Metabolic conditioning circuits, much beloved of CrossFit as is explained in their free article What is Fitness?
Here is a new bit of research that looks at this type of training. It compared circuit weight training with combined circuit training (weight training and treadmill run). The Combined Circuit Training wins......
Acute physiological responses to different circuit training protocols.
AIM: The purpose of present study was to compare the acute physiological responses to a circuit weight training with the responses to a combined circuit training (weight training and treadmill run).
RESULTS: Comparing circuit training protocols, it was noted that CCT elicits a higher relative and absolute VO(2) and energy expenditure values than CWT for both genders (P<0.05)
UPDATE - as a comment below notes the abstract doesn't really have enough detail to get us anywhere. Does anyone have access to the full paper?
Here is a gratuitous metcon video....