
The analysis comprised 20 effects in 16 relevant studies published up to August 2015. We conducted a computerized search of the PubMed and Web of Science databases, and references of original studies were searched for further relevant studies. To evaluate the effect of concurrent training on RE in endurance running athletes and identify the effects of subject characteristics and concurrent training variables on the magnitude of RE improvement. In this context, concurrent strength and endurance training has been considered an effective method, although conclusions on the optimal concurrent training cannot yet be drawn. Defined as the oxygen uptake required at a given submaximal running velocity, it has been considered a key aerobic parameter related to endurance running performance.


Several strategies have been used to improve running economy (RE).
