BAD NEWS
Abdominal Visceral Fat (aka Belly Fat) has been strongly linked to:
- Depression
- Heart Disease
- Cancer
- Systemic Inflammation
- Diabetes
- Metabolic Syndrome
- Death
In a nutshell, a big gut is not a good thing.
GOOD NEWS
High Intensity (HIIT and/or HIRT) Training burns off belly fat faster than any other form of exercise.

The Science
Study # 1
In 2008, researchers took 27 middle-aged obese women with metabolic syndrome and subjected them to one of three exercise programs.
- Group 1 was the no-exercise control group
- Group 2 was the low intensity (aerobic) exercise group -
- Group 3 was the high intensity (HIIT) exercise group
Groups 2 & 3 performed 5 workouts per week @ 400 calories per workout.
After 16 weeks, the HIIT group had significantly reduced total abdominal fat, abdominal subcutaneous fat and most importantly abdominal visceral fat.
Sadly, Groups 1 & 2 saw no significant changes in fat loss.
Study # 2
In study #2, researchers took 45 normal women (mean BMI 23.2
2.0 kg m-2 and age of 20.2
2.0 years) and subjected them to a 15 week HIIT exercise program.
As in the first study, the women were divided into 3 groups.
- Group 1 was the no-exercise control group
- Group 2 was the low intensity (aerobic) exercise group -
- Group 3 was the high intensity (HIIT) exercise group
After 15 weeks, both exercise groups demonstrated a significant improvement in cardiovascular fitness.
However, only the HIIT group had a significant reduction in:
- total body mass (TBM),
- fat mass (FM),
- trunk fat
- and fasting plasma insulin levels.
.
Conclusion
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Further Reading:
Reference





In study 1, did group 3 really performed HIIT 5 times a week? In the real world, you likely can't perform it more than 3 times a week at maximum intensity because you would be too tired and slow down. Even if you can, you may overtrain.
For low intensity cardio, what was the heart rate, and did they exercise until they can carry on breathless continuously?
I've read articles stating that cardio (75% HR) was more effective than resistance training or both combined. Resistance training had no reduction
It would be interesting to know if HIIT or cardio has a bigger preferential target for visceral fat. Incorporating HIIT certainly is better for overall reduction of body fat than steady state cardio.
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