# High-intensity Interval Training and Mindfulness Breathing Induce Hormonal, Metabolic, and Anticarcinogenic Effects in Obese Postmenopausal Women: A Randomized Controlled Trial

PMID: 40891691
Journal: Journal of evidence-based integrative medicine
Published: 2025 Jan-Dec
Authors: Nagy EN, Shafiek M, Elsheimy H, Mogahed HG, Elsayed MM

## Question

Do 12 weeks of supervised cycling HIIT plus mindfulness breathing improve metabolic, hormonal, lipid, and tumor biomarker risk factors in obese postmenopausal women compared with medication-only control?

## Summary

Sixty obese postmenopausal women completed a 12-week randomized trial comparing medication alone with supervised cycling HIIT plus 5 minutes of mindfulness breathing and medication. The intervention group improved weight, BMI, HOMA-IR, lipids, sex hormones, and tumor biomarkers, with no reported negative effects, but the combined mindfulness plus HIIT design prevents isolating HIIT alone.

## Population

- Sedentary obese postmenopausal women with dyslipidemia and family cancer history.
- Sample size: 60
- Age: Mean 58.80 +/- 2.78 years; eligible 55-65 years
- Sex: Women only
- Fitness level: Sedentary; no regular exercise or diet program for at least one year
- Health status: Obese postmenopausal women, BMI about 35-44.9 kg/m2, dyslipidemia; diabetes, cardiovascular/autoimmune disease, tumors, hormone therapy, and other major conditions excluded

## Methodology

- Prospective randomized controlled trial
- 12 weeks
- Laboratory testing and supervised cycling sessions
- Randomized and controlled study design.

## Protocol

- Mindfulness breathing plus cycling HIIT.
- Modality: Stationary cycling.
- Work intervals: 60 seconds.
- Recovery: 75 seconds low-intensity cycling.
- Sets or repetitions: 10 bouts.
- Intensity: 85-90% peak heart rate for work; 40% PHR recovery; Borg 15-19.
- Session duration: About 32.5 minutes cycling plus 5 minutes mindfulness breathing.
- Frequency: 3 sessions/week.
- Program length: 12 weeks.
- Progression: Workload adjusted throughout to maintain target HR and Borg intensity.
- Medication-only control.
- Modality: Usual prescribed medications.
- Program length: 12 weeks.

## Outcomes

### Body weight
Status: improved
Experimental group weight and BMI decreased markedly while control increased.

Experimental weight 97.42 +/- 6.18 to 75.49 +/- 6.58 kg, p<0.001; BMI 37.88 +/- 1.93 to 30.53 +/- 1.65 kg/m2, p<0.001.

### HOMA-IR
Status: improved
Experimental HOMA-IR decreased and control HOMA-IR increased.

Experimental 2.65 +/- 0.59 to 1.24 +/- 0.3; control 2.63 +/- 0.45 to 2.91 +/- 0.35; p<0.001.

### Lipids
Status: improved
Experimental TC, TGs, and TC/HDL decreased and HDL increased; control worsened.

All abstract-reported lipid changes p<0.001.

### Safety
Status: no clear change
No negative effects of the intervention were reported.

## Practical Insights

- Clinical HIIT for older obese women used strict HR, BP, symptom, and hydration safeguards.
- The evidence applies to a combined mindfulness plus HIIT intervention, not HIIT alone.

## Limitations

- Cannot isolate mindfulness breathing effects
- Specific postmenopausal obese female sample
- Potential unmeasured diet and stress confounding
- Long-term adherence and sustained effects not reported

## Safety And Adherence

- No reported negative effects of the intervention.
- Per-session contraindications and termination criteria were specified.

## Original Sources

- [PubMed](https://pubmed.ncbi.nlm.nih.gov/40891691/) (pubmed)
- [DOI](https://doi.org/10.1177/2515690X251372718) (doi)
- [PMC full text](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12405701/) (full text)

## Agent Guidance

Preserve the paper-level scope of this note. Do not generalize beyond the population, protocol, measured outcomes, and limitations above.