By Body Alchemy Admin
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January 24, 2025
If you’re new to weightlifting, you’ve probably heard about ways to measure how hard you’re working during a set. One method that’s gaining popularity among strength and hypertrophy-focused lifters is the Rate of Perceived Exertion (RPE). While it might sound technical, RPE is a simple and effective tool to help you tailor your workouts to your goals and current abilities. Let’s break it down. What is RPE? RPE is a scale that helps you gauge how hard a set feels based on your perception of effort. Originally developed by Dr. Gunnar Borg for aerobic exercise, RPE has been adapted for strength training. The modified RPE scale for weightlifting typically runs from 1 to 10: 1-3 RPE: Very light effort, often used for warm-ups or recovery work. 4-6 RPE: Moderate effort, challenging but far from failure. 7-9 RPE: Hard effort, with 1-3 reps left in the tank. 10 RPE: Maximal effort, no reps left in the tank (true failure). For example, if you perform a set of squats at 8 RPE, it means you’re working hard but could still complete 2 more reps if pushed. RPE vs. Other Methods of Measuring Effort RPE isn’t the only way to gauge intensity. Here’s how it compares to other common methods: Percentage of 1-Rep Max (%1RM): This method uses a percentage of your maximal lift (e.g., lifting 75% of your max for 8 reps). While precise, it assumes your max stays constant, which might not reflect daily variations in strength due to factors like fatigue or stress. Reps in Reserve (RIR): RIR is closely related to RPE and measures how many reps you have left before failure. If you finish a set with 2 RIR, it corresponds to about 8 RPE. Both RPE and RIR are flexible and adapt to daily fluctuations in performance. Heart Rate Monitoring: Useful for cardio, but not practical for strength training since heart rate doesn’t directly correlate with lifting effort. Load Progression: Simply increasing weight each week. While effective for beginners, this doesn’t account for how you feel on any given day, potentially leading to overtraining or injury. RPE stands out because it’s subjective and adaptable. It allows you to auto-regulate—adjust your effort based on how you feel that day—making it especially useful for strength and hypertrophy training. Why RPE is Perfect for Beginners When starting out, you might not know your 1-rep max or how many reps you can do before failure. RPE lets you focus on effort rather than exact numbers. Over time, it teaches you to tune into your body’s signals, a skill that will serve you well as you progress. How to Perfect the Skill of Determining RPE Accurately judging RPE takes practice. Here are some tips: Start with Submaximal Sets: Perform sets where you purposely stop 2-3 reps before failure and ask yourself how hard it felt. Reflect on whether you could realistically complete more reps. Film Your Sets: Record yourself lifting and compare how the set looks versus how it felt. This can help you calibrate your perception of effort. Track Your Progress: Keep a workout log and note the RPE for each set. Over time, patterns will emerge, helping you understand your limits. Use Cluster Sets to Practice: Perform sets with a weight you can lift for 10 reps, but only do 6-7 reps. Gauge your RPE after each set to see how consistent you are. Ask a Coach or Training Partner: They can provide feedback and help you judge whether your RPE aligns with your actual effort. The Role of RPE in Strength and Hypertrophy Training Strength Training: RPE allows you to lift heavy but avoid overexertion. For example, training at 7-9 RPE ensures you’re working hard while leaving enough energy to complete multiple sets or sessions. Hypertrophy Training: Research suggests that training at 6-8 RPE is ideal for muscle growth (Schoenfeld, 2016). This range lets you accumulate volume without overfatiguing your muscles. Backed by Science A 2018 study in the Journal of Strength and Conditioning Research found that RPE-based training is as effective as %1RM methods for building strength, with the added benefit of auto-regulation. Another study by Helms et al. (2017) highlighted that RPE is particularly effective for hypertrophy training, as it encourages sufficient intensity while managing fatigue. Final Thoughts RPE is an invaluable tool for lifters of all levels, especially beginners. By learning to gauge your effort and adjust accordingly, you’ll maximize your results while minimizing the risk of burnout or injury. Start practicing today, and you’ll build a strong foundation for long-term success in the gym. ### Cited Sources Schoenfeld, B. J. (2016). "Science and Development of Muscle Hypertrophy." Champaign, IL: Human Kinetics. Helms, E. R., Storey, A., Cross, M. R., Brown, S. R., Lenetsky, S., Ramsay, H., Dillen, C., & Zourdos, M. C. (2017). "RPE and velocity relationships for the back squat, bench press, and deadlift in powerlifters." Journal of Strength and Conditioning Research, 31(2), 292–297. - Link to the study Zourdos, M. C., Klemp, A., Dolan, C., Quiles, J. M., Schau, K. A., Jo, E., Helms, E. R., Esgro, B., Duncan, S., Garcia Merino, S., & Blanco, R. (2016). "Novel resistance training-specific rating of perceived exertion scale measuring repetitions in reserve." Journal of Strength and Conditioning Research, 30(1), 267–275. - Link to the study These resources provide detailed insights into the application of RPE in strength and hypertrophy training.