Quark CPET - Stationaire ergospirometrie:
Breath x breath & mixing chambre
https://ncur.ithaca.edu/ncur/search/Display_NCUR.aspx?id=50383

K4b2 - Mobiele ergospirometrie:
http://www.ncbi.nlm.nih.gov/pubmed/11414671

Quark RMR - Indirecte calorimetrie:
http://www.e-spenjournal.org/article/PIIS175149911000065X/abstract?rss=yes

Fitmate - Indirecte calorimetrie en ergospirometrie:
RMR
http://www.ncbi.nlm.nih.gov/pubmed/16869134
VO2-max
http://www.ncbi.nlm.nih.gov/pubmed/17365953
VO2-submax
http://journals.lww.com/nsca-jscr/Abstract/2011/09000/Validation_of_the_Cosmed_Fitmate_for_Prediction_of.29.aspx

Lifecorder - Physical activity monitor:
http://journals.lww.com/acsm-msse/Citation/2006/05001/Comparison_of_Lifecorder_and_MTI_ActiGraph.1356.aspx