competitors, and such patterns are likely to impair sports performance (Koutedakis, 1995).
Additional effects of detraining include changes in serum lipid and lipoprotein concentrations. Motoyama, Sunami, Kinoshita, Irie, Sasaki, Arakawa, Kiyonaga, Tanaka, and Shindo (1995) studied the effects of long-term, low-intensity aerobic training and detraining in 30 elderly men and women. Subjects were placed in two groups: the training group used a treadmill; the control group did not perform any particular training. Training periods resulted in increased high density lipoprotein-cholesterol and decreased total cholesterol; no changes in triglyceride and low density lipoprotein-cholesterol levels were found. After one month of detraining, the high density lipoprotein-cholesterol levels decreased in five patients, and total cholesterol:high density lipoprotein-cholesterol levels increased for the group. Simsolo, Ong, and Kern (1993) also studied lipoprotein lipase regulation by exercise. Sixteen healthy athlete
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