Dissociation of performance parameters at the IAT requires specific exercise recommendations for depressed patients.
Aerobic exercise training is considered an adequate complementary treatment strategy for major depressive disorder (MDD). However, there is a need for comparative methodological investigations to determine the appropriate exercise intensity for these patients. The study compared submaximal exercise intensity determination with those derived from maximal parameters such as percentages of heart rate reserve (HRR), maximal heart rate (HR(max)) and peak oxygen uptake (VO(2peak)) of patients and controls. An exhaustive incremental bicycle exercise test was completed by 15 female MDD patients and matched controls. The individual anaerobic lactate threshold (IAT) as a gold standard to determine individual aerobic exercise intensity was assessed according to Stegmann and coworkers. Exercise intensities at 70 and 85% of HR(max), 70 and 85% of HRR and 50 to 80% of VO(2peak) were compared to the IAT. Patients suffering from MDD switched earlier to anaerobic metabolism than matched healthy controls. But interestingly, the level of self-rated perceived exertion, concentration of lactate, respiratory exchange ratio and heart rate at the IAT level revealed no significant difference between both groups. Due to a growing number of clinical aerobic exercise treatments in depressive disorders exercise intensities >70% of (a) HR(max), (b) HRR, (c) VO(2peak) should be amended by the IAT and Borg scale measurements to avoid over challenging as well as increased anaerobic metabolism.
Donath
Lars
L
Department of Sports Medicine, Friedrich-Schiller-University Jena, Woellnitzer Strasse 42, D-07749 Jena, Germany. lars.donath@uni-jena.de
Boettger
Silke
S
Puta
Christian
C
Wetzig
Franziska
F
Mueller
Hans Josef
HJ
Bär
Karl-Jürgen
KJ
Gabriel
Holger H W
HH
D000328:Adult; D015308:Anaerobic Threshold / Q000502:physiology*; D000704:Analysis of Variance; D001642:Bicycling; D003863:Depression / Q000503:physiopathology* / Q000534:rehabilitation*; D015444:Exercise / Q000502:physiology; D005080:Exercise Test / Q000379:methods*; D005260:Female; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D019344:Lactic Acid / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D009043:Motor Activity; D010101:Oxygen Consumption / Q000502:physiology; D010807:Physical Endurance / Q000502:physiology; D011795:Surveys and Questionnaires
D019344:Lactic Acid