A 30 - second exercise bout is adequate to allow for this because most participants are able to acquire and maintain appropriate intensity for 30 seconds. (journals.lww.com)
Directions: Compete the main exercise for 20 seconds of work followed by 10 - second active rest with second exercises. (onnit.com)
I find that when I am also feeling out of control, this 30 second exercise helps me feel much calmer and more focused. (sportstarsmag.com)