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In this month’s Latest Running Research episode, Brodie breaks down three high-impact studies that every runner should know about—covering sleep quality and injury risk, what actually gets injured during marathon running, and how strength training can improve running economy. If your goals are to run faster, stay injury-free, and train smarter in 2025, this episode delivers clear, evidence-based insights without the fluff.

We start with a standout prospective study tracking runners over six months, showing that poor sleep quality—not sleep quantity—significantly increases injury risk. Each one-point drop in perceived sleep quality increased injury risk by 36%, while rising fatigue and muscle soreness emerged as early warning signs in the 1–2 weeks before injury. The takeaway is clear: sleep quality, recovery monitoring, and subjective signals like soreness and fatigue deserve far more attention than most runners give them.

Next, we zoom out and examine a comprehensive review of marathon-related injuries, separating race-day injuries from training injuries and identifying the most commonly affected areas (thigh, knee, calf, foot, and ankle). The paper highlights both modifiable risk factors (training load, recovery, alcohol use, footwear transitions) and non-modifiable risks (age, sex, prior injury), offering valuable context for runners preparing for longer events or returning from injury.

Finally, the episode explores new research on strength training and running economy, focusing on how combining heavy resistance work with plyometrics (“complex training”) can meaningfully improve efficiency. The findings reinforce that strength training isn’t just for injury prevention—it directly improves how much energy you burn at a given pace, making it a powerful performance tool when programmed correctly.