Report results: Impact of whole‐body resistance exercise timing on mitigating hyperglycaemia‐induced vascular dysfunction in healthy adults

Q: What are the key findings of this study?

Whole-body resistance exercise performed immediately after a high-carbohydrate meal improved flow-mediated dilation by 2.3% (p=0.04) and lowered postprandial glucose by 1.5 mmol/L (p<0.01) compared to a non-exercise control.

Q: What is the clinical evidence from this study?

Study design: RCT. Population: Healthy adults (postprandial hyperglycemia) (n=24). Intervention: Whole-body resistance exercise immediately post-meal vs. Non-exercise Control. Primary outcome: Endothelial function via flow-mediated dilation (FMD) of the brachial artery at 60 min post-meal (MD 2.3%, p=0.04).

Q: What does this research mean for the field?

Exercise performed immediately after a meal improves vascular function and lowers postprandial glucose levels in healthy adults. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.SUPPORTS_CONSENSUS.

Laura Smith; Lauren A. Roach; Courtney R. Chang; Tannia Cyriac; Kate Oetsch; Evelyn B. Parr; Monique E. François

doi:10.1113/ep093099

March 9, 2026Experimental PhysiologyOpen Access

Report results: Impact of whole‐body resistance exercise timing on mitigating hyperglycaemia‐induced vascular dysfunction in healthy adults

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Key result

Post-meal resistance exercise improves flow-mediated dilation by ~2.3 percentage points versus no exercise.

MD 2.3%
P=0.04
n=24

Figures

Why the study?

Postprandial hyperglycaemia impairs vascular endothelial function, but whether an optimal exercise timing exists to mitigate this dysfunction is unknown.

Does the timing of whole-body resistance exercise relative to a high-carbohydrate meal improve postprandial endothelial function and mitigate hyperglycemia in healthy adults?

Key Points

To determine whether the timing of whole-body resistance exercise relative to a high-carbohydrate meal optimizes postprandial glucose control and mitigates vascular endothelial dysfunction.
Randomized crossover study comparing four exercise timing protocols—30 min pre-meal (30Pre), immediately post-meal (IP), 30 min post-meal (30Post), and 60 min post-meal (60Post)—against a non-exercise control in healthy adults (N=24 completed; n=19 analyzed for vascular function).
Participants performed whole-body resistance training relative to eating a high-carbohydrate meal, with capillary glucose, flow-mediated dilation (FMD) of the brachial artery, arterial stiffness, and blood pressure evaluated up to 120 min post-meal.
Resistance exercise performed immediately post-meal increased flow-mediated dilation by 2.3 ± 2.7% (P = 0.04) and lowered postprandial glucose by 1.5 ± 1.8 mmol/L (P < 0.01) at 1 h post-meal compared to the control.
Post-meal exercise at 30 min and 60 min significantly decreased post-exercise glucose concentrations by 1.06 ± 2.26 mmol/L compared to control (P = 0.002).

Study Design

Type

RCT (n=24)

Blinding

Single-blind

Randomization

Randomized using the RAND function in Microsoft Excel

Multicenter

No

Structured PICO

Does the timing of whole-body resistance exercise relative to a high-carbohydrate meal improve postprandial endothelial function and mitigate hyperglycemia in healthy adults?

P

Population

24 healthy, recreationally active adults aged 25-40 underwent a randomized crossover trial to determine the optimal timing of a 30-minute whole-body resistance exercise session for mitigating postprandial endothelial dysfunction over a 2-hour follow-up.

I

Intervention

Whole-body resistance exercise (30 minutes duration, ~30% of 1RM, 3 sets of 25 repetitions of squats, lunges, leg extension, lat pull down, chest press, and shoulder press/bicep curl) performed at four different timings relative to a high-carbohydrate meal: 30 minutes before (30Pre), immediately following (IP), 30 minutes after (30Post), or 60 minutes after (60Post).

C

Comparator

Non-exercise Control consisting of a standardized high-carbohydrate meal (1.5 g carbohydrate per kg of lean body mass) with no exercise.

O

Outcome

Blood glucose levels and vascular endothelial function (measured via flow-mediated dilation of the brachial artery) assessed at fasting and incrementally up to 120 minutes following the meal.surrogate

Main Result

Mean Difference: 2.3

p-value: p=0.04

Performing whole-body resistance exercise immediately after eating is the most effective strategy to mitigate acute postprandial hyperglycemia and preserve vascular endothelial function in healthy adults.

Limitations

Missing data for FMD files reducing analyzed sample size to 19
Capillary glucose measured at 30-minute intervals may have missed exact peak glucose levels
Mild gastric discomfort reported by some participants with immediate post-meal exercise
Menstrual cycle phase was not controlled for
Only assessed acute outcomes, not long-term sustained clinical markers
Logistical constraints prevented the accurate capture of vascular data at 90 minutes with the exercise session in the 60Post condition.
Exclusion of five participants from the FMD results due to poor video quality, reducing the sample size for this outcome to n=19.

Implication

Immediate post-meal resistance exercise may preserve endothelial function after carbohydrate intake in healthy adults; extends exercise-timing data to resistance training.

Abstract

Postprandial hyperglycaemia is characterized by elevated blood glucose levels following a meal and is associated with impaired vascular endothelial function. Regular exercise has been shown to preserve and improve vascular endothelial function. However, whether there is an optimal time to exercise to mitigate postprandial hyperglycaemia-related vascular dysfunction is unknown. This randomized crossover study recruited healthy adults to compare four exercise timing conditions with a non-exercise Control. Participants performed whole-body resistance exercises at one of 30 min pre (30Pre), immediately post (IP), 30 min post (30Post), or 60 min post (60Post) consuming a high carbohydrate meal. Measures of blood glucose and endothelial function (via flow-mediated dilation of the brachial artery) were assessed at fasting and incrementally to 120 min following the meal. Exercise performed IP improved flow-mediated dilation by 2.3 ± 2.7% (P = 0.04) and lowered postprandial glucose by 1.5 ± 1.8 mmol/L (P < 0.01) at 1 h postprandially, compared to the Control. 30Post and 60post significantly decreased glucose post exercise by 1.06 ± 2.26 mmol/L (P = 0.002) compared to the control. Comparatively, pre-meal exercise did not improve postprandial vascular function or glucose compared to the control or other timing conditions. These findings add precision to the existing literature on postprandial exercise by identifying immediately after eating as most effective for improving vascular and metabolic outcomes relevant to cardiometabolic disease prevention.

Discussion

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Cite This Study

Smith et al. (2026) conducted an RCT in Healthy adults (postprandial hyperglycemia) (n=24). Whole-body resistance exercise immediately post-meal vs. Non-exercise Control was evaluated on Endothelial function via flow-mediated dilation (FMD) of the brachial artery at 60 min post-meal (MD 2.3%, p=0.04). Whole-body resistance exercise performed immediately after a high-carbohydrate meal improved flow-mediated dilation by 2.3% (p=0.04) and lowered postprandial glucose by 1.5 mmol/L (p<0.01) compared to a non-exercise control.

synapsesocial.com/papers/69b2584996eeacc4fcec7cde https://doi.org/10.1113/ep093099

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Report results: Impact of whole‐body resistance exercise timing on mitigating hyperglycaemia‐induced vascular dysfunction in healthy adults

Figures

Key Points

Study Design

Structured PICO

Main Result

Limitations

Implication

Abstract

Discussion

Cite This Study

Report results: Impact of whole‐body resistance exercise timing on mitigating hyperglycaemia‐induced vascular dysfunction in healthy adults

Figures

Key Points

Study Design

Structured PICO

Main Result

Limitations

Implication

Abstract

Discussion

Cite This Study

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