3 New Papers: Sweeteners Edge Out Sugar for Weight Maintenance, Exercise Resolves Inflammation, and Resistance Training Halves Sleep Apnea Severity
Three PubMed papers indexed June 1–7, 2026: an 83-person 12-month RCT finds sweeteners may slow weight regain after dieting (3.0 vs. 5.9 kg, p=0.050), but multiple authors have industry funding ties; a 4-arm 12-week RCT (n=44 obese men) shows interval resistance-aerobic training raises the inflammation-resolving mediator Maresin-1 and cuts HOMA-IR, with fisetin adding to the anti-inflammatory effect; and an 8-week RCT (n=25) finds resistance training alone reduces apnea-hypopnea index by ~21 events/hour in moderate-to-severe OSA, confirmed by polysomnography.
Research Brief
Three PubMed papers indexed June 1–7, 2026 — one each from nutrition, exercise science, and sleep research.
Nutrition: Sweeteners may help you keep weight off after dieting — but the trial has notable industry ties
After losing weight, most people regain it. The question is whether what you drink during maintenance affects that trajectory. A new substudy from the European SWEET project, published in International Journal of Obesity on June 2, 2026, offers early data — with caveats.1
What they did: 83 adults with overweight or obesity completed a 2-month caloric-restriction weight-loss phase, then a 10-month weight-maintenance phase.
Loading content card…
During maintenance, half followed a low-added-sugar healthy diet that included sweeteners and sweetness enhancers (S&SEs — e.g. aspartame, stevia-based compounds); the other half ate the same diet with sugar instead of S&SEs. The researchers measured body composition, insulin sensitivity via oral glucose tolerance test, abdominal subcutaneous adipocyte size, and adipose tissue gene expression at three time points: baseline, post-weight-loss, and end of maintenance.
What they found: The weight-loss phase itself produced clear, consistent results regardless of group: adipocyte size shrank, insulin sensitivity improved, and genes involved in fat storage, lipolysis, and leptin signaling were significantly downregulated. During the 10-month maintenance phase, the S&SEs group tended to regain less weight (3.0 ± 1.2 kg vs. 5.9 ± 1.0 kg in the sugar group; p = 0.050). They also showed a blunted rebound in the fat-storage gene LPL and a decrease in ABHD5 expression compared to sugar users. No between-group differences were found in adipocyte size, insulin sensitivity, or adipogenesis/inflammation gene markers.
What it means: Replacing sugar with S&SEs during weight maintenance may modestly slow fat-mass regain and alter lipolytic gene activity in adipose tissue — though the between-group weight difference only reached borderline significance (p = 0.050). The underlying mechanism is unclear; the authors don't claim the gene-expression changes directly caused the weight difference.
Actionable takeaway: If you've just completed a diet and are trying to hold the result, swapping sugar-sweetened drinks for S&SE alternatives may offer a marginal edge during the maintenance phase. Don't interpret the gene-expression data as proof of a metabolic shift — the functional significance of the LPL/ABHD5 changes is uncertain.
Study design: RCT (parallel-group), n = 83, 12 months total. Peer-reviewed, published in International Journal of Obesity (Nature). DOI: 10.1038/s41366-026-02117-z. PMID: 42230988.
Conflicts of interest: Two authors (JAH and JCGH) received research funding from the American Beverage Association. JCGH also received honoraria from Novo Nordisk and Boehringer Ingelheim. ARA received honoraria from Nestlé, Unilever, and the International Sweeteners Association. These ties don't invalidate the data, but they warrant caution when interpreting conclusions about S&SE benefits.
Exercise: Resistance training plus a plant-derived supplement ramps up the body's own inflammation-off switch
Obesity generates a state of chronic low-grade inflammation partly because the system that normally resolves inflammation — specialized pro-resolving mediators — doesn't work efficiently. A 12-week 4-arm RCT published in the Journal of the International Society of Sports Nutrition (epub May 31, 2026) tested whether adding the flavonoid fisetin to interval resistance-aerobic training could boost Maresin-1, one of those resolving mediators, beyond what exercise alone achieves.2
What they did: 44 obese adult males (BMI > 30) were randomized to one of four groups for 12 weeks: (1) control + placebo, (2) fisetin only (200 mg/day), (3) training + placebo, or (4) training + fisetin. The training protocol combined 8 resistance exercises at 60% of one-repetition maximum with progressive aerobic bouts at 50–70% of maximum heart rate, three sessions per week. Plasma Maresin-1, IL-6, TNF-α, fasting blood glucose, insulin, and HOMA-IR were measured pre- and post-intervention.
What they found: Exercise alone (training + placebo group) significantly raised Maresin-1 (p = 0.001), reduced IL-6 (p = 0.006), and cut fasting blood glucose, insulin, and HOMA-IR (all p ≤ 0.003). Fisetin alone reduced TNF-α and IL-6 but did not raise Maresin-1. The training + fisetin group produced the largest reductions in metabolic markers across all outcomes, with statistically significant group × time interactions for every measured variable.
What it means: Exercise is the primary driver here: it activates the body's own inflammation-resolution pathway (Maresin-1) and improves insulin sensitivity, neither of which fisetin achieves alone. Fisetin may offer a modest additive metabolic effect when stacked with training, but the data don't show it's meaningfully better than exercise alone on the most clinically relevant endpoints (HOMA-IR, glucose).
Actionable takeaway: The exercise protocol itself is the intervention worth adopting — a combination of resistance training and moderate-to-high-intensity cardio three times per week significantly reduced insulin resistance in men with obesity within 12 weeks. Fisetin is a secondary, unproven addition at this stage.
Study design: 4-arm parallel RCT, n = 44 (obese males only), 12 weeks. Published in JISSN, Vol 23, 2026. DOI: 10.1080/15502783.2026.2679718. PMID: 42218768.
Conflicts of interest: None reported.
Sleep: Eight weeks of resistance training cut moderate-to-severe sleep apnea severity by 41%
The standard treatment for obstructive sleep apnea (OSA) is a CPAP machine. Exercise has been explored as an adjunct, but almost all research has focused on aerobic exercise. A new RCT published in Sleep Medicine (Volume 142, June 2026) asked what happens when people with moderate-to-severe OSA do resistance training instead — with results that are difficult to ignore.3
What they did: 25 adults with moderate-to-severe OSA (52% male; mean age 55.4 years; mean BMI 36.3; mean apnea-hypopnea index [AHI] of 50.5 ± 25.5 events/hour at baseline) were randomized to either a resistance training group (3 sessions/week for 8 weeks) or a control group (stretching exercises).
Loading content card…
Outcomes included full-night polysomnography, respiratory muscle strength, rostral fluid shift, and body composition.
What they found: Significant group × time interactions for AHI (RT: −21.0 ± 6.1 events/hour vs. control: +3.5 ± 3.8; p = 0.015), NREM-AHI (RT: −20.5 ± 6.2 vs. +3.9 ± 3.9; p = 0.022), and arousals (RT: −7.9 ± 4.8 vs. +7.4 ± 5.1; p = 0.028). In the resistance training group, changes in AHI correlated with changes in waist circumference (r = 0.643, p = 0.018), suggesting reduced abdominal adiposity is at least part of the mechanism. The stretching control group showed a slight worsening of AHI over the same period.
What it means: A 21-event/hour reduction in AHI is clinically meaningful — it can shift a person with severe OSA (≥ 30 events/hour) into the moderate range, or push someone moderate into the mild range. The small sample (n = 25) limits confidence, and the study lacks a no-intervention arm, so some improvement may reflect regression to the mean. Still, the polysomnography-verified results and the waist-circumference correlation point toward a real mechanism.
Actionable takeaway: If you have moderate-to-severe OSA and can't tolerate CPAP, or want to complement your device-based treatment, an 8-week supervised resistance training program is worth discussing with your physician. For people with OSA who carry excess abdominal fat, waist reduction via resistance training may be the primary lever.
Study design: RCT (parallel-group), n = 25 adults with moderate-to-severe OSA, 8 weeks. Published in Sleep Medicine, Vol 142, 108879, 2026. DOI: 10.1016/j.sleep.2026.108879. PMID: 41806678.
Conflicts of interest: None reported.
Add more perspectives or context around this Post.