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Yıl:2019; Cilt: 6; Sayı: 1>> Özet
TAM METİN
The Journal of Neurobehavioral Sciences; 2019;6(1):12-20
Akut egzersiz yoğunluğunun epizodik bellek ve çalışma belleği işlevi üzerindeki deneysel etkileri
B Tilman, PD Loprinzi
The University of Mississippi, University, USA
Bu çalışmanın amacı akut egzersizin epizodik bellek ve işleyen bellek üzerindeki yoğunluk bağımlı etkisini incelemektir. Bu amaçla eşleştirilmiş, sırası dengelenmiş, rastgele kontrollü bir araştırma dizaynı oluşturulmuştur (N=20; Mage=20.8 yıl). Bu 3 adet sırası dengelenmiş değerlendirmeler, kontrol ziyareti, orta yoğunlukta egzersiz (40% of HRR) ve yüksek yoğunluklu egzersizdir (70% of HRR). Epizodik bellek bir kelime listesi üzerinden anlık ve beklenmiş değerlendirme ile test edilmiştir. İşleyen bellek ise BrownPeterson testi ile değerlendirilmiştir. Sonuçlarda anlık epizodik bellek geri çağırma süreçleri üç durum arasında benzerlik arz etmektedir (8.5-8.7 kelime). Ancak, 20 dakika sonraki uzamış dönemde yüksek yoğunluklu egzersiz durumunun diğer iki duruma kıyasla daha yüksek seviyede kelime geri çağırma ile sonlandığı tespit edilmiştir (5.7 vs. 4.9 kelime). İşleyen bellek testi ise, ana etki için durumlar arasında anlamlı ilişki bulunmuş (F=4.3, P=0.02, η2 p =0.18), beklemenin ana etkisi anlamlı (F=30.6, P<0.001, η2 p =0.61), ve durum X bekleme süreleri ilişkisinin yine anlamlı olduğu bulunmuştur (F=2.97, P=0.01, η2 p =0.14); buna göre yüksek yoğunluklu egzersiz işleyen bellek kapasitesini arttırmakta en uygun durum olarak saptanmıştır. Sonuç olarak, bu çalışma akut yüksek yoğunluklu egzersizin işleyen bellek ve epizodik bellek kapasitesini optimize etmekte başarılı olduğu gösterilmiştir.
The experimental effects of acute exercise intensity on episodic memory and working memory function
The purpose of this study was to evaluate the potential intensity-dependent effects of acute exercise on episodic memory and working memory capacity. A counterbalanced, randomized controlled, within-subject design was employed (N=20; Mage=20.8 yrs). The three counterbalanced visits included a control visit, moderate-intensity exercise (40% of HRR) and high-intensity exercise (70% of HRR). Episodic memory was assessed from a word-list task, including an immediate and delayed (20-min delay) assessment. Working memory capacity was assessed from the Brown-Peterson task. Immediate episodic memory recall was similar across the three conditions (8.5-8.7 words). However, for the 20-min delay period, the high-intensity exercise condition had a higher word recall score than the two other conditions (5.7 vs. 4.9). For the working memory task, there was a statistically significant main effect for condition (F=4.3, P=0.02, ?2 p =0.18), main effect for delay period (F=30.6, P<0.001, ?2 p =0.61), and condition x delay period interaction effect (F=2.97, P=0.01, ?2 p=0.14); the high-intensity exercise condition was optimal in enhancing working memory capacity. In conclusion, we provide evidence that acute high-intensity aerobic exercise is optimally associated with working memory capacity, with suggestive evidence that it is also more optimally associated with episodic memory function.

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