title: The effect of a clinically practical exercise on levodopa bioavailability and motor response in patients with Parkinson disease.
abstract: OBJECTIVE
  The aim of the study was to investigate the potential effect of short, moderate intensity (≤70% maximum heart rate) cyclette exercise on levodopa (LD)/dopa decarboxylase inhibitor bioavailability and motor response in a subgroup of Parkinson disease (PD) patients presenting a moderate-to-severe delay in fasting morning LD dose absorption and matched motor response.
  
  
  METHODS
  Ten patients underwent an oral LD instrumental kinetic-dynamic test based on simultaneous serial measurements of plasma LD concentrations, finger tapping motor effects, dyskinesia ratings plus Unified Parkinson Disease Rating Scale Motor Section (section III) evaluation after ingestion of their usual fasting first morning LD dose, on 2 occasions, 2 weeks apart, according to an intrasubject randomized cross-over design: once receiving their oral LD test dose immediately before a 15-minute cycling and once at seated rest. The main LD pharmacokinetic variables were time to peak, peak plasma concentration, and the area under the 4-hour plasma concentration-time curve. The main LD pharmacodynamic variables were the latency, duration of the motor effect elicited by the LD test dose, and the area under the 4-hour tapping effect-time curve.
  
  
  RESULTS
  The LD pharmacokinetics and pharmacodynamics did not differ between the 2 sessions.
  
  
  CONCLUSIONS
  We found no significant effect of a moderate, clinically practical exercise on LD rate and extent of absorption and matched motor response in a subgroup of patients with delayed LD kinetic-dynamic effect.
authors.affiliation: Department of Neurological Sciences University of Bologna, Bologna, Italy.
authors.forename: Giovanna
authors.initials: G
authors.lastname: Lopane
authors.forename: Manuela
authors.initials: M
authors.lastname: Contin
authors.forename: Cesa
authors.initials: C
authors.lastname: Scaglione
authors.forename: Fiorenzo
authors.initials: F
authors.lastname: Albani
authors.forename: Agostino
authors.initials: A
authors.lastname: Baruzzi
authors.forename: Paolo
authors.initials: P
authors.lastname: Martinelli
mesh_terms: D000978:Antiparkinson Agents / Q000493:pharmacokinetics* / Q000627:therapeutic use; D001545:Benserazide / Q000627:therapeutic use; D018592:Cross-Over Studies; D004338:Drug Combinations; D020820:Dyskinesias / Q000188:drug therapy / Q000503:physiopathology; D004791:Enzyme Inhibitors / Q000627:therapeutic use; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D005260:Female; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D007980:Levodopa / Q000493:pharmacokinetics* / Q000627:therapeutic use; D008297:Male; D008875:Middle Aged; D009043:Motor Activity / Q000187:drug effects; D010300:Parkinson Disease / Q000378:metabolism* / Q000503:physiopathology; D012720:Severity of Illness Index; D016896:Treatment Outcome
chemical_list: D000978:Antiparkinson Agents; D004338:Drug Combinations; D004791:Enzyme Inhibitors; C005177:benserazide, levodopa drug combination; D007980:Levodopa; D001545:Benserazide