Complex and Contrast Training: Does Strength and Power Training Sequence Affect Performance-Based Adaptations in Team Sports? A Systematic Review and Meta-analysis.

Strength and conditioning coaches often combine heavy resistance exercises with explosive power exercises in the same session, but there are different ways to order them, and it is not clear which sequencing gets better results. This review pooled 27 studies comparing two approaches in team-sport athletes: complex training, which alternates a heavy strength exercise with a related power exercise set by set, and contrast training, which groups all strength work first and all power work afterward. Both approaches were followed by improvements in strength, vertical jump, sprinting, and change of direction ability, with complex training generally showing somewhat larger effects across these measures. The findings are interesting because they suggest the order in which strength and power exercises are performed may matter for outcomes, not just whether both are included.

However, these are before-and-after comparisons across a varied set of studies, and the review itself does not report details on risk of bias, exercise intensity, or duration that would let coaches know exactly how much sequencing explains the difference.

If you've ever done a workout mixing heavy lifting with jumping or sprinting drills, you might wonder if the order of those exercises matters. This review looked at that question in athletes from team sports like soccer or basketball, comparing two training styles: one that alternates a heavy exercise with a lighter power exercise back and forth, and one that does all the heavy lifting first and all the power work afterward. People in both types of programs generally got stronger, jumped higher, ran sprints faster, and changed direction more quickly after training, when compared to how they performed before starting.

The style that alternated exercises tended to show somewhat bigger improvements, though both approaches led to gains. This is useful information for understanding how training structure might influence outcomes, but it comes from combining many different studies with their own designs and participants, so it does not tell us precisely why one sequence had an edge or whether the difference would hold true for everyone.

This is a summary of research, not medical advice. Talk to your own healthcare provider about anything affecting your care.

The clinical question here is whether the way strength and power exercises are sequenced within a session, complex training (alternating heavy and light sets) versus contrast training (strength block followed by power block), differentially affects performance outcomes relevant to team-sport athletes under a physiotherapist's care during return-to-performance or off-season conditioning phases. Across 27 pooled studies, baseline-to-postintervention effects favored complex training slightly over contrast training for strength (1RM, large effect for both, SMD 2.01 vs 1.29), vertical jump (large vs medium, SMD 0.88 vs 0.55), sprint performance (large vs small, SMD -0.94 vs -0.27), and change of direction (large vs medium, SMD -1.17 vs -0.68).

When restricted to studies with control groups, both approaches still showed meaningful effects relative to controls, though the contrast training sprint effect that was small overall became medium with controls included, and no controlled comparison was available for contrast training on change of direction. This synthesis supports that sequencing within combined strength-power sessions may influence the magnitude of adaptation, but the abstract does not specify study designs, risk of bias, or standardization of intensity and duration across the pooled trials, and these moderators (athlete level, sport type, dosage) were examined as potential influences without reported individual results, limiting how confidently sequencing recommendations can be drawn for a specific athlete population.