Meta-analysis: Resistance Training Improves Cognition in Mild Cognitive Impairment

Area of Science:

• Neuroscience
• Gerontology
• Exercise Science

Background:

• Mild cognitive impairment (MCI) is a significant risk factor for dementia.
• Cognitive decline associated with MCI impacts daily functioning.
• Effective interventions to slow or reverse MCI are urgently needed.

Purpose of the Study:

• To systematically review and meta-analyze the effects of resistance training on cognitive function in patients with mild cognitive impairment.
• To assess the impact of resistance training on general cognitive function, executive function, and working memory in MCI patients.

Main Methods:

• A systematic search of PubMed, Embase, and Cochrane Library databases was conducted.
• Seven randomized controlled trials were included in the meta-analysis.
• Risk of bias was assessed using the Cochrane Collaboration's tool; statistical analysis employed standardized mean differences with 95% confidence intervals.

Main Results:

• Resistance training demonstrated a significant improvement in general cognitive function (SMD: 0.53, P=0.04).
• Subgroup analyses indicated that training twice weekly and sessions lasting over 60 minutes yielded better cognitive outcomes.
• Moderate improvements were observed in executive function (SMD: 0.50, P=0.0003), while working memory showed non-significant effects (P=0.14).

Conclusions:

• Resistance training shows promise as an intervention to mitigate mild cognitive impairment by enhancing cognitive functions.
• Specific training frequencies (twice weekly) and durations (>=60 min/session) may be more beneficial.
• Larger-scale studies are recommended to further elucidate the relationship between resistance training and cognition in MCI.