← All sources
Physical activity advice only or structured exercise training and association with HbA1c levels in type 2 diabetes: a systematic review and meta-analysis
Meta-analysis of 47 RCTs (n=8,538) in type 2 diabetes: structured exercise training pooled to −0.67% HbA1c versus control; aerobic, resistance, and combined training each showed reductions, with larger HbA1c drops when structured exercise exceeded 150 minutes per week.
Design
- Systematic review + meta-analysis; 47 RCTs, n = 8,538 adults with type 2 diabetes (≥12 weeks)
- Arms: structured exercise (aerobic / resistance / combined), physical activity advice ± diet, vs control
Glycemic outcomes (random-effects pooled mean differences vs control)
- Structured exercise training (23 trials): −0.67% HbA1c (95% CI −0.84 to −0.49; I² = 91.3%)
- Structured aerobic: −0.73% (95% CI −1.06 to −0.40)
- Structured resistance: −0.57% (95% CI −1.14 to −0.01)
- Combined aerobic + resistance: −0.51% (95% CI −0.79 to −0.23)
- Dose: >150 min/week structured exercise associated with ~0.89% HbA1c reduction vs ≤150 min/week ~0.36% in abstract narrative
- Physical activity advice alone: not associated with HbA1c change; advice + dietary advice −0.58% (95% CI −0.74 to −0.43)
Evidence hygiene
High between-trial heterogeneity—effect sizes are literature-level summaries, not guaranteed for every home program.
Publication
Umpierre D, Ribeiro PA, Kramer CK, et al. JAMA. 2011 May 4;305(17):1790-1799. PMID 21540423.
Outcomes
- HbA1c (Glycated Hemoglobin)-0.67% (Absolute Change)
- Structured exercise >150 min/week associated with larger pooled HbA1c reduction (~0.89%) than ≤150 min/week (~0.36%) per abstract dose narrative; physical activity advice alone did not change HbA1c vs control.