The Neuroprotective Effects of Exercise on Cognitive Decline: A Preventive Approach to Alzheimer Disease.
Level 5 - mechanism / opinion, no new human data
Narrative review of animal and human literature without systematic review methodology or new human data.
PubMed 32190507 · doi:10.7759/cureus.6958
What was done
This paper is a narrative review summarizing existing human and animal literature regarding the neuroprotective mechanisms of physical exercise against cognitive decline and Alzheimer's disease.
What was found
The abstract reports no numerical data, effect sizes, or statistical metrics. It describes qualitative findings across studies indicating that exercise may slow the onset and clinical progression of Alzheimer's disease, associated with reduced amyloid deposits and neurofibrillary tangles alongside increases in cerebral blood flow, neurogenesis, synaptogenesis, brain-derived neurotrophic factor, and insulin-like growth factor 1.
Why it matters
It outlines the biological and clinical rationale for evaluating exercise as a non-pharmacological preventive and adjunct strategy for dementia.
Limits
The abstract describes a broad narrative synthesis without systematic inclusion criteria, risk-of-bias assessments, study counts, or quantitative effect estimates. It conflates animal model mechanisms with clinical human outcomes.
Cited by
- supports Exercise enhances production of brain-derived neurotrophic factor (BDNF), leading to neurogenesis, synaptogenesis, reduced inflammation, and improved insulin function.