swished their tails.
• What is important for athletes: it has been proven that a rider's hard hand significantly lowered the judges' evaluation of the horse's rideability. The higher the tension, the worse the score.

5. Competitions: Somatic Anxiety vs. Overthinking

Horses do not understand the concepts of "competitions," "judges," "medals," or audience evaluations. To them, the only variable is You.

What is interesting is how tournament stress is distributed across different disciplines:

• Dressage (Cognitive Anxiety): Riders often struggle with a paralyzing fear of evaluation and perfectionism ("overthinking"). Thinking too much leads to indecisive and delayed aids.
• Show Jumping and Eventing (Somatic Anxiety): Real fear for safety reigns here. Studies clearly show that experienced and elite eventing riders enter a mode of high focus without paralyzing somatic anxiety, which drastically reduces the risk of falls and allows the horse to fully trust before a massive, solid log on the cross-country course.

Of course, horses, being naturally flighty animals, react to noise, flapping banners, or new objects. However, studies prove that they do not feel abstract "tournament stress" at all. Their HRV parameters while waiting to start remained stable, they were not afraid of the judges or the prestige of the competition. The problem explodes when the horse's natural alertness in a new place meets the "scent of fear" and the blocked body of its own rider, who, instead of being a pillar of support, becomes the main trigger for panic.

Summary: Change Yourself to Change the Horse

Let's stop blaming horses for failures under pressure. Often, the mouthpiece of the bit or the amount of pressure doesn't matter when there is a terrified, tense human sitting on top. To achieve a harmonious, winning relationship with a horse, the work starts with us.

What can you do about it?

• Box Breathing: Control your breath! Deep belly breaths (inhale for 4 seconds, exhale for 8 seconds) inhibit the release of noradrenaline. The horse feels this calm movement of the diaphragm and begins to copy it.
• Visualization of Success: Work through your test or course in your head before getting on the horse, reducing mental chaos.
• Body Awareness (Constrained-Style): Control involuntary movements. Do not pinch the saddle with your thighs, relax your jaw and shoulders. If you master your body language and don't dig your nails into the reins, your horse will most likely take it as a sign: "If the leader is calm, there are no lions in the bushes".
• Targeted Nervous System Support: Sometimes mental techniques alone are not enough when the sympathetic nervous system takes over. Dominika Schulz-Wańczyk, a trainer from the professional boxing ring (where a mistake in managing emotions costs health) and creator of the equestrian project Equipeak, implements scientific support for athletes in the form of the Easy Rider supplement by Hempqualizer. As her tests under extreme pressure conditions have shown, a small pre-workout dose (0.5 ml) effectively quiets the anxiety that "burns out" an athlete before the start, and increases concentration without causing drowsiness or lethargy. Moreover, thanks to the support of the GABA system (e.g., through lemon balm), this product becomes a key element of the strategy for deep neurochemical recovery after competitions. In equestrianism, just as in boxing, a cool head and fractions of a second in reaction time determine safety and results. Importantly, this preparation is already successfully used by a wide range of athletes, and it also works fantastically on a daily basis, in highly stressful situations, such as important exams, difficult challenges at work, or simply overwhelming days.

And next time, before you change to a stronger bit or tighten the noseband, take a deep breath. It might just be enough to lower the "tension by a dozen Newtons" in your relationship.

Bibliography and Scientific Sources

The following list constitutes a selection of the most important peer-reviewed scientific publications on which the mechanisms described in the text regarding the horse-rider relationship and emotional contagion are based.

1. Chemosensory Pathways of Emotion Transmission (Olfaction)

• Lansade, L., et al. (2026/2023). Human emotional odours influence horses' behaviour and physiology. PLOS One. (Key studies by the INRAE and IFCE research teams, which proved on a sample of 43 horses that the isolated scent of human sweat induced by fear triggers a strong stress reaction in horses, reduces the initiative to initiate contact, and increases heart rate).
• Sabiniewicz, A., Tarnowska, K., Śmielak, M., et al. (2020). Olfactory Emotion Transfer in Human-Horse Interactions. Chemical Senses. (Research confirming that biochemical markers secreted during extreme emotional states in humans are recognized by the olfactory bulb of horses).
• Jardat, P., Lansade, L., et al. (2023). Joy or fear, horses sense our emotions. Horses discriminate human body odors between fear and joy contexts in a habituation-discrimination protocol. Animal Cognition.

2. Heart Rate Synchronization, HRV, and Emotional Contagion

• Keeling, L. J., Jonare, L., & Lanneborn, L. (2009). Investigating horse–human interactions: the effect of a nervous human. The Veterinary Journal, 181(1), 70-71. (The famous experiment featuring the "umbrella/surprise test", which proved that the mere anticipation of a threat by a human sitting in the saddle leads to an immediate increase in the horse's heart rate, despite the lack of an actual visual stimulus).
• Ille, N., Erber, R., et al. (2013). Cortisol release, heart rate and heart rate variability in the horse and its rider: different responses to training and performance. The Veterinary Journal, 197(2), 229-232. (Measurements of heart rate and the RMSSD parameter in milliseconds during training and in a competition environment. The study revealed a drastic drop in HRV and an increase in heart rate in human athletes under the influence of an audience, while the parameters of the horses remained the same as those in the warm-up arena).
• Lanatá, A., Scopa, C., et al. (2018). Quantitative EEG and Autonomic Responses towards Olfactory Stimuli... in Horses. (Studies documenting the mechanisms of the polyvagal theory and the phenomenon of heart rate coupling in interactions with humans).

3. The Role of Rider Body Language and Torso Motor Skills

• Scopa, C., et al. (2020/2024). Emotional contagion in human–horse interactions: A pilot study investigating the role of stress and body language in emotional transfer. (A fundamental study dividing participants into anxiety groups. It proved that the phenomenon of fear contagion in horses occurs almost exclusively when the human moves unrestrictedly (Free-Style), revealing stress through body language, and that blocking motor expression (Constrained-Style) prevents the transmission of stress to the horse).
• Merkies, K., et al. (2014). Eye blink rates and eyelid twitches as a non-invasive measure of stress in the domestic horse. (As well as related works by the team concerning reactions to nervous handlers). (Proof that horses react by lowering their heart rate, lowering their neck posture, and showing less activity when faced with extremely terrified humans subjected to psychological stress, indicating high cognitive empathy).

4. Biomechanics, Rideability, and Rein Tension

• Eisersiö, M., Byström, A., et al. (2015). Alternatives to Conventional Evaluation of Rideability in Horse Performance Tests: Suitability of Rein Tension and Behavioural Parameters. PLOS One, 10(12). (An analysis of dozens of horses regarding how objective sensors measuring in Newtons [N] correlate with rideability. It demonstrated a variance in mean tensions ranging from 9.1 N to 21.7 N depending on the rider's seat, and that these fluctuations account for a significant portion of the judges' scores).
• Christensen, J. W., et al. (2011/2020). Rein tension acceptance in young horses in a voluntary test situation. (Pioneering studies demonstrating a natural, completely comfortable tolerance for spontaneous rein resistance in the mount, and a sudden spike in resistance to over 24 N the moment the rider's stressful muscular tension appears).
• Byström, A., et al. (2010). Kinematics of saddle and rider in high-level dressage horses performing collected walk on a treadmill. Equine Veterinary Journal. (The impact of stiffness and a blocked pelvis (leading to a lack of Losgelassenheit) on pathologies in movement and the transfer of loads onto the horse's back).

5. Equestrian Sports Psychology: Pre-Competitive Anxiety and Endocrinology

• Wolframm, I. A., & Micklewright, D. (2010). Effects of trait anxiety and direction of pre-competitive arousal on performance in the equestrian disciplines of dressage, showjumping and eventing. Comparative Exercise Physiology, 7(4), 185-191. (Extensive research using the CSAI-2R scale to prove the differences between cognitive anxiety (overthinking) dominating in dressage riders, and somatic anxiety in show jumpers and eventers).
• Peeters, M., Sulon, J., et al. (2013). Comparison between blood serum and salivary cortisol concentrations in horses using an adrenocorticotropic hormone challenge. (Studies on the HPA axis response, cortisol release, and the concentration of this hormone depending on physical intensity and psychological load during competitions).
• Meyners, E. (2004). Rider fitness: Body and Brain. (A key publication from the field of kinesiology and the German riding school, discussing the use of breath, biofeedback, and the relaxation of the psoas major muscle to prevent the transmission of negative signals to the horse's back).