• Stress & Nervous System

    Your brain during a panic attack

    A panic attack can feel sudden, overwhelming, and physically intense. Heart rate increases. Breathing changes. Thoughts speed up. The body reacts as though something dangerous is happening, even when there is no immediate threat present. What’s happening is not just “panic” in a general sense. It’s the brain and nervous system moving into a high-alert survival response. What happens in the brain? During a panic attack, the brain shifts attention toward threat detection and survival. Areas involved in fear and danger processing become more active, while systems linked to rational thinking and long-term perspective become harder to access in the…

  • Energy & Performance

    Inside the body during Hyperbaric Oxygen Therapy

    Inside the Body During Hyperbaric Oxygen Therapy Hyperbaric oxygen therapy, often called HBOT, changes how oxygen moves through the body. Inside a hyperbaric chamber, air pressure increases while the body breathes oxygen at much higher concentrations than normal. This changes the amount of oxygen the blood can carry — and how deeply oxygen can move into tissues. What happens inside the chamber? Under normal conditions, oxygen is mainly carried through the blood by red blood cells. Inside a hyperbaric chamber, increased pressure allows more oxygen to dissolve directly into the blood plasma itself. This means oxygen can move more widely…

  • Sleep & Recovery

    What 72 hours of sleep deprivation does to the brain

    What 72 Hours of Sleep Deprivation Does to the Brain The brain depends on sleep to regulate attention, memory, mood, and recovery. After one poor night of sleep, the effects are usually manageable. After 72 hours without proper sleep, the brain begins operating very differently. Attention becomes unstable. Thinking slows down. Emotional regulation changes. The nervous system starts struggling to maintain normal cognitive function. What happens during the first 24 hours After a full day without sleep, the brain begins accumulating significant sleep pressure. Attention and reaction time often become less reliable: The body may still feel functional, but cognitive…

  • Stress & Nervous System

    What Cortisol Actually Feels Like

    Cortisol is often described as a “stress hormone,” but that label doesn’t fully explain the experience. It’s not something you directly feel in isolation. Instead, you feel its effects through changes in energy, attention, mood, and physical tension. It’s the body’s way of shifting into a more alert, responsive state when something needs attention. What cortisol is doing in the body Cortisol follows a natural daily rhythm. It rises in the morning to help wake the body up and support alertness. It also increases in response to stress, helping the body stay functional under pressure. In short: It becomes noticeable…

  • Energy & Performance.

    Energy & Performance

    Energy is involved in everything the body does. Here you’ll find simple explanations of terms related to energy production, fatigue, metabolism, recovery, and performance. ATP (Adenosine Triphosphate) ATP (adenosine triphosphate) is a molecule cells use to store and transfer energy. Often described as the body’s energy currency, ATP helps power processes including movement, thinking, repair, and cellular function. Related: Burnout Burnout is a state of physical, mental, and emotional exhaustion associated with prolonged demands or stress. It can affect energy, motivation, focus, performance, and the ability to recover. Related: Cellular Energy Cellular energy refers to the energy produced and used…

  • Stress & Nervous System

    Stress & Nervous System Glossary

    Stress and the nervous system influence how we respond to challenges, regulate emotions, recover, and adapt to the world around us. This glossary provides clear explanations of key concepts related to stress, nervous system function, hormones, emotional regulation, resilience, and the biological processes that shape how we experience everyday life. A Acute StressAcute stress is the body’s short-term response to an immediate challenge, pressure, or perceived threat. It activates systems that increase alertness and prepare the body to respond. When the challenge passes, the body can usually return towards its normal state. AdaptationAdaptation is the process of adjusting to changes,…