title: Relationships between leptin levels and carbohydrate intake during rowing training.
abstract: OBJECTIVE
  This study was designed to determine the relationship between diet and leptin levels during rowing training.
  
  
  METHODS
  Dietary intakes using 3-day food records, training volume and leptin responses to a 90-min exercise (measurement before, at the end and after 2 and 24 h of recovery) were assessed at the beginning and at the end of an 8-month training season for heavyweight rowers.
  
  
  RESULTS
  During the training, we observed increases in energy intake and in training volume (12.1+/-1.8 and 14+/-1.4 MJ/day, and 3.8+/-1.1 and 6.5+/-1.8 sessions/week, respectively at the beginning and at the end of the season). Carbohydrate (CHO) and protein intakes were increased (P<0.001 and P<0.05, respectively), whereas those of lipid were unchanged (P=0.08). Leptin levels at rest were unchanged, while delayed decreases occurred (at 2 h postexercise) in response to the 90-min exercise (P<0.01). At the end of the season, postexercise and 24 h postexercise leptin levels were positively correlated to CHO intake (r=0.62 and r=0.69, respectively; P<0.05).
  
  
  CONCLUSIONS
  There is an increase in CHO intake over a training season for rowers. Our results suggested that repeated hypoleptinemia in response to acute exercise triggered the particular choice of CHO in order to insure the energy homeostasis.
authors.affiliation: Department of Physiology, IMASSA - BP 73, Brétigny/Orge Cedex, France. f.desgorces@free.fr
authors.forename: F D
authors.initials: FD
authors.lastname: Desgorces
authors.forename: M
authors.initials: M
authors.lastname: Chennaoui
authors.forename: C
authors.initials: C
authors.lastname: Drogou
authors.forename: C Y
authors.initials: CY
authors.lastname: Guezennec
authors.forename: D
authors.initials: D
authors.lastname: Gomez-Merino
mesh_terms: D000328:Adult; D000886:Anthropometry; D015992:Body Mass Index; D050260:Carbohydrate Metabolism; D004040:Dietary Carbohydrates / Q000008:administration & dosage*; D004435:Eating; D004734:Energy Metabolism; D015444:Exercise / Q000502:physiology*; D006728:Hormones; D006801:Humans; D020738:Leptin / Q000097:blood* / Q000378:metabolism; D008297:Male; D009752:Nutritional Status; D013177:Sports / Q000502:physiology*
chemical_list: D004040:Dietary Carbohydrates; D006728:Hormones; D020738:Leptin