Cited by 909Nerve injury and regenerationPhysical Activity and HealthExercise and Physiological Responses

A meta-analytic review of the effects of exercise on brain-derived neurotrophic factor

Open access
Szuhany, Kristin L., Bugatti, Matteo, Otto, Michael W.·2015·Journal of Psychiatric Research

Abstract

Consistent evidence indicates that exercise improves cognition and mood, with preliminary evidence suggesting that brain-derived neurotrophic factor (BDNF) may mediate these effects. The aim of the current meta-analysis was to provide an estimate of the strength of the association between exercise and increased BDNF levels in humans across multiple exercise paradigms. We conducted a meta-analysis of 29 studies (N = 1111 participants) examining the effect of exercise on BDNF levels in three exercise paradigms: (1) a single session of exercise, (2) a session of exercise following a program of regular exercise, and (3) resting BDNF levels following a program of regular exercise. Moderators of this effect were also examined. Results demonstrated a moderate effect size for increases in BDNF following a single session of exercise (Hedges' g = 0.46, p < 0.001). Further, regular exercise intensified the effect of a session of exercise on BDNF levels (Hedges' g = 0.59, p = 0.02). Finally, results indicated a small effect of regular exercise on resting BDNF levels (Hedges' g = 0.27, p = 0.005). When analyzing results across paradigms, sex significantly moderated the effect of exercise on BDNF levels, such that studies with more women showed less BDNF change resulting from exercise. Effect size analysis supports the role of exercise as a strategy for enhancing BDNF activity in humans, but indicates that the magnitude of these effects may be lower in females relative to males.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1016/j.jpsychires.2014.10.003

Cites

94 of 94 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • An acute bout of aerobic exercise transiently increases both serum and plasma BDNF in an intensity-dependent manner.

    “It has repeatedly been demonstrated that an acute bout of aerobic exercise transiently increases both serum and plasma BDNF in an intensity-dependent manner [10,11].”

    From Neurotrophic Factor BDNF, Physiological Functions and Therapeutic Potential in Depression, Neurodegeneration and Brain Cancer (2020) · cites this paper as [11]

    The Results section (“Effect of Acute Exercise on BDNF Levels”; page unavailable) reports a moderate increase in BDNF after a single exercise session. The moderators analysis includes serum and plasma measurements, but the paper does not establish that the increase depends on exercise intensity. Its measurements extend only to 60 minutes after exercise, so they do not establish when the increase subsides. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Physical exercise is one particularly effective strategy for increasing circulating levels of BDNF and improving brain function.

    “Physical exercise is one particularly effective strategy for increasing circulating levels of BDNF [10,11] and improving brain function [12,13,14].”
  • Regular exercise in moderate amounts increases the magnitude of BDNF expression following individual sessions of exercise.

    “Furthermore, regular exercise in moderate amounts has been shown to increase the magnitude of BDNF expression following individual sessions of exercise (Szuhany et al., 2015).”

    From Exercise-Mediated Neurogenesis in the Hippocampus via BDNF (2018) · cites this paper as Szuhany et al., 2015

  • Considerable evidence from the meta-analysis suggests that humans experience a dose-response relationship in which each session of exercise corresponds to a dose of increased BDNF expression.

    “Interestingly, considerable evidence from this meta-analysis suggests that humans also experience a dose-response relationship in which each session of exercise corresponds to a dose of increased BDNF expression.”

    From Exercise-Mediated Neurogenesis in the Hippocampus via BDNF (2018) · cites this paper as Szuhany et al., 2015

  • A meta-analysis of 29 studies spanning 1,111 human participants analyzed BDNF expression levels across various exercise paradigms.

    “Consistent with these findings is a meta-analysis of 29 studies spanning 1,111 human participants that analyzed BDNF expression levels across various exercise paradigms.”

    From Exercise-Mediated Neurogenesis in the Hippocampus via BDNF (2018) · cites this paper as Szuhany et al., 2015

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

2 of the 96 references couldn’t be matched to a known paper.

Cited by

Sorted by citations

Authors
Szuhany, K. L., Bugatti, M., & Otto, M. W.
Affiliations
Boston University (US)
Corresponding author
Szuhany, Kristin L.
Venue
Journal of Psychiatric Research
Publisher
Elsevier BV
Published
2015-01
Volume
60
Pages
56-64
ISSN
0022-3956 (ISSN-L)
OpenAlex
W2047262956
Cited by
909
References
96
Citations by year
2026: 113 · 2025: 104 · 2024: 83 · 2023: 90 · 2022: 77 · 2021: 99 · 2020: 75 · 2019: 76 · 2018: 64 · 2017: 63 · 2016: 49 · 2015: 15 · 2012: 1
FWCI
4.84
Type
journal article
Language
en
Open access
Locations
  • Journal of Psychiatric Research (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Mental Health (F31 MH100773)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Nerve injury and regeneration
  • Health Sciences › Medicine › Physiology › Physical Activity and Health
  • Health Sciences › Medicine › Rehabilitation › Exercise and Physiological Responses
Keywords
physical activity, brain-derived neurotrophic factor, single-session exercise, regular exercise, sex differences, cognitive function, mood, neuroplasticity
MeSH terms
Adult, Age Factors, Female, Humans, Male, Motor Activity, Sex Factors, Time Factors, Exercise, Brain-Derived Neurotrophic Factor

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review