Most days the hallway of my gymnastics studio is filled with small children and happy voices. You couldn't imagine a more pleasant community space. Some days though, long after the recreational classes are over and the sun has gone down, it's a hiding spot. I can't count how many times the pang of a coach's yell has brought a teammate to curling up in a corner and holding back tears. The emotional and immediate reactive effect of improper coaching culture has brought too many girls to those dark corners. What happens in that hallway is different from the slow internalization that shapes a gymnast's beliefs about herself over years. This is faster and rawer. It’s a nervous system response, triggered in real time, to a coach who has lost, or never had, control of their own emotional regulation. Where long-term harm operates like sediment, short-term emotional harm operates more like a shock. It floods a young body with cortisol and adrenaline, and it does so, over a competitive career, thousands of times. Sport psychologists studying youth athlete welfare have increasingly turned their attention to not just what coaches teach girls to believe about themselves, but what coaches do to their nervous systems, meet after meet, practice after practice. Reactive coaching behavior is best understood not as a personality flaw but as a pattern of dysregulation. A coach under pressure, which can be from an upcoming meet, a parent, an administrative body, or their own unresolved history in the sport, projects that pressure onto the nearest available target. Researchers in youth sport categorize these behaviors into recognizable types: verbal aggression (yelling, name-calling, sarcasm used as a weapon), physical intimidation (looming over an athlete, slamming equipment, throwing objects), and degradation (comparing a child unfavorably to teammates in front of the group, or humiliation designed to "motivate" through shame). What makes these moments distinct from ordinary correction is that they lack instructional value. A coach who yells "Point your toes!" is, however harshly, delivering technical, actionable, well-intentioned information. A coach who yells with no content at all (e.g. “Get off the floor!”) gives the child's nervous system a threat signal with no skill to fix and no target to aim for. There is only the fact of having been the object of an adult's ire. The body registers this the same way it registers any threat: fight or flight. For most young gymnasts, there isn’t an option to fight, so they flee. Hence the corner in the hallway. Emotional harm doesn't need years to leave a mark; it can restructure a child's felt experience of the sport within a single practice. Several effects consistently emerge, one of which is hypervigilance. Athletes in emotionally volatile environments learn to prioritize the tracking and maintenance of a coach's mood before their own wellbeing. A gymnast entering the gym will often scan for tone of voice, facial expression, and posture, even outfit. (I used to have a coach who, if she were wearing a certain shirt, I knew to be scared of that day). This is a form of environmental scanning that, while adaptive in the short term, is exhausting and harmful to sustain and diverts attention away from the training itself. These norms also come with performance anxiety distinct from competition nerves. There is a meaningful difference between the ordinary nerves of competing and the specific dread of disappointing an unpredictable adult. Gymnasts in reactive environments often report their anxiety peaks not during the routine, but afterward, in the walk back to the coach, waiting to learn which version of that person is about to greet them. A child who is regularly on the receiving end of unpredictable outbursts learns, correctly, that this particular adult cannot be relied upon for emotional safety. The harmful part is how easily this generalizes to teachers, future employers, and any authority figures who might raise their voice, even mildly, in an unrelated context years later. Gymnasts often develop emotional shutdown as a coping skill. Children exposed repeatedly to unpredictable adult anger often learn to suppress visible emotion entirely, since crying or protest has, in the past, escalated a coach's reaction rather than resolved it. In fact, crying or emotionally reacting can get you kicked out of the gym at times. It’s in my gym’s meet etiquette handbook that crying isn’t allowed at competition under any circumstances, and consequences include pulling you from the meet. What this culture creates can seem like resilience. It is, more often, a carefully learned repression, which clinicians sometimes describe as affective numbing. Additionally, short-term reactive stress isn't only psychological. Chronic activation of the stress response in developing children has documented links to sleep disruption, appetite changes, and somatic complaints (stomachaches, headaches) that often show up in a gymnast's life without anyone (parent, doctors, coaches) connecting them to emotional experiences in the gym. Because reactive coaching often masquerades as "intensity" or "passion for the sport," it can be difficult for parents, and even athletes themselves, to name it clearly. A few markers help distinguish ordinary correction from emotionally reactive coaching. For example, volume or intensity that is disproportionate to the actual stakes of the moment (genuine effort never requires a shouted discipline). Another is punishment that varies based on the coach's mood, the same mistakes drawing wildly different reactions. This is compounded when public humiliation is used as a primary tool, rather than private, actionable, relevant feedback. Athletes on the other end of emotional harm also show signs. Some might include withdrawal, physical and emotional, in order to regulate alone. They could have difficulty re-engaging with the same skill or the exercises generally for the rest of practice, even after the initial reaction fades. Gymnasts can show physical symptoms like shaking hands, stomach upset, or tension headaches that arise specifically around practice times. Lastly, after moments of outburst, flat or overly compliant behavior often reflects a shutdown response rather than genuine recovery. Short-term emotional harm is, in some ways, more tractable than long-internalized belief systems, because it lives in observable behavior that can be trained, supervised, and changed in real time. Coaching education has historically focused almost entirely on technical skill acquisition and biomechanics, with little to no instruction on managing one's own stress response under pressure. Programs that explicitly teach coaches to recognize their own escalation cues and to pause rather than explode directly reduce the frequency of reactive outbursts. Also, open-gym policies, rotating assistant coaches, and the simple presence of other trained adults during high-stakes training reduce the isolation in which reactive behavior tends to flourish. Emotional volatility is far less likely to go unchecked when it isn't happening behind a closed door. Lastly, building genuine, stated permission for an athlete to step away and regulate when overwhelmed without that being read as weakness, defiance, or a personal failure turns the hallway from a hiding place back into what it should be: a safe space to breathe before coming back in on her own terms. For parents, simply asking a gymnast, after a hard practice, how a specific interaction made her feel and believing the answer lets her know she trusts you if she starts feeling uneasy. This doesn't mean there has to be a therapist in the room (though access to one helps in some cases). The fix isn't teaching gymnasts to stop reacting, it's making sure the environment gives her nothing left to react to.