# Perceived Exertion Converter MCP > Perceived Exertion Converter MCP lets you turn subjective effort into hard numbers. If you know how hard you're working on a scale of 1 to 20, this tool estimates your heart rate, training zones, and intensity levels. It's for people who want to track progress without always wearing a chest strap or watch. ## Overview - **Category:** health - **Price:** Free - **Tags:** rpe, heart-rate, training-zones, borg-scale, cr10-scale ## Description Training often feels like a guessing game. You know you're pushing hard, but knowing exactly where that effort lands on a physiological curve is much harder to track. This MCP bridges that gap by turning your internal sense of effort into concrete data points. Instead of just saying a workout felt "tough," you can get specific estimates on your heart rate and which training zone you actually hit. It helps you stay consistent by giving you a way to measure intensity even when you aren't wearing a heart rate monitor or a chest strap. You can use it to see if you're actually hitting your aerobic targets or if you're redlining too early during a session. Because it's hosted on Vinkius, you can plug it into your existing setup and have these calculations ready whenever you're logging a workout. It takes the guesswork out of your training plan by providing clear, actionable coaching advice based on how you feel in the moment. It helps you interpret your own body's signals with more precision, making it easier to adjust your pace, rest intervals, and overall volume. By converting subjective feelings into objective metrics, you can build a more accurate picture of your fitness progress. ## Tools ### convert_cr10_scale Converts a CR10 scale rating into physiological metrics and capacity percentages. ### get_training_guidance Provides coaching advice and intensity descriptions based on your reported effort. ### convert_borg_6_20_scale Turns a Borg 6-20 score into a heart rate and training zone estimate. ## Prompt Examples **Prompt:** ``` I feel like I'm at an RPE of 14 on the Borg scale and my max HR is 190. What is my estimated heart rate? ``` **Response:** ``` Based on a Borg 6-20 RPE of 14 and a max HR of 190, your estimated heart rate is approximately 153 BPM, which places you in the Aerobic training zone. ``` **Prompt:** ``` Convert an RPE of 7 on the CR10 scale with a max HR of 185. ``` **Response:** ``` For a CR10 RPE of 7 and a max HR of 185, your estimated heart rate is approximately 148 BPM (70% of max), placing you in the Threshold training zone. ``` **Prompt:** ``` What kind of training should I do at an RPE of 18 on the Borg scale? ``` **Response:** ``` An RPE of 18 represents a very high intensity, typically corresponding to the Anaerobic/Maximal zone. This effort is characterized by intense muscular effort and is usually sustainable only for short durations. ``` ## Capabilities ### Estimate heart rate from effort scores Turns your reported effort level into an estimated beats per minute count. ### Identify specific training zones Places your current effort into categories like Aerobic or Threshold. ### Calculate percentage of max capacity Shows what percentage of your maximum heart rate you are currently hitting. ### Get qualitative coaching advice Provides practical tips on how to adjust your intensity based on how you feel. ### Convert CR10 scale ratings to metrics Translates the 1-10 scale into physiological data. ### Map subjective effort to anaerobic limits Helps you see when you are pushing into high-intensity endurance limits. ## Use Cases ### Verifying aerobic zones A runner feels tired and asks their agent to check if their current effort level is keeping them in the aerobic zone. ### Swimming without a watch A swimmer wants to know their heart rate without a watch and asks for an estimate based on a maximum heart rate of 180. ### Adjusting weight intensity A weightlifter hits a plateau and asks for help, receiving advice on whether their intensity is too high for recovery. ### Analyzing hill climbs A cyclist wants to check if their hill climb was truly anaerobic and asks for a verification of their effort score. ## Benefits - Stop guessing your heart rate by using `convert_borg_6_20_scale` to get real-time estimates during your workouts. - Stay in your target training zones with `convert_cr10_scale` providing the exact percentage of your max capacity. - Get immediate coaching feedback from `get_training_guidance` to adjust your pace or rest periods on the fly. - Track progress over time by turning "felt" effort into a consistent set of physiological metrics. - Train effectively in environments where heart rate monitors aren't practical or allowed. - Quickly switch between different effort scales depending on the specific needs of your workout. ## How It Works The bottom line is you get objective data from subjective feelings. 1. Tell your AI client your current effort score and your maximum heart rate. 2. The MCP processes the math based on the specific scale you chose. 3. You get back your estimated heart rate, training zone, and coaching tips. ## Frequently Asked Questions **What does the Perceived Exertion Converter do?** It turns your subjective effort (RPE) into heart rate estimates and training zones. It's great for tracking intensity without a watch. **How do I use the Borg scale with this MCP?** Tell your agent your effort score (6-20) and your max heart rate. The system will then give you the estimated BPM and zone. **Does the Perceived Exertion Converter work for weightlifting?** Yes, it's highly effective for strength training where RPE is a standard way to measure intensity. **Can I get coaching tips with this MCP?** Yes, ask for descriptions of what your effort level means and get advice on how to adjust your training accordingly. **What is the difference between the two conversion tools?** One covers a wide range of effort, while the other provides more granular metrics for specific intensity levels. **Which apps support the Perceived Exertion Converter?** You can use this MCP with any compatible client like Claude, Cursor, Windsurf, or VS Code. Once you connect it through Vinkius, your agent can use the tools immediately. **Does the Perceived Exertion Converter store my health data?** No, this MCP doesn't save any of your personal information. It only processes the numbers you enter during your session to provide real-time calculations and coaching advice. **What inputs are required for the convert_borg_6_20_scale tool?** You need to provide your RPE score on the Borg scale and your maximum heart rate. The MCP then calculates your estimated heart rate and identifies your specific training zone.