Check out the comparison of 3 Laser/light therapy units done by the

Sports Medicine Group at the University of Caxias do Sul, Brazil

Published in the Journal of Athletic Training, March 16, 2017

Click here:   Study 3-17   for the info-graphic  with charts

and the complete article publication  here: 

Mar2017_JAT_Thiago_Phototherapy for improvement of performance and exercise recovery – comparison of 3 commercially available devices