Concurrent training
Redirected from "Combining cardio and strength"
Also known as: Combining cardio and strength
Concurrent training means deliberately including both strength training and aerobic or cardio training in the same overall program. The two modes may occur in one session, at different times on the same day, or on separate days. The goal is to develop both qualities while managing the fatigue and scheduling demands created by their combination.
The "interference effect" describes the possibility that adding endurance work reduces some adaptation compared with strength training alone, or vice versa. It is not an all-or-nothing switch. A 2022 meta-analysis of 43 studies found no significant average reduction in whole-muscle hypertrophy or maximal-strength development from concurrent training. Gains in explosive strength were more likely to be attenuated, especially when aerobic and strength work took place in the same session.
Newer evidence adds uncertainty rather than a simple reversal. A 2024 meta-analysis focused on sex and training status found a small reduction in lower-body strength gains in men but not women, no sex difference for upper-body strength or power, and too little hypertrophy evidence for that analysis to draw a conclusion. Most research still contains more men than women and relatively few highly trained athletes. Group averages therefore cannot predict one lifter's result with certainty.
The practical priority is to preserve the quality of the work that matters most. If strength is the main goal and both modes must share a session, lifting first usually prevents prior endurance fatigue from reducing the weights or speed you can use. If endurance performance is the priority, the key endurance session may come first. Separating demanding sessions by several hours or different days can make both easier to execute well, but there is no universal number of hours that guarantees no interaction.
Manage the combination through fatigue management, not fear of cardio. Consider the endurance mode, impact, duration, intensity, weekly frequency, and which muscles it loads. Easy cycling after an upper-body session is a different problem from hard running intervals next to heavy squats. Add one variable at a time, monitor performance and recovery, and reduce or move the work that repeatedly harms the priority sessions. The specificity principle still applies: train both qualities directly, with the more important goal receiving the freshest time and most recoverable volume.