Vitamin D + exercise

Vitamin D + exercise has been studied in 5 papers since 2017: 2 trials in people, 3 reviews; 1 in the past year. The newest paper, Mar 24, 2026: “Effects of Exercise Combined With Vitamin D Interventions on Glucose-Lipid Metabolism and Obesity in Individuals With Type 2 Diabetes Mellitus: A Systematic Review and Meta-Analysis”.

Intervention

5 papers study it11 findingsUpdated

See all 5

“The training caused the significant decrease in concentration of pro-inflammatory proteins HMGB1 (30 ± 156%; 90% CI) and IL-6 (-10 ± 66%; 90% CI) in MVD group.”
Changes in pro-inflammatory markers and leucine concentrations in response to Nordic Walking training combined with vitamin D supplementation in elderly womenBiogerontology2017doi:10.1007/s10522-017-9694-8

1 of its findings points the other way.

  • 2 independent labs in 2 countries
  • 1 finding against
  • Funders: Gdansk University of Physical Education and Sport and 2 more
  • Human trial2

Studies in people

1 study gave vitamin D + exercise to people and measured what changed.

What did studies of Vitamin D + exercise find?

7

Studies of Vitamin D + exercise measured 7 outcomes; the most studied are HbA1c (1 study), leucine (1) and IL-6 (1).

HbA1c

upin humans1downin humans1

1 study
  1. Vitamin D + exercise improves HbA1c in humans.

    “Subgroup analysis comparing combined and single interventions indicated that the Ex-VD group had a greater effect on HbA1c, FBG, TC, and TG compared to single intervention alone.”

    Reviewin patients with T2DM

    Effects of Exercise Combined With Vitamin D Interventions on Glucose-Lipid Metabolism and Obesity in Individuals With Type 2 Diabetes Mellitus: A Systematic Review and Meta-Analysis

    Nutrition reviews

  2. Vitamin D + exercise decreases HbA1c in humans (P = .01).

    “compared to the control group, the Ex-VD group had significantly reduced BMI (P < .01), HbA1c (P = .01), FBG (P < .01)”

    Reviewin patients with T2DM

    Effects of Exercise Combined With Vitamin D Interventions on Glucose-Lipid Metabolism and Obesity in Individuals With Type 2 Diabetes Mellitus: A Systematic Review and Meta-Analysis

    Nutrition reviews

More on HbA1c

Leucine

upin humans1+20% lower in lvd group

1 study
  1. Vitamin D + exercise increases leucine in humans (20% lower in the LVD group).

    “Although the applied NW training program combined with vitamin D supplementation caused the leucine level to rise, a comparison of the recorded response between groups and the adjusted effect indicated that the effect of the intervention was 20% lower in the LVD group.”

    Human trial12 weeksfemalesn = 27

    Changes in pro-inflammatory markers and leucine concentrations in response to Nordic Walking training combined with vitamin D supplementation in elderly women

    Biogerontology

  2. Vitamin D + exercise increases leucine in humans (20% lower in LVD group).

    “Although the intervention caused the leucine level to rise, a comparison of the recorded response between groups and the adjusted effect indicated that the effect was 20% lower in the LVD group.”

    Human trialserum12 weeksfemalesn = 27

    Changes in pro-inflammatory markers and leucine concentrations in response to Nordic Walking training combined with vitamin D supplementation in elderly women

    Biogerontology

More on Leucine

IL-6

downin humans1

1 study
  1. Vitamin D + exercise decreases IL-6 in humans.

    “A similar tendency of change was noted in the pleiotropic cytokine IL-6 concentration.”

    Human trial12 weeks

    Changes in pro-inflammatory markers and leucine concentrations in response to Nordic Walking training combined with vitamin D supplementation in elderly women

    Biogerontology

  2. Vitamin D + exercise decreases IL-6 in humans (-10 ± 66% (90% CI)).

    “The training caused the significant decrease in concentration of pro-inflammatory proteins HMGB1 (30 ± 156%; 90% CI) and IL-6 (-10 ± 66%; 90% CI) in MVD group.”

    Human trialin MVD group (baseline vitamin D > 20 ng/mL)Nordic Walking 1 h combined with vitamin D supplementationserum12 weeksfemalesn = 27

    Changes in pro-inflammatory markers and leucine concentrations in response to Nordic Walking training combined with vitamin D supplementation in elderly women

    Biogerontology

More on IL-6

HMGB1

downin humans1

1 study
  1. Vitamin D + exercise decreases HMGB1 in humans.

    “At the same time, a significant drop in the pro-inflammatory protein HMGB1 was recorded in the MVD participants.”

    Human trial12 weeks

    Changes in pro-inflammatory markers and leucine concentrations in response to Nordic Walking training combined with vitamin D supplementation in elderly women

    Biogerontology

  2. Vitamin D + exercise decreases HMGB1 in humans (-30 ± 156% (90% CI)).

    “The training caused the significant decrease in concentration of pro-inflammatory proteins HMGB1 (30 ± 156%; 90% CI) and IL-6 (-10 ± 66%; 90% CI) in MVD group.”

    Human trialin MVD group (baseline vitamin D > 20 ng/mL)Nordic Walking 1 h combined with vitamin D supplementationserum12 weeksfemalesn = 27

    Changes in pro-inflammatory markers and leucine concentrations in response to Nordic Walking training combined with vitamin D supplementation in elderly women

    Biogerontology

More on HMGB1

Total cholesterol

downin humans1

1 study
  1. Vitamin D + exercise decreases total cholesterol in humans (P < .01).

    “compared to the control group, the Ex-VD group had significantly reduced BMI (P < .01), HbA1c (P = .01), FBG (P < .01), TC (P < .01)”

    Reviewin patients with T2DM

    Effects of Exercise Combined With Vitamin D Interventions on Glucose-Lipid Metabolism and Obesity in Individuals With Type 2 Diabetes Mellitus: A Systematic Review and Meta-Analysis

    Nutrition reviews

More on Total cholesterol

BMI

downin humans1

1 study
  1. Vitamin D + exercise decreases BMI in humans (P < .01).

    “compared to the control group, the Ex-VD group had significantly reduced BMI (P < .01)”

    Reviewin patients with T2DM

    Effects of Exercise Combined With Vitamin D Interventions on Glucose-Lipid Metabolism and Obesity in Individuals With Type 2 Diabetes Mellitus: A Systematic Review and Meta-Analysis

    Nutrition reviews

More on BMI

Cognitive function

upin reviews1

1 study
  1. Vitamin D + exercise improves cognitive function.

    “Some animal studies demonstrated enhanced neuroprotection and cognitive improvement with combined interventions.”

    Reviewcombined interventions in animal studies

    Neuroprotective synergy of vitamin D and exercise: a narrative review of preclinical and clinical evidence on aging-related neuroplasticity and cognitive health

    Frontiers in nutrition

Latest

Nov 2025: 0Dec 2025: 0Jan 2026: 0Feb 2026: 0Mar 2026: 1Apr 2026: 0May 2026: 0Jun 2026: 0Jul 2026: 0Aug 2026: 0Sep 2026: 0Oct 2026: 01 paper in 12 months