Key Bevel Terms

A label that reflects your current physical condition and readiness. It helps contextualize your data by indicating whether you're Active, Sick, Injured, or On a Break, so your metrics and recommendations can better match how you're feeling.

A centralized view of your key health metrics, giving you a real-time snapshot of how your body is functioning. It includes Respiratory Rate (RR), Resting Heart Rate (RHR), Heart Rate Variability (HRV), Blood Oxygen (SpO₂), Temperature, and Sleep.

A chronological view of your day that brings all your activities together in one place. It includes events like workouts, sleep sessions, and nutrition.

The “+” button located in the bottom-right corner of your screen that gives you quick access to key actions. You can customize it to prioritize what matters most to you, making it faster and easier to log, track, or start activities.

A single number that reflects the quality and efficiency of your sleep. It's based on your Time Asleep, REM Sleep, Deep Sleep, Heart Rate Dip, Sleep Efficiency and Sleep Continuity. The higher your Sleep Score (out of 100%), the better your sleep quality; think of it as a quick snapshot of how well you’re actually resting.

The total time you spend asleep in a given sleep session.

The total amount of time you spent in bed. It includes both awake and asleep stages.

The percentage difference between your average heart rate during waking hours and your heart rate while you sleep. It reflects the reduction in heart rate that occurs when you transition from being awake to entering the restorative state of sleep. In simple terms, it measures how efficiently your heart functions during rest.

The Time Asleep over the Time in Bed.

A higher Sleep Continuity means less interruptions during your sleep.

The difference between your Time in Bed and the first sleep stage time.

A personalized metric that tells you how much sleep your body requires each day. It’s calculated based on your sleep goal, recent activity, sleep debt, and how efficiently you’ve been sleeping, so it’s not just a generic number. Sleep Needed helps you figure out exactly how much rest you need to recover and feel your best.

You accrue Sleep Debt when your Sleep Bank is negative. Just like financial debt, Sleep Debt can pile up and lead to problems - messing with your focus, mood, and health until you “repay” it with enough quality sleep.

The difference between your Time Asleep vs. Sleep Needed. A positive Sleep Bank indicates that you have a surplus, and a negative indicates Sleep Debt.

Your personal preference of how much sleep you want to sleep each night. You can set this manually under Settings > Customization > Goals, or calculate an automatic Sleep Goal based on your historical data.

A number from 1% to 100% based on your body’s key health signals. It’s calculated using your resting heart rate (RHR), heart rate variability (HRV), respiratory rate, SpO2, and wrist temperature. To improve your Recovery Score, focus on improving sleep quality, and getting the right amount of rest. The higher your score, the more ready your body is for action; a lower score means you should take it easy.

The variation in time between your heartbeats shows how well your body handles stress and recovery. Based on your Settings, this will either be calculated using the RMSSD or SDNN method.

By default, Bevel refers to Resting HRV as HRV during your sleep to reduce noise. You can change this in Settings under Settings > Customization > Calculations.

The number of times your heart beats per minute when you’re totally at rest. Bevel tracks this during sleep (not using Apple Health’s RHR) to avoid outside influences like stress or movement. A lower RHR usually means your heart is strong and efficient; tracking it helps you spot trends in your fitness and health.

The number of breaths you take per minute, tracked while you sleep. Bevel uses your Apple Watch’s sensors to measure RR, giving you a snapshot of how efficiently your body is breathing at rest. RR is a key player in your Sleep Score and Recovery Score, since changes can reveal sleep quality, stress, or even environmental effects. For most adults, a normal RR during sleep is 12–20 breaths per minute, but what really matters is how your own numbers trend over time.

How much oxygen your red blood cells are carrying - 100% means you’re fully loaded, while anything below 95% could be a red flag. Bevel uses your Apple Watch to track this, helping you spot trends related to fitness, altitude, or even illness. It’s a quick way to check if your body’s getting the oxygen it needs, whether you’re working out, recovering, or just living your life.

Skin temperature, tracked by your device while you sleep. It’s not your core body temperature, but the temperature of your skin on your wrist, which is useful for spotting changes in your health, stress, or sleep quality. Bevel looks for shifts from your personal baseline, so you can catch when something’s off, like stress spikes or restless nights.

A field in Apple Health that tracks your body temperature. It is not tracked by an Apple Watch and typically requires a separate device such as the Oura Ring to track. Body Temperature can be used as a substitute for Wrist Temperature. To change this, go to Bevel Settings > Customization > Calculations.

A number that shows how much physical effort you’ve put in each day. It combines both your active strain (from workouts) and passive strain (from daily movement and heart rate outside workouts). The higher your Strain Score, the more intense your day has been - 100% usually means a high-intensity workout. If your score is high without a workout, it could mean stress, poor recovery, or even illness is pushing your body. Your Target Strain is a daily recommendation that helps you hit the sweet spot between pushing hard and knowing when to rest.

How much time you spent exercising during the day.

Heart rate during the day when not exercising or sleeping.

The number of calories you burn through movement and exercise, not including your Resting Energy.

The sum of Active Energy and Resting Energy.

The calories your body burns at rest (digestion, cognition, etc.)

The number of steps recorded by your device.

Strain accumulated from doing an exercise.

Strain accumulated from doing normal activities throughout the day such as walking, working, or doing chores. It does not include Strain from doing an exercise.

The range you should strive to hit based on your typical Strain level and recent Recovery scores.

A score that reflects your level of mental stress throughout the day, based on physiological signals like heart rate and heart rate variability (HRV), while accounting for movement. Your stress is measured on a scale from 0 to 100, where lower values indicate a more relaxed state and higher values suggest increased stress and a greater need for recovery. By mapping stress across activities like sleep, workouts, and daily routines, it helps you understand what drives or reduces your stress so you can better manage it over time.

A score that tracks your daily energy by combining recovery, sleep, strain, and stress. It shows how your energy changes throughout the day, not just after sleep. High stress drains it, good sleep and rest recharge it. Your score carries over day to day, so it’s cumulative. It’s a quick way to see if you’re running on empty or fully charged.

A daily score from 1 to 100 that reflects the overall quality and balance of your eating patterns. It evaluates how your food choices contribute to long-term health by considering both what you eat and, when available, how your body responds. Your score updates throughout the day as you log meals, helping you understand which foods support your health and which may have a negative impact.

The difference between your Energy Consumed vs. Total Energy burned.

The balance between Protein, Carbs, and Fat.

Glucose levels 30 minutes after waking up or the time before your first meal.

The average of all your glucose samples throughout the day.

The variability across all of your glucose samples.

The individual food categories that make up your Nutrition Score, based on how different foods impact long-term health. These contributors track what you eat throughout the day and show how each choice affects your score. Positive contributors add points when you reach healthy targets, while negative contributors subtract points when you exceed recommended limits. Together, they give you a clear view of how your daily eating patterns support or impact your overall health.

Measures the impact of food on your blood glucose. It looks at things like Peak (the highest point in your glucose levels following a meal), Exposure (the area under the glucose curve), and Delta (the difference between your initial and ending glucose).

Key nutrients you can set goals for to support specific health and performance outcomes. By aiming to reach these targets each day, you can ensure your body is getting the nutrients it needs to function, recover, and perform at its best.

Nutrients you can set limits on to help manage intake and avoid exceeding recommended levels. Staying within these limits supports long-term health and helps you reduce nutrients that may have negative effects when consumed in excess.

A metric that reflects the balance between your short-term and long-term training load, helping you understand whether your body is being appropriately challenged, overworked, or undertrained. By comparing your recent activity to your longer-term training history, Cardio Load shows how your body is adapting to exercise. It helps you stay in the optimal range where you can build fitness and performance while avoiding fatigue, burnout, or loss of progress.

Cardio Status in Bevel is a snapshot of how your heart and body are handling your recent training. It tells you if you’re slacking (Detraining), holding steady (Maintaining), making gains (Productive), running on empty (Fatigued), at your peak (Peaking), or pushing too hard (Overtraining). This status is based on your Cardio Load trends, so you know when to push, when to chill, and when you’re in the sweet spot for progress. If you stop working out for a long period of time or you are still in the 6-week calibration period, you will see the status Calibrating.

Show how well you’re sticking to your ideal daily workout intensity. It tracks whether you’re training within, above, or below your personalized Target Strain - the sweet spot for making gains without burning out. Your Target Strain adapts daily based on your recent workouts and recovery, so you’re always getting a nudge in the right direction. Consistently hitting your Target Strain means you’re training smart: pushing hard enough to improve, but not so hard you risk injury or stall your progress.

Shows which heart rate zones you’ve been training in, so you can balance your workouts for better results. It breaks down your training into low aerobic, high aerobic, and anaerobic zones, based on your VO₂ max and workout intensity.

Shows how quickly your heart rate drops after tough exercise - a key sign of your fitness and recovery. Bevel measures HRR as the difference between your peak heart rate (zone 4 or higher) and your heart rate two minutes after you stop working out or during the workout . A faster drop means your heart and nervous system are in good shape; a slower drop can mean you’re tired, stressed, or need more recovery. You’ll see your HRR in workout details if you hit zone 4, and you can track trends over time to see if your fitness is improving or if you need to tweak your routine.

Shows your exercise progression over time. For example, you can track how much volume or reps you've been doing for Bicep Curls.

The number times you've performed a workout over the last 30 days

How much weight you've lifted for each muscle group over the last 30 days.

The Strain you put on your muscles. It's calculated using data from your strength workouts such as the exercise, sets, reps, and perceived exertion.

If you use the Bevel app on your watch to track strength training, it will use the watch accelerometer to track Muscular Strain using the Velocity Based Training method.

Heart rate zones are heart-rate ranges that map to exercise intensity. They’re useful because they turn raw BPM into training guidance: lower zones are typically recovery/easy aerobic work, middle zones are steady aerobic effort, and higher zones are threshold/anaerobic work. Bevel’s public explainer describes them as ranges tied to different exercise intensities and notes that zones help monitor cardiovascular load and workout effectiveness.

In Settings, you can choose between the following HR Zone Settings: Max HR, HR Reserve, Lactate Threshold, or Manual.

The maximum amount of weight you can lift for a single repetition of an exercise with proper form. It represents your peak strength for that movement and is often used to guide training intensity, track progress, and personalize workout recommendations.

A feature that keeps your workout data synced in real time between your phone and Apple Watch. As you log sets, reps, or weights on one device, it instantly updates on the other, allowing you to track and adjust your workout seamlessly without interruption.

A tool that helps you determine how to load a barbell to reach a specific weight. Based on your target weight and the bar you’re using, it calculates the combination of plates needed on each side, making it quick and easy to set up and calculate your lifts accurately.

The maximum rate at which your body can take in, transport, and use oxygen during intense exercise. Bevel uses the VO2 Max values from Apple Health. It does not calculate its own VO2 Max data.

The rolling 60-day average of your Resting HRV. While your daily resting HRV may fluctuate, the baseline smooths out these variations to reveal your true HRV trend. It's located under the Biology tab.

The rolling 60-day average of your resting heart rate (RHR). While your daily RHR may fluctuate, the baseline smooths out these variations to reveal your true RHR trend. It's located under the Biology tab.

Your weight data from Apple Health. You can also add weight directly from the Weight Trend in Biology.

A rolling average of your Weight. While your daily weight may fluctuate, the Weight Trend shows your true weight trend. It's located under the Biology tab.

Your body weight minus fat mass. It includes muscle, bones, organs, body water and other non-fat tissues. It's pulled from Apple Health and is located under the Biology tab.

The proportion of fat to your total weight. It's pulled from Apple Health and is located under the Biology tab.