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Postprandial lipemia in obese men with abdominal fat patterning
L Wideman1, L A Kaminsky, M H Whaley
1Ball State University, Adult Physical Fitness Program, Muncie, Indiana, USA.
The Journal of Sports Medicine and Physical Fitness
|September 1, 1996
Summary
Obese men with abdominal fat patterning (OAF) exhibit impaired postprandial triglyceride (TG) clearance compared to men of desirable weight (DW). This suggests OAF men experience prolonged elevated blood lipids after consuming a fat load, even with normal fasting levels and physical activity.
Area of Science:
- Metabolic Health
- Lipid Metabolism
- Cardiovascular Risk Factors
Background:
- Obesity, particularly abdominal fat patterning (OAF), is linked to metabolic dysfunction.
- Postprandial lipemia, the temporary increase in blood lipids after a meal, is a marker of metabolic health.
- Understanding TG clearance differences is crucial for assessing cardiovascular disease risk.
Purpose of the Study:
- To compare postprandial triglyceride (TG) clearance between obese men with abdominal fat patterning (OAF) and men of desirable weight (DW).
- To test the hypothesis that OAF men have impaired TG clearance following an oral fat load.
Main Methods:
- A comparative study design involving 14 healthy, physically active, normolipemic men (7 OAF, 7 DW).
- Subjects consumed a standardized oral fat load (78g fat).
- Blood samples were collected hourly for 8 hours to measure postprandial lipemia markers (TG area, time to peak, etc.).
Main Results:
- OAF men showed significantly higher total area under the TG curve and greater maximum TG change post-fat load compared to DW men.
- Total TG area was positively correlated with baseline TG and inversely with baseline HDL2.
- Baseline HDL2 was inversely correlated with the time to return to baseline TG.
Conclusions:
- Obese men with abdominal fat patterning exhibit pronounced postprandial lipemia.
- Normal fasting lipid profiles and regular physical activity do not prevent impaired TG clearance in OAF men.
- These findings highlight a potential metabolic vulnerability in OAF individuals despite seemingly normal baseline health markers.