Relation of running distance to plasma HDL-cholesterol level in middle-aged male runners.
This study examined the relation of training distance to plasma high density lipoprotein cholesterol (HDLC) concentration in runners. Forty-eight male endurance runners, aged from 30 to 57 years, were classified into three groups according to training distance (Grade I: n = 12, 30 km/week; Grade II: n = 22, 60 km/week; Grade III: n = 14, 100 km/week in average running distance), with 12 non-lean and 12 lean subjects as age-matched untrained controls. There were no significant differences in plasma total cholesterol among the groups (194-208 mg/dl on average). HDLC level was significantly higher in the untrained, lean group than in the untrained, non-lean men (63 +/- 13 vs. 46 +/- 8 mg/dl, mean +/- SD). HDLC levels in all the runner groups were significantly higher than in untrained, lean subjects, and no differences were observed among Grade I, II and III runner groups (76 +/- 15, 76 +/- 13, 77 +/- 11 mg/dl, respectively). This study suggests that further increases in HDLC could not occur in response to further elevation of training distance in well-trained runners.
Higuchi
M
M
Division of Health Promotion, National Institute of Nutrition, Tokyo, Japan.
Iwaoka
K
K
Fuchi
T
T
Kobayashi
S
S
Tamai
T
T
Takai
H
H
Nakai
T
T
D000328:Adult; D000367:Age Factors; D008076:Cholesterol, HDL / Q000097:blood*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010807:Physical Endurance; D005082:Physical Exertion; D012420:Running; D013997:Time Factors
D008076:Cholesterol, HDL