Exercise Longer

Michael O'Riordan. Aerobic activity modestly increases HDL-cholesterol
levels. theheart.org. [HeartWire > Prevention]; May 29, 2007. Accessed
at http://www.theheart.org/article/793601.do on May 30, 2007.

"In univariate analysis, the investigators found that only exercise
duration, and not frequency or intensity, was associated with
increases in HDL-cholesterol levels. When subjects exercised between
23 and 74 minutes per session, each 10-minute increase in duration was
associated with a 1.4-mg/dL increase in HDL cholesterol.

Like most meta-analyses, the study has limitations, the authors
acknowledge. This analysis is confined to published studies, and most
trials did not provide data on the period from the last exercise
session to the measurement, so the increase in HDL cholesterol
observed might be an acute effect. Most of the studies also failed to
include data on alcohol intake, which could affect HDL-cholesterol
levels, they add."

Jay

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