Head Strong

Head strong by Dave Asprey presents a step-by-step guide on how to boost mental performance, improve focus and achieve peak energy. Asprey, a pioneer of biohacking and founder of the Bulletproof brand, draws on his own experience and extensive research to offer readers practical strategies for optimizing the brain and body. The book is designed as a two-week plan that relies on the principles of science-based biohacking, nutrition, and healthy living. Asprey's approach is not just theoretical; it is concrete, immediately applicable steps that anyone can take to improve their physical and mental well-being. The author explains why mitochondria, the tiny "energy powerhouses" in cells, are essential for mental and physical stamina. These "machines" in our bodies can, with proper care, supply the brain with energy and keep it in a state of peak performance. Asprey's two-week plan combines adjustments in diet, sleep habits, regular exercise, and mental training to teach readers how to strengthen these mitochondria and get the best out of themselves.

Mitochondria, those tiny "power plants" in our cells, are the foundation of our physical and mental health. Think of them like the engine of a car - if the engine is running smoothly, the whole car has a stable and efficient ride. Similarly, our bodies and brains depend on the quality of the "energy" that mitochondria produce. However, when mitochondria are not functioning properly, we experience fatigue, impaired concentration and less vital energy. Interestingly, thanks to advances in medicine, we now know how to influence their functioning. For example, in 2006, Dr Bruce Ames, an American biochemist and nutrition expert, came up with a study that showed that proper nutrition can increase energy production in the mitochondria while slowing down the ageing process of cells. Ames proved that substances such as coenzyme Q10 or carnitine directly boost the efficiency of the mitochondria and thus our brain performance. At the same time, mitochondria are extremely sensitive to stress and toxins that we ingest in our diet or from the environment. For example, pesticides or preservatives commonly found in food are a major problem. Just as a car that has been neglected gradually loses performance, mitochondria will gradually succumb to the effects of toxic substances if we do not keep them 'clean'. A dietary change in which we increase our intake of quality fats and minimize refined carbohydrates can promote mitochondrial health and keep us energized for long hours. Quality fats from avocados, nuts or olive oil will provide the brain with steady energy, while high doses of sugar cause a rapid increase and subsequent decrease in energy. To provide the best environment for the mitochondria, we can also use "mitochondrial restarts" such as intermittent fasting or exposure to cold. These methods can stimulate the mitochondria to perform better - similar to an athlete improving in their sport through regular training. Thus, an investment in mitochondrial health is an investment in our mental and physical resilience. With just a small effort, our "brain engine" can gain greater efficiency and performance that we feel in every area of life.

Asprey's focuses on diet as the main weapon for increasing energy and mental performance. According to this concept, diet is the cornerstone of our vitality, ability to focus, and resistance to fatigue. The diet he proposes is based on the concept of the so-called "Bulletproof diet" - a diet high in healthy fats and minimal carbohydrates designed to support stable energy levels throughout the day. When it comes to the right fats, these are the real "fuel" for our brains. An example is coconut oil, rich in medium-chain fatty acids (MCTs), which our bodies convert into energy very efficiently. Such fats can provide the brain with a constant supply of energy without the rapid fluctuations that carbohydrates cause. It's no coincidence that many experts, such as Dr. Rhonda Patrick, believe that good quality fats are crucial for optimal brain function. When the brain is supplied with energy from fats, it undergoes what is called ketosis, a condition in which the body draws energy from fat stores instead of glucose. Such a state promotes mental clarity and stamina. Instead of the typical "energy crashes" during the day, ketosis provides steady and long-lasting energy. In everyday life, this can mean better handling of work stress and less impulsive decisions. Asprey also points out that a high intake of carbohydrates, especially processed ones, leads to blood sugar spikes that can cause lethargy and trouble concentrating. Refined carbohydrates from foods such as sweets or white pastries provide the body with a quick but short-lived source of energy, which quickly wanes and causes fatigue. An interesting example is the story of an experiment in removing carbohydrates from the diet of an American executive who suffered from chronic fatigue and concentration problems. After switching to a fat-oriented diet, he experienced a dramatic improvement - not only did he feel more energetic, but his work performance and concentration improved dramatically. This nutritional strategy emphasizes quality and sources of food - healthy fats, fresh vegetables, and quality proteins. The goal is to create an "energy foundation" that will support not only the body, but more importantly the mind and its ability to process and respond to challenging stimuli without being overwhelmed.

Intermittent fasting is one of the key ways to boost mental performance, boost metabolism and improve overall health. Intermittent fasting involves eating food only during a specific window of time, with the body in a fasting state for the rest of the day. This approach, according to many studies, has a positive effect on cell regeneration and also increases brain resilience. Try to imagine that our brain needs time to rest in order to process all the information and prepare for the next challenges. Intermittent fasting essentially allows the body to "reset" itself. An example of this can be seen in Dr. Sachin Panda's 2015 research, which proved that limiting the amount of time we take in food leads to increased energy and concentration. This research also suggests that regular intermittent fasting may help prevent neurodegenerative diseases such as Alzheimer's. When the body stops taking in food, it begins to use its own energy stores. In a fasting state, processes such as autophagy - a natural mechanism in which cells "eat" damaged parts and replace them with new ones - are activated. This renewal process helps prevent the accumulation of harmful substances that can negatively affect brain cells and overall health. The fasting window can vary, but one of the most popular approaches is called 16/8, which means 16 hours without food and 8 hours during which food is eaten. This regimen is often popular among athletes and executives who need to maintain a high level of focus during the day. An example is the story of one start-up entrepreneur who found that after switching to this type of diet, she achieved a more stable performance and was able to manage stress better. Intermittent fasting is not just about calorie control, but more importantly about supporting healthy biochemical processes in the body that have a direct impact on our energy and mental capacity. By taking this approach, the body learns to better manage energy, which is especially important for the brain, which uses a lot of energy to function. Asprey's approach to intermittent fasting offers an effective and accessible way to improve mental performance and strengthen resilience to stress - a tool that is very valuable in today's hectic times.

Inflammation is the body's natural response to infection or injury, but chronic inflammation that arises from a poor lifestyle or inappropriate diet can lead to long-term cellular damage. Long-term inflammation not only interferes with physical health, but also affects the ability to concentrate and think clearly. Asprey points out that one of the main culprits of inflammation is modern dietary habits - eating processed foods, refined sugars and saturated fats. These foods can cause so-called oxidative stress, in which free radicals build up in the body, leading to cell damage and the development of inflammation. To reduce inflammation, he therefore recommends avoiding foods high in added sugars, trans fats and chemical additives. One effective way to reduce inflammation is to focus on anti-inflammatory foods. Vegetables such as broccoli, spinach and turmeric are rich in antioxidants that help neutralize free radicals and support the body's natural healing processes. High-quality oils, such as olive or fish oil, contain omega-3 fatty acids, which are known for their anti-inflammatory properties and contribute to overall brain health. Lifestyle is also important, as it affects inflammation levels. Stress is one of the main triggers of inflammation, so practices such as meditation, regular exercise and sufficient sleep have been shown to significantly help the body manage stress and therefore reduce inflammation. One well-known study from Harvard University in 2007 showed that meditation and mindful breathing can directly reduce markers of inflammation in the body while promoting focus and mental well-being. As part of daily life, it can be helpful to avoid environmental toxins such as pesticides, cigarette smoke, and air pollution that contribute to oxidative stress and promote inflammation. For example, growing your own herbs or choosing organic foods can be a step toward healthier living and reduced inflammation. This strategy for reducing inflammation has a positive impact on overall health, but especially on mental clarity and performance. The result is better concentration, a calmer mind, and long-term sustainable energy, all of which contribute to a healthier and more productive lifestyle.

The book also discusses the use of technology to support mental and physical health - this is called biohacking, which Asprey advocates as an effective way to improve one's abilities and achieve higher performance. Biohacking involves using a variety of tools and methods that stimulate the body and mind, allowing you to perform beyond your normal limits. One example of this technique is the use of red light to stimulate the mitochondria in our cells. Scientists have found in recent years that exposure to red light can increase energy production in cells, which in turn improves stamina and concentration. The use of red light is even being explored in the context of treating depression and improving sleep, as it helps regulate the body's biological rhythms. Another popular technique is "cold therapy" or cold therapy, which is very popular among biohackers. For example, Dutch extreme athlete Wim Hof, known by the nickname "Iceman," promotes cold exposure as a way to increase resistance to stress and boost immunity. The cold causes the body to go into a defensive mode, stimulating the mitochondria while increasing energy production, which Asprey recommends as a way to wake up the body and mind. To improve sleep quality, it is in turn helpful to limit exposure to blue light emitted by electronic devices. This is because blue light suppresses the production of melatonin, the sleep hormone, which can lead to problems falling asleep. Wearing blue light-blocking glasses or limiting screen time in the evening is an easy way to optimize sleep and increase daytime energy. These technological approaches can be summarised as part of a broader approach to health, where modern knowledge is used to enhance the body's natural abilities. Examples include tracking biological readings through apps and wearable technologies that allow monitoring of sleep, heart rate and stress levels. This approach gives us the opportunity to better understand our own bodies and adapt our daily activities to be as efficient as possible. Ultimately, these technologies represent an approach to optimising health and performance that has become accessible not only to professional athletes, but also to ordinary people who want to improve their mental and physical capabilities. This modern biohacking offers tools to become a better version of yourself and live life with more energy and determination.

Sleep is a fundamental pillar of both physical and mental health - during deep sleep, brain cells regenerate, memory strengthens and emotions stabilize. Lack of quality sleep can result not only in fatigue and irritability, but also in a reduced ability to concentrate, remember and react quickly. Asprey stresses that creating the right sleep environment is key to getting a full night's rest. Simple but effective steps include maintaining a lower room temperature, ideally between 15-19°C, which research suggests promotes deep sleep. Complete darkness is also important - light, even dim light, can disrupt melatonin production and therefore the quality of sleep. Eye masks or good quality curtains that block out light and allow the body to go into deep rest can help. An evening routine is also important for sleep. Asprey suggests avoiding blue light from cell phone and computer screens for at least an hour before bed, as it suppresses melatonin. Using filters on screens or reading a book in the evening in lower light can have a beneficial effect on the production of this hormone. Some studies also show that relaxation techniques, such as deep breathing or meditation, help the body relax and prepare for quality sleep. Another way to promote quality sleep is to reduce your intake of caffeine and other stimulants, especially in the evening. Caffeine can be present in the body for up to six hours and often interferes with the ability to fall asleep quickly. For example, a cup of coffee drunk at five in the evening can still prevent the body from entering a state of deep rest at ten. The importance of sleep for mental performance is nothing new, but its value is often underestimated. In 2013, a study conducted at Harvard University showed that people who slept less than six hours performed 20% lower on work tests than those who slept at least eight hours. This finding shows that quality sleep is essential for long-term success. Establishing a stable sleep schedule can contribute significantly to increased mental clarity, memory, and creativity. Quality sleep is therefore an investment in our performance and mental resilience - allowing us to get up each day with renewed energy and clarity, ready to tackle challenges and make better decisions.

Head strong provides a comprehensive look at the modern lifestyle and its impact on brain health, while offering practical solutions for maintaining long-term energy and focus. Asprey encourages us to rethink our daily habits and implement changes that will have a positive impact on both our mental performance and overall well-being. From eating habits and intermittent fasting to sleep hygiene and reducing inflammation to using technology for biohacking, Asprey shows us that we can manage brain performance in a similar way to how we optimise physical fitness. The book's overall approach is practical and motivating, focusing on small changes that can yield big results. Asprey offers not only methods to improve performance, but also a philosophy that encourages us to consider our health and life energy as values worth investing in. The book becomes an inspiration for all who want to get the most out of their brains and make the most of everyday moments. Do you have feedback for us? We'd love it if you let us know your opinion on our content! Just send an email to feedback@rewio.app with the title of this book in the subject line and share your impressions!