What is the concept of interleaving in training?

• A. Mixing the same task repeatedly to reinforce muscle memory.
• B. Training one task at a time in isolation.
• C. Mixing different tasks within a training session to improve retention and prevent monotony.
• D. Increasing rest periods between identical drills.

Answer: (C)

Interleaving means mixing different tasks within the same training session (or across sessions) instead of drilling the same task over and over in blocks. This forces you to switch gears, retrieve different strategies, and apply the right approach for each task, which strengthens how you recall and transfer skills to real situations. The varied practice creates a bit of “desirable difficulty” that, while it can feel harder in the moment, leads to better long-term retention and adaptability.

In a military training context, interleaving might have you move between rifle drills, map reading, medical aid, and movement techniques in one practice block. This mirrors the way operations demand quick task switching and flexible thinking.

The other approaches describe blocked practice—doing the same task repeatedly—or simply increasing rest, neither of which promotes the same level of retention and transfer as mixing different tasks does.