Egzersiz ve BDNF İlişkisi
Özet
Bu çalışma, fiziksel egzersiz ile Beyin Kaynaklı Nörotrofik Faktör (BDNF) arasındaki ilişkiyi ve bu ilişkinin beyin sağlığı, nöroplastisite ile bilişsel işlevler üzerindeki etkilerini ayrıntılı bir şekilde incelemektedir. BDNF; merkezi ve çevresel sinir sisteminde nöronların gelişimi, hayatta kalması, aksonsal büyüme, sinaptik plastisite ve bellek süreçlerinde hayati rol oynayan 13,5 kDa ağırlığında dimerik bir nörotrofindir. Fiziksel egzersiz, beyinde ve periferik dolaşımda BDNF sentezi ile salınımını artırarak gelişmiş hafıza, öğrenme yeteneği, yürütücü işlevler ve ruh hali üzerinde olumlu etkiler yaratır. Bunun yanı sıra egzersize bağlı BDNF artışı; Alzheimer, Parkinson ve majör depresyon gibi nörodejeneratif bozukluklara ve yaşa bağlı zihinsel gerilemeye karşı koruyucu bir mekanizma sunar. Hem akut hem de kronik egzersiz uygulamaları dolaşımdaki BDNF seviyelerini yükseltmekle birlikte, bu yanıtın büyüklüğü egzersizin türüne, yoğunluğuna, süresine, frekansına, bireyin yaşına, cinsiyetine ve genel sağlık durumuna bağlı olarak farklılık gösterir. Özellikle yüksek yoğunluklu aralıklı egzersizler ile direnç antrenmanlarının BDNF salınımını belirgin şekilde uyardığı ve nöral adaptasyonu desteklediği tespit edilmiştir. Bilişsel faydalarının yanı sıra BDNF; glikoz alımı, yağ oksidasyonu ve kilo kontrolü gibi metabolik süreçlerin düzenlenmesinde de aktif rol almaktadır. Sonuç olarak, egzersizle indüklenen BDNF artışı beyin sağlığı ve sportif performans açısından kritik öneme sahip olup etki mekanizmalarının, irisin, inflamasyon ve oksidatif stres gibi farklı biyobelirteçlerle ilişkilerinin tam olarak anlaşılması için yeni araştırmalara gereksinim duyulmaktadır.
This study provides a detailed examination of the relationship between physical exercise and Brain-Derived Neurotrophic Factor (BDNF), as well as its effects on brain health, neuroplasticity, and cognitive functions. BDNF is a 13.5 kDa dimeric neurotrophin that plays a vital role in neuronal development, survival, axonal growth, synaptic plasticity, and memory processes in both the central and peripheral nervous systems. By increasing BDNF synthesis and release in the brain and peripheral circulation, physical exercise exerts positive effects on enhanced memory, learning ability, executive functions, and mood. Furthermore, exercise-induced BDNF elevation offers a protective mechanism against neurodegenerative disorders such as Alzheimer's, Parkinson's, and major depression, as well as age-related cognitive decline. Although both acute and chronic exercise interventions elevate circulating BDNF levels, the magnitude of this response varies depending on exercise type, intensity, duration, frequency, age, gender, and general health status. High-intensity interval training and resistance exercise, in particular, have been shown to significantly stimulate BDNF secretion and support neural adaptation. In addition to its cognitive benefits, BDNF actively participates in regulating metabolic processes such as glucose uptake, fat oxidation, and weight control. Consequently, exercise-induced BDNF elevation is of critical importance for brain health and sports performance, necessitating further research to fully elucidate its mechanisms of action and its relationships with various biomarkers such as irisin, inflammation, and oxidative stress.
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