A single session of exercise as a modulator of short-term learning in healthy individuals

作者：Sage Michael D^*; Beyer Kit B; Laylor Mark; Liang Carmen; Roy Eric A; McIlroy William E

来源：Neuroscience Letters, 2016, 629: 92-98.

DOI：10.1016/j.neulet.2016.06.064

• Memory
• Arousal
• Response time
• Exercise
• Learning

Background: A single session of aerobic exercise is linked to faster motor responses; however, the effect on rate of short-term learning is less clear. The objective was to evaluate the influence of a single bout of aerobic exercise on the rate of short-term acquisition of a shape-letter association task requiring a motor response.
Methods: 23 [11 females, age 20.8 +/- 2.7 years] healthy young adults were evaluated using a randomly assigned crossover design which was counterbalanced for order before and after moderate (exercise) and light (control) intensity cycle ergometry. Participants performed 3 blocks, with each block consisting of one round of training and testing. During training, participants were tasked with learning 6 unique shape-letter associations. Subsequent testing required a key press response to a visually presented shape pattern. Response time and error rates were used to assess acquisition over the 3 blocks of testing.
Results: Mean response time was faster post-exercise relative to the other testing periods, and approached statistical significance compared to post-control (p < 0.07). However, no significant difference in response time reduction (difference between test block 1 and test block 3) was identified between the four evaluations (pre and post the exercise and control conditions). Error rate reduction (test block 1 minus test block 3) revealed that individuals had the smallest change in error rate post-exercise (p <0.05). Follow-up analyses revealed fewer errors in test block 1 and test block 2 post-exercise which approached statistical significance (p = 0.06) suggesting near-perfect error rates were obtained after only 2 testing blocks post-exercise compared to 3 blocks in the other testing periods.
Conclusions: Support for augmentation of short-term learning was mixed as errors were reduced postexercise while response time was not different between evaluations. Future work should include neurophysiological evaluation and a retention test to better elucidate the influence of aerobic exercise on rate of short-term learning.

• 出版日期2016-8-26