While warming up is a standard component of most exercise sessions, the physiological why behind it often goes unexamined. As a health and exercise professional, you likely use warm-ups to help your clients prime their bodies, reduce injury risk, and prepare mentally and physically for the demands of a workout. But new research from Edith Cowan University offers clearer evidence on the specific mechanisms at play—particularly the role of muscle temperature in enhancing muscular performance. By analyzing decades of data, this study provides a more precise understanding of how warm-ups influence the contractile properties of muscle and challenges assumptions about the superiority of one warm-up modality over another.

This comprehensive meta-analysis, published in the Journal of Sport and Health Science, systematically examined 33 studies involving 921 participants. The research, led by Dr. Cody Wilson and colleagues JP Joao Pedro Nunes and Dr. Anthony Blazevich, specifically explored how increases in muscle temperature—triggered by either active or passive warm-ups—affect muscle performance. Their findings may lead you to reconsider both how you design warm-ups and how you explain their importance to clients.

Muscle Temperature: A 1°C Difference With Big Payoffs

At the heart of this study is one key physiological insight: warming the muscles improves their ability to contract rapidly. Based on the evidence, the researchers concluded that for every 1°C (or 1.8°F) increase in muscle temperature, there was a 3.7% improvement in voluntary rate-dependent contractile properties and a 3.2% improvement in evoked contractile properties.

“These improvements are primarily seen in explosive, speed- and power-based actions, such as jumping, sprinting or performing quick lifts,” explains Dr. Wilson. “The greatest benefits were seen in rate-dependent muscle properties like speed and power, but not in maximum strength.”

That nuance is crucial. While boosting muscle temperature didn’t significantly affect maximum voluntary force output—meaning how hard a person can push or pull—it did enhance their rate of force development and power output. In simpler terms: your clients might not get stronger from a warm-up, but they will likely get faster and more explosive, which is vital for performance in both athletic and functional settings.

Active vs. Passive Warm-Ups: More Similar Than You Might Expect

The research team evaluated two primary types of warm-up: active (e.g., light cardio, dynamic movement) and passive (e.g., hot packs, heated garments or a warm bath). Contrary to popular belief, the study found no significant difference in performance enhancement between these two approaches.

“Any warm-up is important, whether that’s just walking to the gym or doing a 10-minute cycle before your workout,” explains Dr. Wilson. “But there is some indication that warm-ups not related to the exercise being performed do not have as great an effect on performance as just ‘practicing’ the performance.”

Co-author and PhD student JP Nunes points out a key limitation in many of the analyzed studies: the lack of specificity between warm-up activity and the performance test. “If you are lifting weights, start by doing the exercise with lighter weights,” says Nunes. “The practice actually helps us to activate our muscles more and to use more efficient movement patterns—the nervous system can learn on-the-spot.”

Practice Over Perfection: The Role of Movement Specificity

This idea of specificity aligns with what you already know anecdotally: warm-ups that mimic the movement patterns of the actual workout tend to feel better and yield more consistent performance.

The study supports that intuition, though the authors caution that task specificity—along with other variables like the method of temperature measurement (muscle vs. skin), training status and sex—did not significantly affect the outcomes in statistical terms. That said, the authors acknowledge that insufficient data in certain subgroups may have limited more granular conclusions.

Still, Dr. Blazevich emphasizes a very practical takeaway: “As you are warming up, you will feel the movements become easier, and you will get more accurate and coordinated. You might even start to sweat. We often say that once you get that light sweat, you have probably raised your temperature sufficiently to start your workout.”

In other words, don’t wait for the stopwatch or thermometer to tell you when to begin. Let your client’s movement quality guide the way.

What the Research Means for Health and Exercise Professionals

So, what does all this mean for trainers, coaches and health professionals working on the gym floor, in group settings or with special populations? Here are some evidence-backed takeaways to help translate this research into practice:

1. Prioritize Warming Up, But Individualize It

The study reinforces that warm-ups are not optional. They meaningfully improve performance, especially in tasks involving speed and power. That said, the type of warm-up can be individualized based on the client’s needs, goals and preferences. For example, a passive warm-up might be appropriate for someone with joint pain or mobility issues before transitioning into light movement.

2. Use Movement Specificity to Maximize Impact

The performance boost from increased muscle temperature can be enhanced when the warm-up closely resembles the activity to follow. For clients preparing for strength training, this means using lighter sets of the actual exercises as part of the warm-up. For athletes or clients focused on movement quality or speed, dynamic drills that mimic their sport or workout are ideal.

3. Watch for the “Sweat Threshold”

As Dr. Blazevich notes, the onset of a light sweat is a good, simple indicator that muscle temperature has risen to a level where contractile function is enhanced. This is particularly useful for group fitness instructors or personal trainers in fast-paced environments who don’t have time for temperature measurement or long prep periods.

4. Don’t Underestimate Passive Strategies

While active warm-ups remain the norm, passive strategies—like heating pads or warm showers—can be useful alternatives or adjuncts, especially for clients with limitations. These methods may be especially helpful in colder climates or early morning sessions when core and muscle temperatures are lower to start.

5. Educate Clients on the “Why”

This research provides a concrete explanation for why warming up improves performance beyond just “getting ready.” Sharing that warming up improves rate of force development and neuromuscular efficiency can help increase client buy-in, especially among those who are skeptical or rushed.

Finally, if you’re looking for a nonspecific (yet effective) warm-up to give your clients, this sample active warm-up is a great option.

Final Thoughts

The bottom line from this extensive review is clear: Warming up improves your clients’ ability to move quickly and powerfully—but not necessarily their peak strength. While warm-up modality (active vs. passive) may not matter as much as previously thought, the specificity and intention behind the warm-up do. Exercise professionals should continue to treat warm-ups as a critical part of each session, using them not only to prepare the body, but also to optimize performance from the very first rep.

As Dr. Wilson says, “The warm-up might be just as important as the workout itself.” And now, there’s solid science to prove it.