Understanding Fitness Charts

This article provides an overview of all the charts available in the Fitness tab.

Cardio Load shows your graph and current value. It helps you understand whether your training is balanced, or whether you may be overtraining or detraining. This metric is based on your short-term load (ATL) compared with your long-term load.

You can toggle between 30D, 3M, 6M, and 1Y, or use the calendar icon in the bottom-right corner to set a custom date range.

The top-left number shows your short-term load, based on the past 7 days from the selected point on the graph. The number on the right shows your Cardio Status, which reflects your current training state and adaptability over time.

Cardio Status represents how your cardiovascular system is responding to recent training. It gives insight into your current training trajectory and recovery state.

There are seven possible statuses:

Calibrating

Bevel is still building your profile. Keep training for improved accuracy.

Detraining

You may be losing progress. Consider increasing your cardio training gradually.

Maintaining

Your training is steady and balanced.

Productive
Your training is supporting strong cardio gains.

Peaking

You are in peak condition and well recovered. This is an ideal state for racing or high performance.

Fatigued

You are training hard but may not be recovering well enough.

Overtraining

You may be at risk of injury or burnout. Consider reducing your cardio training load.

Cardio Load is based on your short-term load from the past 7 days and your long-term load from the past 6 weeks. It is calculated using Training Impulse (TRIMP), a method that estimates training stress based on heart rate and exercise duration.

The line, markers, and top-left number on the chart represent your short-term load (ATL). A higher short-term load means your recent training load is increasing. A lower short-term load means it is decreasing.

Short-term load ranges can generally be interpreted as:

• 0–25: Very light training

• 25–75: Moderate to hard training

• 75–125+: High fatigue, often during a training block or peak week

The shaded range on the chart represents your Optimal Load Range, showing where your ATL should ideally fall in relation to your long-term load (CTL). This reflects a balanced load ratio of approximately 0.8–1.3. The lighter shaded area on either side represents a margin of safety.

Cardio Status reflects where your short-term load currently sits and how your cardiovascular system is responding.

For the most accurate results, Bevel requires 6 weeks of activity data, including resting heart rate, and at least one workout within the past 2 weeks. Until these requirements are met, your Cardio Load status will appear as Calibrating.

The Heart Rate chart shows how your heart rate changed throughout the activity.

At the top of the chart, you’ll see:

• Avg: Your average heart rate during the activity

• Min: Your lowest recorded heart rate

• Max: Your highest recorded heart rate

The line changes color based on the Heart Rate Zone you were in at each point in the workout. Use the timeline along the bottom to see how your intensity changed as the activity progressed.

Heart Rate Zones show how the activity was distributed across your personalized heart rate ranges.

For each zone, you’ll see:

• Percentage: The percentage of the activity spent in that zone

• Duration: The total time spent in that zone

• BPM: The heart rate range assigned to that zone

Higher zones represent greater cardiovascular intensity. Your zone ranges are based on the Heart Rate Zone settings configured in Bevel.

Cardio Focus shows the breakdown of your training across three zones: Low Aerobic, High Aerobic, and Anaerobic. It helps you understand where your cardio effort is concentrated during exercise.

Bevel uses your VO₂ max and training intensity to estimate your thresholds, giving you a more accurate picture of training impact than time in zone alone.

Cardio Focus is divided into three main zones:

Low Aerobic

Easy, steady-state effort done at a conversational pace and lower heart rate. These workouts help build aerobic capacity, support fat metabolism, and aid recovery. Examples include long walks, easy jogs, and steady-state cycling.

High Aerobic

Sustained, higher-intensity effort that significantly raises heart rate. These workouts improve VO₂ max, aerobic power, and muscular endurance. Examples include threshold runs, tempo rides, and strong hill efforts.

Anaerobic

Short bursts of maximum effort that place high stress on the anaerobic system. These workouts improve speed, power, and lactate tolerance, but also require more recovery. Examples include HIIT, sprints, and VO₂ max intervals.

The Cardio Focus chart shows your zone distribution over the selected time period. You will see:

Cardio Focus

The zone where most of your aerobic effort is concentrated: Low Aerobic, High Aerobic, or Anaerobic.

Focus Percentage

The percentage of your training concentrated in that focus area relative to the others.

Cardio Points

A unitless value that represents your cardio training thresholds. Think of this like Strength Progression, but for cardio intensity instead of lifted weight. You can compare these points over time and across exercise types.

Use this chart to understand whether your training is well balanced or whether you may be relying too heavily on one zone, especially higher-intensity work that can increase strain.

Tailoring Cardio Focus to your goals

If your goal is to build endurance, increase your low aerobic volume.

If you are preparing for a race, add high aerobic and anaerobic work strategically.

If you are feeling worn down, shift toward more low aerobic sessions.

Heart Rate Recovery measures how quickly your heart rate returns toward baseline after exercise. It is a useful indicator of cardiovascular fitness and recovery. A faster HRR generally reflects stronger cardiovascular health and better recovery capacity, while a slower HRR may suggest fatigue, stress, or a need for better aerobic conditioning.

You can improve HRR through consistent aerobic training, good hydration, quality sleep, and stress management.

Bevel only tracks HRR for workouts where your heart rate reaches zone 4 or higher, since lower-intensity workouts do not provide enough cardiovascular load for accurate recovery analysis. You can filter HRR data by activity type or date range.

Bevel calculates Heart Rate Recovery by searching for the largest drop in your heart rate during your workout and up to two minutes after it ends.

For example, if your peak heart rate during a workout is 160, and two minutes later it drops to 130, your HRR is 30.

You can see HRR in your individual workout Activity Details when zone 4 is reached, and you can view HRR trends over time in the Fitness tab.

Workout intensity

Only workouts where your heart rate reaches zone 4 or above are used to calculate HRR.

Post-workout stillness

For the most accurate reading, remain seated or standing still for 2 minutes after your workout. Walking or moving around can affect the result.

Overall recovery

Sleep, hydration, nutrition, illness, and mental stress all influence how quickly your heart rate returns to baseline.

Aerobic fitness

As your aerobic capacity improves through consistent cardio training, your HRR will often improve as well. A stronger cardiovascular system typically recovers more quickly after effort.

Muscular Load represents the workload placed on your muscles during the activity. Bevel estimates this using the available workout data, such as the activity, exercises, sets, repetitions, weight, and effort.

The value in the top-left shows how much the activity added to your Muscular Load. The chart shows how your load changed from before the activity to after it.

The status underneath the value shows how your current Muscular Load compares with your recent training and ability to recover. Possible statuses include:

• Calibrating

• Detraining

• Maintaining

• Productive

• Peaking

• Overtraining

Muscle Breakdown shows how the activity’s total Muscular Load was distributed across your muscle groups.

At the top, you’ll see:

• The body area that received the most load

• The percentage of the activity’s total load attributed to that area

• A chart showing the distribution of load across body areas

Underneath, each muscle is listed with its percentage of the total load.

Tap See More to view all the muscles used during the activity.