How Physical Inactivity Affects Fat Metabolism
Author Information
Author(s): Bergouignan Audrey, Schoeller Dale A, Normand Sylvie, Gauquelin-Koch Guillemette, Laville Martine, Shriver Timothy, Desage Michel, Maho Yvon Le, Ohshima Hiroshi, Gharib Claude, Blanc Stéphane
Primary Institution: Institut Pluridisciplinaire Hubert Curien, Strasbourg, France
Hypothesis
Physical inactivity partitions dietary fats toward storage and that a resistance exercise training program mitigates storage.
Conclusion
Physical inactivity decreased the oxidation of saturated but not monounsaturated dietary fat, and this effect is not compensated by resistance exercise training.
Supporting Evidence
- Physical inactivity led to a nearly 10% decrease in the oxidation of saturated fat.
- Resistance exercise did not significantly affect fat oxidation rates.
- The study used a unique model of enforced inactivity through bed rest.
Takeaway
When people don't move much, their bodies have a harder time using certain types of fat for energy, which can lead to weight gain.
Methodology
The study involved 18 healthy male volunteers undergoing 90 days of bed rest, with one group also participating in resistance exercise training.
Potential Biases
Potential selection bias due to strict participant criteria and the small number of participants.
Limitations
The small sample size and the extreme nature of the bed rest model limit the generalizability of the findings.
Participant Demographics
18 healthy male volunteers, mean age 32.6 years, BMI 23.6 kg/m2.
Statistical Information
P-Value
p = 0.01
Confidence Interval
95% CI, −19.0% to −2.9%
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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