title: Adiponectin responses to acute moderate and heavy exercises in overweight middle aged subjects.
abstract: OBJECTIVE
  The purpose of this study was to investigate the effect of acute moderate and heavy exercises on adiponectin, leptin and insulin concentrations in untrained subjects.
  
  
  METHODS
  Seven overweight middle-aged males participated in this study (age: 36.00 ± 5.16 years; body weight: 93.94 ± 6.48 kg; percent body fat: 26.64 ± 2.75%; Body Mass Index: 28.32 ± 1.74 kg.m2). They took part in two sub-maximal cycling exercises; moderate; 20 min cycling at 60% of peak aerobic power (PAP) and heavy: 20 min cycling at 80% of PAP. Venous blood samples were obtained before, after 30, 60 and 90 min recovery.
  
  
  RESULTS
  Adiponectin concentrations were unchanged (P>0.05) after exercises. However, leptin was significantly decreased under resting values after 30 min (-12.74%, P=0.0023), 60 min (-11.66%, P=0.0084) and 90 min (-8.42%, P=0.0023) after the heavy exercise. Similarly, insulin was lowered after 90 min after the heavy exercise (-55.96%, P=0.014). Basal adiponectin during moderate exercise was significantly and negatively related to BMI (r=-0.778, P=0.033) and percent body fat (r=-0.897, P=0.0061).
  
  
  CONCLUSIONS
  In conclusion our results suggested that 20 min moderate or heavy sub-maximal exercises not stimulate the production and the release of adiponectin during 1.5 hour recovery post-acute exercises. Furthermore, it appears that after acute heavy exercise adiponectin is not associated with leptin or/and insulin modifications.
authors.affiliation: Laboratoire des adaptations cardio-circulatoires, respiratoires, métaboliques et hormonales à l'exercice musculaire, Faculté de Médecine Ibn El Jazzar, Sousse, Tunisie. bouassida_anissa@yahoo.fr
authors.forename: A
authors.initials: A
authors.lastname: Bouassida
authors.forename: N
authors.initials: N
authors.lastname: Lakhdar
authors.forename: N
authors.initials: N
authors.lastname: Benaissa
authors.forename: S
authors.initials: S
authors.lastname: Mejri
authors.forename: M
authors.initials: M
authors.lastname: Zaouali
authors.forename: A
authors.initials: A
authors.lastname: Zbidi
authors.forename: Z
authors.initials: Z
authors.lastname: Tabka
mesh_terms: D052242:Adiponectin / Q000097:blood*; D000328:Adult; D000704:Analysis of Variance; D015992:Body Mass Index; D004734:Energy Metabolism; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D006801:Humans; D007328:Insulin / Q000097:blood; D020738:Leptin / Q000097:blood; D008297:Male; D050177:Overweight / Q000097:blood*; D018709:Statistics, Nonparametric
chemical_list: D052242:Adiponectin; D007328:Insulin; D020738:Leptin