Does Resisted Sled Training Improve Sprint Speed? What the Research Shows

If you've spent time around a track, a football field, or a performance gym, you've probably seen athletes strapped to a sled, grinding through sprints with added resistance. Resisted sled training has become a popular tool for coaches and athletes looking to develop explosive speed. But does the science actually support it? A systematic review and meta-analysis published in Sports Medicine took a close look at the available research on resisted sled sprinting to determine whether it genuinely improves sprint performance — and what factors influence those results. Here's what the study found and what it might mean for your own training.

What This Study Examined

The researchers set out to answer a straightforward but important question: is resisted sled training an effective method for improving sprint performance? While sled pushing and pulling had already become fixtures in many athletic training programs, the body of research supporting the practice had not been formally pooled and analyzed in a comprehensive way.

The study focused specifically on resisted sled sprinting — where an athlete sprints while towing a weighted sled — and examined how different loading strategies affected outcomes. The central variables of interest included sprint speed improvements across different phases of a sprint (acceleration, maximum velocity, and overall sprint time), as well as how the amount of load used during training influenced the results.

How the Study Was Conducted

This was a systematic review and meta-analysis, which means the researchers did not conduct new experiments themselves. Instead, they systematically searched the existing scientific literature, identified studies that met their inclusion criteria, and statistically combined the results to draw broader conclusions than any single study could provide on its own.

The review analyzed data from multiple controlled studies in which participants performed resisted sled sprint training over a defined period. The researchers evaluated outcomes related to sprint performance and compared groups who used resisted sled training against control groups or other training methods. They also examined whether the amount of load placed on the sled — ranging from lighter to heavier resistances — made a meaningful difference in the results.

By aggregating data across studies, the meta-analysis was able to identify patterns and effect sizes that help clarify how effective this training method tends to be in practice.

Key Findings

The review produced several notable findings worth understanding:

• Resisted sled training was found to be effective for improving sprint performance. Across the studies analyzed, athletes who performed resisted sled sprinting showed meaningful improvements in sprint-related outcomes compared to those who did not.

• Loading strategy matters. The amount of resistance used during sled training influenced how much benefit athletes experienced. The results suggest that the load placed on the sled is an important variable to consider when designing a program.

• Both lighter and heavier loads appeared to produce benefits, though the nature and magnitude of those benefits varied depending on the loading condition. This points to the idea that different loads may target different aspects of sprint performance, such as acceleration versus top-end speed.

• The findings support resisted sled sprinting as a practical and evidence-based tool for coaches and athletes focused on speed development, provided the training is structured thoughtfully.

These results suggest that resisted sled training is not a one-size-fits-all solution, but rather a method that can be customized based on the specific performance goals of the athlete.

What This Means for Training

Taken together, these findings suggest that resisted sled training can be a valuable addition to a speed development program — but that how you load the sled matters just as much as whether you use one at all.

For athletes focused on improving acceleration out of a starting position, heavier loads that challenge the early drive phase of a sprint may be more appropriate. For those looking to develop top-end velocity or maintain sprint mechanics under fatigue, lighter loads that allow for faster movement speeds could be more effective. General coaching practice has long emphasized this distinction, and the research appears to support it.

It's also worth noting that sled training doesn't replace foundational speed work — it complements it. Sprint mechanics, strength training, and recovery all play critical roles in athletic development. Resisted sled work is most useful when it's part of a well-rounded, periodized program rather than a standalone approach.

If you're working with a personal trainer in Reno, this kind of research can inform how sprint-focused programming is built around your specific goals. Athletes at different levels and in different sports may respond differently to various loading strategies, which is one reason individualized guidance from a knowledgeable coach tends to produce better outcomes than generic programming.

Limitations of the Study

As with any systematic review, it's important to understand where the evidence has its limits:

• Variation across included studies. The individual studies pooled in the meta-analysis likely differed in terms of participant populations, training protocols, duration, and measurement methods. This heterogeneity can make it harder to draw precise, universal conclusions.

• Population specificity. Many of the studies in sport science research involve trained athletes or physically active individuals. The findings may not translate directly to beginners or populations with different fitness profiles.

• Training duration variability. Studies conducted over shorter periods may not capture how resisted sled training performs over a longer training cycle, or how results change as athletes become more conditioned.

• Limited abstract detail. Because a full breakdown of all included studies was not available for this summary, the conclusions here are based on the overarching findings reported in the review rather than granular data from each individual study.

These limitations don't undermine the value of the research, but they do reinforce the importance of applying findings thoughtfully rather than treating them as universal rules.

Conclusion

The research reviewed here suggests that resisted sled training is a legitimate and effective tool for improving sprint performance — and that the loading strategy used during training plays a meaningful role in shaping those results. This kind of evidence helps coaches and athletes make more informed decisions about how to structure speed development programs rather than relying on guesswork or habit.

Whether you're an athlete trying to shave time off your sprint or someone building a more powerful lower body, understanding the research behind your training methods is a meaningful step toward better results. Working with an evidence-informed coach who understands how to apply findings like these to your specific goals can make a significant difference. You can explore Atlas Personal Trainings if you're looking for structured, research-backed guidance in the Reno area.

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Source

Cahill, M.J., Oliver, J.L., Cronin, J.B., et al. The Effectiveness of Resisted Sled Training for Sprint Performance: A Systematic Review and Meta-analysis. Sports Medicine. 2019.

Research Source: The Effectiveness of Resisted Sled Training for Sprint Performance: A Systematic Review and Meta-analysis