Last updated August 21, 2026
Key finding
Maximal oxygen consumption (VO2max) increased by 12% in vegetarian group (V) (F = 13.1, p < 0.001, partial η² = 0.171).
This study evaluated the effects of a vegetarian diet on physical fitness in patients with Type 2 diabetes, finding significant improvements in the vegetarian group.
Quick read
The essential study design details in one scan.
EvidenceScore™
Moderate
Study type
RCTs
Follow-up
Short-Term (≤3 mo)
Risk of bias
Some Concerns
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Plain-language summary
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Study focus
This study evaluated the effects of a vegetarian diet on physical fitness in patients with Type 2 diabetes, finding significant improvements in the vegetarian group.
These findings suggest that dietary choices can significantly impact physical fitness in patients with Type 2 diabetes. By adopting a vegetarian diet, patients may improve their aerobic capacity and overall health, which is crucial for managing diabetes and preventing complications.
Limited generalizability due to specific population characteristics. Sample size not specified, which may affect the robustness of results. Potential confounding factors not measured or controlled.
Published in
Publication details and source links for this paper.
Jiri V, Martin M, Martin H, Terezie P, Hana K. Effects of a Vegetarian Diet on Physical Fitness in Patients with Type 2 Diabetes: A Randomized Controlled Trial. Nutrients. 2016;8(11):671. doi:10.3390/nu8110671
Maximal oxygen consumption (VO2max) increased by 12% in the vegetarian group (p < 0.001).
Maximal performance (Watt max) increased by 21% in the vegetarian group (p < 0.001).
No significant changes in VO2max or Watt max were observed in the conventional diet group.
Evidence network
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This study contributes evidence to Aerobic exercise and Change in Resting Energy Expenditure (REE), Change in fasting oxidation of carbohydrates, Increase in maximal performance (Watt max), and 1 more.
This study contributes evidence to
Primary intervention
Aerobic exercise
Primary outcomes
Evidence topics
Primary intervention
Intervention and outcome relationships this study adds to the evidence network.
Editorial context
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Evidence network role
This section describes how the study fits into the current evidence network. It does not determine whether an intervention works on its own.
1
Related topics
4
Evidence pairs
38
Related studies
Evidence topic
Contributes evidence
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Primary evidence
Evidence topic
matched_intervention
Core evidence
The primary outcomes reported in this study.
Aerobic exercise → Change in fasting oxidation of carbohydrates
Aerobic exercise → Change in fasting oxidation of carbohydrates
Aerobic exercise → Change in Resting Energy Expenditure (REE)
Aerobic exercise → Change in Resting Energy Expenditure (REE)
Aerobic exercise → Increase in maximal performance (Watt max)
Aerobic exercise → Increase in maximal performance (Watt max)
Aerobic exercise → PBMC maximal oxygen consumption rate
Aerobic exercise → PBMC maximal oxygen consumption rate
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Relationships organized using the Dediabetes Evidence Intelligence™ framework.
This study contributes to evidence on Aerobic Exercise and Change in fasting oxidation of carbohydrates, Aerobic Exercise and Increase in maximal performance (Watt max).
This study contributes to the evidence on the following intervention-outcome relationships.
Physical Activity
Physical Activity
Curated evidence collections and hubs this study is part of.
All studies on Aerobic Exercise
Contributes to Aerobic Exercise evidence base.
All studies measuring Change in fasting oxidation of carbohydrates
Measures Change in fasting oxidation of carbohydrates as a key outcome.
All studies measuring Increase in maximal performance (Watt max)
Measures Increase in maximal performance (Watt max) as a key outcome.
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1 results
1 results
1 results
1 results
1 results
Generated from the study's connected evidence using Evidence Intelligence™.
Aerobic exercise appears to improve increase in maximal performance (watt max).
ConsistencyScore™: Consistency cannot yet be determined from the available evidence.
Ranked evidence signals
Increase in maximal performance (Watt max)
EvidenceScore™ Emerging | EvidenceScore™ 59.0 | strong positive | ConsistencyScore™ Unclear | 1 study
Why this answer: This answer is based on a single supporting study.
Limitations
Aerobic exercise appears to improve pbmc maximal oxygen consumption rate.
ConsistencyScore™: Consistency cannot yet be determined from the available evidence.
Ranked evidence signals
PBMC maximal oxygen consumption rate
EvidenceScore™ Emerging | EvidenceScore™ 59.0 | strong positive | ConsistencyScore™ Unclear | 1 study
Why this answer: This answer is based on a single supporting study.
Limitations
Current evidence does not show a clear benefit of Aerobic exercise for change in resting energy expenditure (REE).
ConsistencyScore™: Consistency cannot yet be determined from the available evidence.
Ranked evidence signals
Change in Resting Energy Expenditure (REE)
EvidenceScore™ Emerging | EvidenceScore™ 59.0 | neutral | ConsistencyScore™ Unclear | 1 study
Why this answer: This answer is based on a single supporting study.
Limitations
Current evidence does not show a clear benefit of Aerobic exercise for change in fasting oxidation of carbohydrates.
ConsistencyScore™: Consistency cannot yet be determined from the available evidence.
Ranked evidence signals
Change in fasting oxidation of carbohydrates
EvidenceScore™ Emerging | EvidenceScore™ 59.0 | neutral | ConsistencyScore™ Unclear | 1 study
Why this answer: This answer is based on a single supporting study.
Limitations
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