Among people who work with their minds, there is a persistent observation: productivity does not decline due to the volume of tasks, but rather due to the quality of the state in which these tasks are solved. You can get enough sleep, eat properly, and work in a well-equipped office — and yet by the age of 35, you may find that your thoughts flow more slowly, concentration falters, and difficult tasks are postponed until tomorrow. Often, the reason is not overload, but that the body, on which this head rests, gradually stops coping with its role.
The connection between physical activity and mental work is not a myth from motivational books. It has specific biological foundations, repeatedly confirmed by research. And today, it is already clear that for people whose main work is intellectual (developers, analysts, entrepreneurs, accountants, authors), regular physical exercise is not an addition to work but a part of it. In this article, we will examine what really happens in this connection, what mechanisms are responsible for it, how it works in personal practice, and where the real limitations of this topic lie, which should be remembered.
In our practice at West Star Ltd, we have built the main processes around one person leading the development, so the question of "how to maintain intellectual form over the long distance" is not theoretical here. I will share what I have personally observed over the past few years.
WHAT HAPPENS IN THE BODY DURING TRAINING
When a person begins physical exercise, a cascade of processes is initiated in their body that is directly related to brain function. Several key ones.
First — the release of BDNF (brain-derived neurotrophic factor), a neurotrophic factor. This is a protein synthesized in both muscles and the brain, capable of crossing the blood-brain barrier and working directly with neurons. Its role is to support the life of existing neurons, promote the growth of new ones, and help form connections between them. According to a meta-analysis in Frontiers in Neurology from 2025, regular physical exercise reliably increases BDNF levels, especially in people under 40. The effect manifests on protocols lasting from 10-12 weeks, not from a single workout.
Second — lactate. The very one that was previously considered a "waste" of muscle work and the culprit of muscle burning. Modern studies (including work by McMaster University on the ExLBC protocol) show that lactate is a signaling molecule that is transported to the brain and there contributes to the production of the same BDNF. So, the burning in the muscles during moderate exercise is not "bad"; it is part of the process that later ensures clarity of thought.
Third — blood flow. During aerobic exercise, the brain receives more oxygen and glucose. After the workout, there is a state of enhanced cognitive function for 30-60 minutes — better concentration, higher information processing speed, easier focus on a single task. This is a well-known effect, confirmed by numerous studies across different age groups.
Fourth — a decrease in cortisol levels (the stress hormone) in the long term with regular training, as well as increased sensitivity to serotonin and dopamine. This changes the overall background in which intellectual work takes place: less anxiety, lower baseline tension, cleaner emotional state.
These four mechanisms work together, and they provide what is subjectively felt as "the brain works better." This is not self-suggestion or placebo — these are specific biochemical processes.
WHAT KIND OF EXERCISE WORKS AND WHAT DOESN'T
Not all physical activity provides a cognitive effect. There are several important nuances here that are often omitted in popular articles.
Firstly, intensity matters. According to research from recent years, the optimal range for cognitive benefits is moderate-intensity exercise, within 60-70% of the heart rate reserve. This means a workout where you can speak in short phrases but cannot sing. Too light exercise (a walk) gives a smaller effect, too heavy (working at the limit) distracts resources for recovery and reduces cognitive function in the short term.
Secondly, duration. The effect of a single workout lasts several hours. The effect that changes the overall cognitive form over the long term begins to manifest after 10-12 weeks of regular training 3-5 times a week. This is not "started going to the gym last week and became smarter" — this is work for six months to a year with consistent regularity.
Thirdly, the type of exercise. Open-skill exercises — those that require attention switching and reaction to changing conditions (badminton, tennis, team games) — provide a greater increase in BDNF than closed-skill exercises (e.g., treadmill running or weightlifting). Strength training also works, but its effect on BDNF is slightly less than that of aerobic or mixed protocols. Therefore, if the goal is specifically a cognitive benefit, it makes sense to combine strength work with aerobic.
Fourthly, recovery. Without it, all biochemistry works in reverse. Less than 7 hours of sleep, chronic sleep deprivation, training after a short night — this is a path not to improved cognitive function but to its degradation because the body perceives the load as stress without resources for recovery.
PERSONAL PRACTICE — WHAT I HAVE OBSERVED OVER THE YEARS
Let me clarify: I am not an athlete and do not write as a fitness expert. I have a history of protrusions in the thoracic spine (Schmorl's nodes at the Th9-Th11 level), scoliosis, and problems with my right shoulder. This means that many classic exercises are closed to me or require serious modification. I train on a 5-day split, start each session with a pre-workout rehabilitation program developed in one of the Astana clinics, and work with weights noticeably more modest than I could with a healthy back.
Despite these limitations, I have maintained regular training for four years and can share observations.
First observation — the connection between a morning workout and the quality of the workday is direct. On days when I start the day with a workout, I accomplish as much by noon as I usually do in a whole day. After noon, concentration remains, which is not present on "non-workout" days. It's not magic — it's just that same window of enhanced cognitive function after exercise, multiplied by a better emotional state.
Second observation — working on complex tasks is easier on training days. By "complex," I mean not voluminous but intellectually demanding — designing architecture, analyzing a complex tax situation, writing a long text. On non-training days, these tasks are postponed. On training days — they are completed.
Third observation — over the long term, workouts have proven to be a cheap and effective protection against burnout. Solo work on multiple projects simultaneously is a serious risk of burning out by 35-40 years. Regular physical exercise works as one of the main regulators. It's not a panacea for overload, but without it, overload occurs faster and is harder to bear.
Fourth observation — the most important for people with spine or joint problems. Training can either help or harm, depending on how carefully you approach it. I had periods when I was lazy to warm up and tried to work with heavy weights — it always ended with an exacerbation and a week without training. Now I don't start anything without a full pre-workout program, and it changes everything.
IMPORTANT WARNING — CAUTION AND WATER
The more I train, the more I understand a simple thing: for people with spine problems, the main thing is not the number of sets and not the weight of the equipment, but how carefully you approach it.
With protrusions, scoliosis, or back pain, you cannot start training without consulting a doctor and understanding which exercises suit you and which are categorically not. Many classic exercises — deadlifts with a barbell, squats with weight on the shoulders, hyperextensions without preparation — can seriously harm. What I perform under supervision and with the correct technique, for another person with similar problems, may end in an exacerbation.
Simple principles I have learned over the years.
Warm-up and pre-workout preparation are mandatory. Without them, cold muscles and compensatory incorrect movement patterns easily lead to injury. It's not 5 minutes on the treadmill; it's a full block of exercises for 10-20 minutes focusing on problem areas.
Weight and intensity increase gradually. Not "today I'll try more." A 2.5-5% increase per week is a normal pace. Large jumps are a path to injury.
Technique is more important than weight. It's better to do 8 reps with the correct technique than 12 with the wrong one. In fact, not "better" — otherwise, it's impossible. Incorrect technique with increased weight is mathematically a matter of time before injury.
Water. This is a banal thing that everyone talks about and yet easily ignored. Dehydration during training leads to reduced blood flow, impaired recovery, muscle spasms, increased risk of injury. A simple practice: drink water before training, during it (in small portions every 15-20 minutes), and after. Especially important when working out in a gym with air conditioning, which additionally dries the air. Electrolytes in water are not marketing; during long or intense workouts, they are really needed.
Sleep is also part of training. What is not restored in sleep is not restored at all. 6 hours of sleep is a signal to cancel the workout, not a reason to drink coffee and go anyway.
Attention to body signals. Back pain after training is not "normal growth pain," it's a signal that something went wrong. Especially for those who already have back problems. It's better to skip a workout and see a doctor than to continue and end up out of the gym for a month.
WHERE THIS TOPIC HAS REAL LIMITATIONS
To prevent the article from turning into another motivation "get up and go to the gym," it's necessary to honestly state where these arguments do not work.
Workouts do not compensate for other problems. If you sleep 5 hours, eat irregularly, are overloaded with tasks, and constantly stressed — workouts will not make you a productive person. They work when the basic hygiene of life is in order. On a foundation of chaos, any physical activity simply adds stress.
The effect on cognitive function varies among people. Some studies show that the BDNF Val66Met genetic polymorphism significantly affects individual response. That is, on the same program, one person will get a clear cognitive bonus, while another will get almost none. This is not a reason not to train (other benefits remain), but don't expect the same effect for everyone.
For people with serious health problems, workouts may be contraindicated. Cardiological issues, complications after surgeries, acute periods of inflammatory diseases — these are all situations where self-prescribing a training program is dangerous. Any training during such periods — only according to a doctor's protocol.
The effect on work is not immediate. Many start training with the expectation of "becoming more productive in two weeks." This doesn't work. The first month is often the opposite: fatigue from unfamiliar loads, muscle soreness, temporary decrease in productivity. The real cognitive bonus begins after 6-8 weeks of consistent work and gains strength over a six-month to a year horizon. It's an investment, not a quick trick.
Overtraining is a real thing. When the load exceeds the body's ability to recover, biochemistry works in reverse: cortisol rises, libido falls, sleep worsens, cognitive function decreases. This happens to people who "solve" the stress problem by increasing training volumes. Training is medicine in the right dosage. In the wrong one — poison.
WHAT TO DO — SIMPLE PRACTICAL CONCLUSION
If we summarize everything above into a practical guide for a person who works a lot with their mind and wants their mind to work well over the long haul, several simple rules emerge.
Start with a medical check-up, especially after 30 and especially if there are complaints about the back or joints. A basic consultation with a therapist, a specialist doctor (orthopedist for back problems, cardiologist for heart risks), and a competent trainer is an investment that will pay off dozens of times.
Regularity is more important than volume. Three to four workouts a week for an hour to an hour and a half over the long term give more than five hours in the gym on weekends. When regularity is a habit, not a feat.
Combination of strength and aerobic exercise. Pure strength training is beneficial, but if the goal is also a cognitive effect, it makes sense to add aerobic work or activities with attention switching.
Attention to recovery at the level of sleep-drinking regime-nutrition. Without this base, no program will work.
Patience. Benefits come over months, not days. The main mistake of most is to quit after two weeks because "nothing changes." It changes, just not where you're looking.
In my practice, training is not a separate part of life but a part of work discipline. I cannot afford poor intellectual form because it depends on what I do every day. Therefore, regular training for me is not about sports, not about aesthetics, not about athletic achievements. It's about having my mind work the way I need it to over a ten to twenty-year distance. And on this distance — it's probably one of the most profitable time investments I know.