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Effects of acute salbutamol intake during supramaximal exercise in women
  1. Bénédicte Le Panse1,
  2. Alexandre Arlettaz1,
  3. Hugues Portier1,
  4. Anne-Marie Lecoq2,
  5. Jacques De Ceaurriz3,
  6. Katia Collomp4
  1. 1LAPSEP, Orléans, France
  2. 2Unité de physiopathologie de l’Exercice, LAPSEP, Orléans, France
  3. 3Département des analyses, AFLD, Orléans, France
  4. 4LAPSEP, Département des Analyses, AFLD, Orléans, France
  1. Correspondence to:
 Professor K Collomp
 LAPSEP, Département des Analyses, AFLD, Orléans, France; katia.collomp{at}univ-orleans.fr

Abstract

Objective: To study the effects of an acute therapeutic oral intake of β2 agonist on performance and substrate response during supramaximal exercise in women.

Methods: 12 healthy moderately trained female volunteers performed a Wingate test after ingestion of placebo (Pla) and salbutamol (Sal; 4 mg) according to a double-blind randomised crossover study. Blood samples were collected at rest, at the end of exercise and after 5 (r5), 10 (r10) and 15 (r15) min of passive recovery for adrenocorticotropic hormone (ACTH), growth hormone (GH), insulin, blood glucose and lactate measurements.

Results: Peak power (PP) and mean power (MP) significantly increased whereas time to peak power was significantly shorter with Sal than with Pla (p<0.05). No change was observed in the fatigue index. ACTH was not significantly modified but r15 growth hormone significantly decreased (p<0.05) after the intake of Sal. Both blood INS and blood glucose were significantly increased by the intake of Sal during all the experiments (p<0.01). Blood lactate was significantly increased by the intake of Sal compared with that of Pla (p<0.05) after 10 and 15 min of passive recovery.

Conclusion: From these data, acute therapeutic oral intake of Sal seems to induce, irrespective of the subjects’ gender, an improvement in performance during a supramaximal exercise—that is, increase in PP and MP. Further studies are necessary to clarify whether the mechanisms involved in the response to intake of Sal are linked to central and/or peripheral pathways.

  • ANOVA, analysis of variance
  • ACTH, adrenocorticotropic hormone
  • EIB, exercise-induced bronchoconstriction
  • GH, growth hormone
  • Glu, glucose
  • Ins, insulin
  • Lac, lactate
  • MP, mean power
  • OC, oral contraceptive
  • Pla, placebo
  • PP, peak power
  • Sal, salbutamol
  • TTPP, time to peak power

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Footnotes

  • Published Online First 30 January 2007

  • Competing interests: None.

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