Jiun Yi Chiang, Mei-Chich Hsu
Graduate Institute of Sports Science
National College of Physical Education & Sports, Taoyuan, Taiwan
CS (Cordyeeps sinensis) is a time-honored tonic food and Chinese herbal medicine. The purposes of this study are: (1) to determine the blood levels of luteinzing hormone (LH) and testosterone after taking CS. (2) to investigate the effects of CS supplementation on metabolic substrates, respiratory compositions and endurance performance, and (3) to investigate the effects of CS supplementation and heavy-resistance training on body composition, blood biochemistry, and total maximal muscle strength. Subjects ingested 3 capsules (400mg CS/capsule) twice a day. The results showed no significant difference of LH concentration in plasma before and after supplementation. After supplementation of CS, the testosterone increased 21.0 % for 21 days, and increased 11.5 % for 28 days as compared with the values of pre-supplementation. Four weeks of CS supplementation, the subjects tend to use free fatty acid as fuel source during the endurance exercise. However, CS supplementation may not improve submaximal endurance exercise performance in our study. Eight weeks of CS supplementation combined with heavy-resistance training could significantly increase hemoglobin level and total maximal muscle strength.
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