@article{KalliesRappFydrichetal.2018,
  author    = {Kallies, Gunnar and Rapp, Michael Armin and Fydrich, Thomas and Fehm, Lydia and Tschorn, Mira and Teran, Christina and Schwefel, Melanie and Pietrek, Anou F. and Henze, Romy and Hellweg, Rainer and Str{\"o}hle, Andreas and Heinzel, Stephan and Heissel, Andreas},
  title     = {Serum brain-derived neurotrophic factor (BDNF) at rest and after acute aerobic exercise in major depressive disorder},
  series = {Psychoneuroendocrinology},
  volume    = {102},
  journal   = {Psychoneuroendocrinology},
  publisher = {Elsevier},
  address   = {Oxford},
  issn      = {0306-4530},
  doi       = {10.1016/j.psyneuen.2018.12.015},
  pages     = {212 -- 215},
  year      = {2018},
  abstract  = {Physiological mechanisms of an anti-depressive effect of physical exercise in major depressive disorder (MDD) seem to involve alterations in brain-derived neurotrophic factor (BDNF) level. However, previous studies which investigated this effect in a single bout of exercise, did not control for confounding peripheral factors that contribute to BDNF-alterations. Therefore, the underlying cause of exercise-induced BDNF-changes remains unclear. The current study aims to investigate serum BDNF (sBDNF)-changes due to a single-bout of graded aerobic exercise in a group of 30 outpatients with MDD, suggesting a more precise analysis method by taking plasma volume shift and number of platelets into account. Results show that exercise-induced increases in sBDNF remain significant (p<.001) when adjusting for plasma volume shift and controlling for number of platelets. The interaction of sBDNF change and number of platelets was also significant (p=.001) indicating larger sBDNF-increase in participants with smaller number of platelets. Thus, findings of this study suggest an involvement of peripheral as well as additional possibly brain-derived mechanisms explaining exercise-related BDNF release in MDD. For future studies in the field of exercise-related BDNF research, the importance of controlling for peripheral parameters is emphasized.},
  language  = {en}
}
@article{HeisselPietrekFlungeretal.2018,
  author    = {Heissel, Andreas and Pietrek, Anou F. and Flunger, Barbara and Fydrich, Thomas and Rapp, Michael Armin and Heinzel, Stephan and Vansteenkiste, Maarten},
  title     = {The Validation of the German Basic Psychological Need Satisfaction and Frustration Scale in the Context of Mental Health},
  series = {European Journal of Health Psychology},
  volume    = {25},
  journal   = {European Journal of Health Psychology},
  number    = {4},
  publisher = {Hogrefe},
  address   = {G{\"o}ttingen},
  issn      = {2512-8442},
  doi       = {10.1027/2512-8442/a000017},
  pages     = {119 -- 132},
  year      = {2018},
  abstract  = {The primary aim of the current study was to examine the unique contribution of psychological need frustration and need satisfaction in the prediction of adults' mental well-being and ill-being in a heterogeneous sample of adults (N = 334; Mage = 43.33, SD = 32.26; 53\% females). Prior to this, validity evidence was provided for the German version of the Basic Psychological Need Satisfaction and Frustration Scale (BPNSFS) based on Self-Determination Theory (SDT). The results of the validation analyses found the German BPNSFS to be a valid and reliable measurement. Further, structural equation modeling (SEM) showed that both need satisfaction and frustration yielded unique and opposing associations with well-being. Specifically, the dimension of psychological need frustration predicted adults' ill-being. Future research should examine whether frustration of psychological needs is involved in the onset and maintenance of psychopathology (e.g., major depressive disorder).},
  language  = {en}
}