A study from McGill University suggests that a 20-minute workout or 90-minute nap can help protect memory formation in healthy young adults after 30 hours of sleep deprivation.

Researchers at McGill University found that healthy adults who exercised or napped after 30 hours of wakefulness performed better on memory tests than those who remained awake. The study involved 54 participants between the ages of 18 and 35 who were tested on their ability to identify previously viewed images. Both interventions resulted in improved memory performance compared to a control group that received no intervention.

Study Methodology and Findings

Participants were divided into three groups: exercise, nap, and a control group. After 30 hours without sleep, the exercise group performed a bout of moderate-to-vigorous activity, while the nap group slept for 90 minutes. Three days later, participants completed a memory test involving 150 previously viewed images mixed with 75 new ones. The exercise group showed a 21% improvement in identifying old images compared to the control group, while the nap group showed a 23% improvement.

Mechanisms and Limitations

According to study co-author Marc Roig, exercise and napping appear to improve memory through different biological processes. Napping may restore a brain state favorable to learning, while exercise helps the brain encode information more efficiently. However, researchers noted that these interventions are not replacements for healthy sleep and that the study's findings were limited to healthy young adults without sleep disorders or night-shift schedules.