The Facilitating Effect Of Acute Aerobic Exercise On The Coding And Consolidation Of Different Types Of Memory

Background and purpose: Memory,as a high-level cognitive function in the brain,plays a very important role in people's learning and life.The study found that acute aerobic exercise can improve people's long-term memory,but it is unclear whether this effect occurs primarily through encoding or consolidation.Studies have found that acute aerobic exercise mainly improves long-term memory through the coding process that facilitates memory formation.In another part,it is considered that acute aerobic exercise mainly improves long-term memory by facilitating the consolidation process of memory formation.The memory materials selected in these studies can be divided into two types: declarative memory and procedural memory,and the memory effect after exercise was tested at the time points of 1 hour and 24 hours after memory.Due to the inconsistent memory types and exercise intensity used in these studies,no consistent results have been obtained.Acute moderate-intensity aerobic exercise is a fitness intensity that is more common and suitable for mass fitness.Therefore,in this study,the effects of moderate intensity acute aerobic exercise on the encoding and consolidation of declarative memory and procedural memory were investigated at the time points of 1 hour and 24 hours after memory,trying to understand the facilitating effect of acute aerobic exercise on long-term memory formation,so as to provide a theoretical basis for improving people's long-term memory ability and enhancing cognitive function.Methods: In the first experiment,the effects of acute aerobic exercise on the encoding and consolidation of declarative memory were investigated.Twenty-two male college students,with an average age of 21.55±3.03 years,were selected to complete three experimental conditions: exercise before declarative memory(Chinese neutral double-word)(under this condition,the exercise mainly affects the encoding process of memory),exercise after memory(under this condition,the exercise only affects the consolidation process of memory)and no exercise.Experimental procedures include:(aerobic exercise)-learning-first free recall-(aerobic exercise)-rest for 1 hour-second free recall-rest for 24hours-third free recall-recognition test.In experiment 2,the effect of acute aerobic exercise on the encoding and consolidation of procedural memory was also investigated.Twenty male college students,with an average age of 20.35 ± 2.82 years,were selected to complete three experimental conditions: exercise(30 minutes of moderate-intensity aerobic exercise)before procedural memory(sequential response time task),exercise after memory and non-exercise.Experimental procedures include:(aerobic exercise)-sequence learning-(aerobic exercise)-rest for 1 hour-first sequence test-rest for 24 hours-second sequence test.The exercise program is 30 minutes of medium-intensity power cycling.Results: In experiment 1,the number of correct recalls of free recall memory of pre-memory exercise conditions at 1 hour after memory was significantly higher than that of control conditions(p = 0.013)and post-memory exercise conditions(p = 0.014).The number of correct recalls of free recall memory of pre-memory exercise conditions at 24 hours after memory was significantly higher than that of control condition(p = 0.005);The number of correct recalls of free recall memory of post-memory exercise conditions at 1 hour and 24 hours after memory was not significantly different from the control conditions.The recognition rate of 24 hours after the pre-memory condition and the post-memory condition was significantly higher than the control condition(p = 0.002,p = 0.007),and the discriminative index d' in signal detection theory was higher than the control condition(p=0.002,p = 0.002),the difference in reaction bias ? was not significant.In experiment 2,there was no significant difference between the sequence response time and accuracy of the pre-memory exercise condition and the control condition at 1 hour and 24hours;the post-memory exercise conditions was not significantly different from the control conditions in the 1-hour sequence reaction,and was significantly lower than the control condition(p = 0.044)in the24-hour sequence reaction,and the difference between the correct rate and the control condition was not significant.Conclusion: Acute aerobic exercise has a positive effect on different types of long-term memory.For declarative memory,long-term memory are improved primarily by facilitating the coding process of memory,and the effect occurs after 1 hour and 24 hours;For procedural memory,long-term memory are improved primarily by facilitating the consolidation process of memory,and the effect occurs after 24 hours.