Effect of heavy increase in training stress on the plasma leptin concentration in highly trained male rowers.
OBJECTIVE
To characterize the effects of a heavy increase in training stress followed by a reduced stress on fasting plasma leptin levels in highly trained male rowers.


METHODS
12 rowers underwent a 3-week period of maximally increased training stress followed by a 2-week tapering period.


RESULTS
A mean 22% increase in training stress caused a significant decrease (by 8%) in the leptin concentrations. A further increase in training stress by 25% significantly reduced leptin further by 35%. A 1st tapering week, during which the training stress was rapidly reduced by approximately 50%, significantly increased the plasma leptin concentrations by 29%. Plasma leptin was significantly increased further (by 4%) during the 2nd tapering week.


CONCLUSIONS
Leptin is sensitive to pronounced changes in training stress in highly trained male rowers.
Mäestu
Jarek
J
Chair of Sport Pedagogy, Faculty of Exercise and Sport Sciences, University of Tartu, Tartu, Estonia.
Jürimäe
Jaak
J
Jürimäe
Toivo
T
D000328:Adult; D001786:Blood Glucose / Q000378:metabolism; D001835:Body Weight / Q000502:physiology; D003402:Creatine Kinase / Q000097:blood; D005215:Fasting / Q000378:metabolism; D006801:Humans; D007328:Insulin / Q000097:blood; D020738:Leptin / Q000097:blood*; D008297:Male; D010809:Physical Fitness / Q000502:physiology*; D013312:Stress, Physiological / Q000097:blood*
D001786:Blood Glucose; D007328:Insulin; D020738:Leptin; D003402:Creatine Kinase