Feature Requests

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We've got Muscular Strain, now let's think about Muscle Recovery:
We all know based on research and papers, that HRV, which is one of the main component of Superset Recovery, is not a reliable metric to measure muscular recovery, it's perfect for running, swimming, cycling, but not so much for Strength based excercises. Let's try to find a way on how can Muscular Strain be used to help us plan workouts: There are studies which aim to understand the general time each muscle group takes to recover, obviously there's always variability based on the subjectivity of individuals, but that, as of now, can't be easily measured with just a watch and an app. So, why don't use data like in this link to quantify recovery in relation to muscular strain that we already have?: https://www.patreon.com/posts/recovery-rates-62989969?l=it Something like this is made by this app(fitbod): https://fitbod.zendesk.com/hc/en-us/articles/360006269014-Muscle-Recovery You can see there's a body heatmap(which i believe someone else already requested and so it's planned) and which muscle group is already recovered and at which percentage, probably based on generic recovery data like the one i linked before. Obviously one could even change the recover percentage with the slidebar because, by self evaluating, feels like that muscle group is more recovered than expected by the app. This would be completely unrelated to Recovery that we have right now, so it wouldn't screw with it and people which don't use strength builder wouldn't be bothered by it. It could use muscular strain data that the app already has, to calculate the impact on muscle groups and how much recovery is needed(cross checking with the standard recovery data). It would be a completely different tab where you would be welcomed by the body heatmap which refreshes with time and changes color reflecting, becoming less and less red the more it's recovered. Also, wourkouts could show a color, a percentage or an alert informing you that your excercises in your workout could be of muscle groups still recovering. In the end there should always be a big disclaimer that this should be used as a way to auto evaluate and not dictate when or not to excercise. I attach some quick edited images with the idea of how it could be implemented in the app UI.
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Fully support the increased HR & HRV data from Apple Watch Series 12 and Ultra 4
With the new Apple Watch Series 12 and Ultra 4, Apple has significantly increased the frequency of both background heart rate and HRV measurements. For heart rate, the watches now generate a background HR value approximately every 5 seconds. Apple’s 2026 Heart Rate Accuracy Study indicates that background HR data is published to HealthKit every 30 seconds. Looking at my own Health data, I noticed that these measurements can be grouped into a single HKQuantitySample spanning several minutes. For example, Apple Health may show one ~5-minute sedentary sample with an averaged HR, while “Show All Quantities” reveals around 10 individual HR measurements inside it, each with its own timestamp roughly 30 seconds apart. Would it be possible for Bevel to ensure it retrieves and uses these individual measurements — for example through HKQuantitySeriesSampleQuery / HKQuantitySeriesSampleQueryDescriptor where applicable — rather than potentially relying on the averaged value of the parent sample? The same question applies to HRV. Series 12 and Ultra 4 also provide substantially more frequent HRV data. Since Bevel can calculate RMSSD from Apple Watch beat-to-beat measurements available through HealthKit, does Bevel already take full advantage of this increased HRV/beat-to-beat data? If not, it would be great to expand support so Bevel can use the highest-resolution HR and HRV data that Apple makes available through HealthKit on these new watches. And if watchOS or HealthKit provides any way for third-party apps to access even more of the new 5-second background HR stream, it would be very interesting to explore that as well. One of the major improvements of the Series 12 and Ultra 4 is precisely this much higher cardiovascular sampling frequency. It would be great for Bevel to fully leverage that additional data for heart-rate trends, Stress, Recovery and other analyses, rather than effectively handling the new watches like previous generations.
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