The Effect of Structured Exercise on Short-Term Memory Subsystems: New Insight on Training Activities

It has been shown that exercise positively affects cognitive abilities, such as frontal functions and long-term memory processes. We tried to understand whether different exercises (i.e., an open-skill activity, a team game, vs. a closed-skill activity, a circuit) might specifically influence different short-term-memory (STM) subsystems of working memory. We examined the effect of a single bout of open- and closed-skill exercises on three STM tasks (i.e., verbal, visuo-spatial, and motor) in children attending the 3rd and 4th classes at primary school. One group was tested before and after (T0 and T1) an Italian class (control group), one group before and after 30-min exercise on a circuit, and one group before and after 30-min of a team game. The control group presented no improvement. The open-skill activity improved short-term memory performance in all the participants at T1 (p < 0.001 for children attending the 3rd class, and p = 0.007 for children attending the 4th class). In contrast, closed-skill activity improved short-term memory performance in older children (those attending the 4th class; p = 0.046) at T1. Importantly, this finding was found in a school setting and might have ecological validity. Therefore, the exercise protocol here used might help to structure specific training activities for both normal children and those with learning deficits to positively improve short-term memory abilities.