How Sleep Affects Muscle Growth, Testosterone and Athletic Performance
Best form for sleep. Magnesium activates the parasympathetic nervous system (relaxation response), binds to GABA receptors in the brain, and reduces cortisol. Glycine additionally improves sleep quality.
Studies (Journal of Research in Medical) showed that 500 mg magnesium over 8 weeks significantly improved sleep duration and efficiency, reduced the number of awakenings and morning cortisol.
Caffeine half-life — 4-6 hours. This means that 200 mg of caffeine at 16:00 = 100 mg is still in the body at 22:00. Even if you fall asleep, sleep depth and quality suffer.
| Sleep Deprivation | Effect |
|---|---|
| 1 night < 5 val. | Testosterone -. Mood, focus worsen. |
| 1 week < 6 val. | Strength -5-10%. Reaction time slows. Cortisol elevated. |
| Long-Term Deficiency | Injury risk +. Muscle growth stops. Immunity drops. |
The information provided on this page is for educational purposes and should not replace professional medical consultation. Before starting to take any supplements or changing your nutrition/training regimen, it is recommended to consult a doctor or a certified nutrition specialist.
No. All information is educational in nature. For health questions, consult a doctor.
We recommend starting with the basics: protein, creatine, vitamins. Later, you can add specialized supplements as needed.
Most sports supplements are safe when used according to recommended doses. However, some may have side effects — always read labels and start with lower doses.
You can find more useful articles, tools, and guides in our on the tools page. We also recommend following the latest scientific research in sports nutrition.
When starting to exercise, nutrition is no less important than the training itself. Here are the key principles everyone should know:
For those who exercise, it is recommended to consume 1.6-2.2 g of protein per kilogram of body weight per day. Protein is involved in muscle recovery after training and in the production of enzymes and hormones. Best sources: chicken, fish, eggs, cottage cheese, whey protein.
Carbohydrates are the main fuel for training. Complex carbohydrates (oats, rice, potatoes, whole-grain products) provide sustained energy. Simple carbohydrates (fruit, honey) are suitable before/after training for quick energy replenishment.
Healthy fats (avocados, nuts, olive oil, fatty fish) are essential for the production of hormones, including testosterone. Avoid trans fats and too many saturated fats.
Even 2-3% dehydration can reduce strength and endurance. Drink at least 2-3 liters of water per day, and more when exercising.
Weigh yourself once a week, in the morning, on an empty stomach. Daily fluctuations of 1-2 kg are normal (water, food).
Measure your chest, waist, hips, arms, and legs every 2-4 weeks. This better reflects changes in body composition than weight alone.
Take photos of yourself every 4 weeks, with the same lighting and from the same angle. Visual changes are often noticeable even when the scale doesn’t move.
Record every workout — exercises, weights, sets, reps. Progress motivates!
The 2024 meta-analysis (Journal of the International Society of Sports Nutrition) confirmed that total daily protein intake is more important than timing of consumption. However, even protein distribution throughout the day (20-40g every 3-4 hours) is still optimal for muscle protein synthesis.
New evidence indicates that creatine not only improves physical performance but may also positively affect brain function, especially under sleep deprivation or high mental load.
2025 There is evidence that consuming ~20-30% more plant proteins results in muscle protein synthesis similar to consuming animal proteins. Most importantly — the total amount of leucine (an amino acid), which stimulates muscle growth.
Studies (Sleep) confirm that sleeping less than 5 hours per night can decrease testosterone levels after just one night. Chronic sleep deprivation has a cumulative negative effect.
2024 clinical: There is evidence that 2.6 g of omega-3 per day over 16 weeks significantly reduced joint pain and stiffness in people with an active lifestyle.
The information provided on this page is for informational and educational purposes only. It is not intended to diagnose, treat, or prevent any diseases. Before starting any dietary supplements or changing your training/nutrition program, we strongly recommend consulting a healthcare professional. Individual results may vary. supp.lt assumes no responsibility for any adverse effects arising from the use of the information provided here.
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The plant protein market is growing ~8% per year. More and more athletes are choosing vegan/vegetarian products not only for ethical reasons but also for health — plant proteins are often easier to digest and have less saturated fat.
Genetic testing and microbiome analysis allow the creation of individual nutrition plans. In the future, athletes will be able to receive supplement recommendations based on their DNA profile.
Smartwatches, sleep rings, glucose monitors — technologies allow accurate real-time monitoring of the effects of nutrition, sleep, and training on the body.
There is growing evidence of a link between the gut microbiome and athletic performance. Probiotics and prebiotics are becoming a standard part of athletes' supplement routines.
Athletes are increasingly choosing more sustainable products: recyclable packaging, locally sourced ingredients, plant proteins. The food supplement industry is responding to this trend with eco-friendly solutions.
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