Aerobic exercise improves verbal working memory sub-processes in adolescents: behavioral evidence from an N-back task

Area of Science:

• Neuroscience
• Exercise Physiology
• Cognitive Psychology

Background:

• Limited research exists on how moderate aerobic exercise affects specific verbal working memory (VWM) sub-processes in adolescents.
• Existing studies primarily focus on the overall impact of exercise on working memory (WM).

Purpose of the Study:

• To investigate the influence of moderate intensity aerobic exercise on the maintenance and updating sub-processes of VWM in adolescents.
• To compare the effects of exercise habit, acute exercise, and long-term exercise interventions on VWM performance.

Main Methods:

• Experiment 1 used a 2x3 mixed design comparing VWM in adolescents with high versus low exercise habits across different memory loads (0-back, 1-back, 2-back).
• Experiment 2 employed a 2x3x3 mixed design to assess acute and long-term effects of moderate aerobic exercise on VWM in adolescents with low exercise habits.

Main Results:

• Adolescents with high exercise habits demonstrated superior VWM performance and sub-process efficiency compared to those with low exercise habits.
• Long-term exercise intervention yielded better VWM improvements than acute intervention, with both surpassing pretest levels.
• Aerobic exercise intervention exhibited a larger effect size on the updating sub-process of VWM.

Conclusions:

• Moderate intensity aerobic exercise enhances VWM performance and its sub-processes in adolescents.
• Long-term exercise interventions provide greater benefits for VWM compared to acute interventions.
• The updating sub-process of VWM shows particular sensitivity to aerobic exercise interventions.