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Resources

Learn & explore

Tips, guides and insights to get the most out of your Circular Ring.

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The Training zone, EPOC and recovery for weight loss: science-backed theory
Activity

The Training zone, EPOC and recovery for weight loss: science-backed theory

December 31, 2019
2 min read
Understanding VO2 max: why is it useful?
Activity

Understanding VO2 max: why is it useful?

July 19, 2022
2 min read
Circular’s calories burned
Activity

Circular’s calories burned

November 25, 2022
1 min read
Circular’s walking equivalency & steps counter
Activity

Circular’s walking equivalency & steps counter

November 25, 2022
1 min read
How Circular tracks your Active minutes, Cardio points, Activity Volume, and Recovery
Activity

How Circular tracks your Active minutes, Cardio points, Activity Volume, and Recovery

November 25, 2022
1 min read
How Circular tracks your Activity intensity
Activity

How Circular tracks your Activity intensity

January 12, 2020
1 min read
Why it is important to know your Max Heart Rate
Activity

Why it is important to know your Max Heart Rate

December 17, 2019
1 min read
What is blood oxygenation level or blood saturation (SpO2): Uses and More
Activity

What is blood oxygenation level or blood saturation (SpO2): Uses and More

August 30, 2019
3 min read
How Circular tracks your Resting Heart Rate (RHR) and how to use it?
Activity

How Circular tracks your Resting Heart Rate (RHR) and how to use it?

August 30, 2019
3 min read
Understanding the Circular® Energy score: are you ready or not for the day?
Activity

Understanding the Circular® Energy score: are you ready or not for the day?

January 20, 2020
3 min read
What is the Circular® Wake up score and how it is calculated
Sleep

What is the Circular® Wake up score and how it is calculated

August 3, 2023
1 min read
What is the Circular® Sleep quality score and how it is calculated
Sleep

What is the Circular® Sleep quality score and how it is calculated

August 20, 2023
3 min read
How to hack your body to get rid of stress and anxiety

How to hack your body to get rid of stress and anxiety

August 30, 2019
3 min read
Tips to increase your Deep sleep

Tips to increase your Deep sleep

March 16, 2020
2 min read
Tips to increase your REM sleep

Tips to increase your REM sleep

January 20, 2020
2 min read
How to sleep better and fall asleep faster

How to sleep better and fall asleep faster

January 12, 2020
4 min read
Sleep better: external factors influencing sleep quality

Sleep better: external factors influencing sleep quality

January 1, 2020
5 min read
How to adapt to naps

How to adapt to naps

December 19, 2019
2 min read
How to have lucid dreams

How to have lucid dreams

December 19, 2019
3 min read
What is a lucid dream

What is a lucid dream

December 5, 2019
1 min read
Sleep disorders classification

Sleep disorders classification

November 26, 2019
5 min read
Understanding polyphasic sleep schedules

Understanding polyphasic sleep schedules

November 18, 2019
4 min read
The benefits and risks of polyphasic sleep

The benefits and risks of polyphasic sleep

November 13, 2019
2 min read
Falling asleep naturally without sleeping pills. Medication taking and risks.

Falling asleep naturally without sleeping pills. Medication taking and risks.

October 30, 2019
3 min read
What’s the Circadian rhythm

What’s the Circadian rhythm

November 7, 2019
2 min read
Circular® smart snooze: Embrace Circular's Smart Snooze Feature for Energized Mornings

Circular® smart snooze: Embrace Circular's Smart Snooze Feature for Energized Mornings

August 1, 2023
1 min read
Circular® smart alarm clock: How to wake up with motivation and energy while getting rid of sleep inertia

Circular® smart alarm clock: How to wake up with motivation and energy while getting rid of sleep inertia

July 21, 2023
1 min read
Silent Alarm Clock by Circular® : The perfect smart & silent alarm clock

Silent Alarm Clock by Circular® : The perfect smart & silent alarm clock

May 25, 2022
2 min read
Get rid of sleep inertia forever

Get rid of sleep inertia forever

October 2, 2019
2 min read
Recover when you don't get enough sleep (in a healthy way)

Recover when you don't get enough sleep (in a healthy way)

September 24, 2019
2 min read
How to lower your time to fall asleep?

How to lower your time to fall asleep?

September 24, 2019
4 min read
How much sleep should I get? Sleep demystified. Basics n°5 about sleep

How much sleep should I get? Sleep demystified. Basics n°5 about sleep

August 30, 2019
2 min read
How to use Heart Rate Variability (HRV)

How to use Heart Rate Variability (HRV)

August 23, 2019
5 min read
What increases and decreases Heart Rate Variability (HRV)?

What increases and decreases Heart Rate Variability (HRV)?

August 23, 2019
3 min read
The architecture of your sleep. Basics n°4 about sleep

The architecture of your sleep. Basics n°4 about sleep

August 23, 2019
3 min read
The sleep stages that compose your sleep cycle. Basics n°3 about sleep

The sleep stages that compose your sleep cycle. Basics n°3 about sleep

August 23, 2019
4 min read
Understanding Heart Rate Variability (HRV)

Understanding Heart Rate Variability (HRV)

August 11, 2019
4 min read
Continuous Heart Rate monitor

Continuous Heart Rate monitor

August 11, 2019
3 min read
Your personal sleep cycle. Basics n°2 about sleep

Your personal sleep cycle. Basics n°2 about sleep

August 11, 2019
1 min read
Better sleep, the key to your problems. Basics n°1 about sleep

Better sleep, the key to your problems. Basics n°1 about sleep

August 10, 2019
2 min read
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11 min read

How Circular Ring 2 Measures Blood Pressure Without a Cuff

September 2, 2026
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9 min read

Circular Ring 2 Release Notes (Aug 2026): The Biggest Update Ever, 100% Bluetooth Stability, and a New Foundation for Blood Pressure and Glucose Estimate

August 26, 2026
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11 min read

How Circular Ring 2 Measures Blood Pressure Without a Cuff

September 2, 2026

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Expert
3 min

Bio-hacking Best Practices from Coach Siim Land

February 25, 2020
News
1 min

Kickstarter Campaign - Update #2

February 18, 2020
News
1 min

Kickstarter campaign - Update #1

February 16, 2020
News
1 min

Circular is LIVE on Kickstarter

January 28, 2020
News
1 min read

How to change the interchangeable shell of my Circular Ring

January 26, 2020
News
2 min

Circular update: Exclusive content, CES, Kickstarter ...

January 20, 2020
Activity
3 min read

Smart Ring for Women's Health: Menopause, Cycle Tracking, and More

August 11, 2026
Activity
6 min read

Smart Ring vs Chest Strap: ECG Accuracy Compared

June 22, 2026
News
3 min read

Stress Levels Tracking: Your Path to Inner Peace

October 18, 2023
News
3 min read

Introducing Kira+: The Most Sophisticated Personalized Wellness AI Powered by Circular

July 20, 2023
Expert
5 min read

Leaderboard Winner Interview (Audrey C.) - October 2022

December 13, 2022
Activity
1 min read

How Circular tracks your Active minutes, Cardio points, Activity Volume, and Recovery

November 25, 2022
Sleep
7 min read

What Is a Normal Sleeping Heart Rate, and How Do You Measure It?

June 26, 2026
11 min read

Can a Smart Ring Detect Sleep Apnea? What the Science Says

June 22, 2026
Sleep
2 min read

Beat Sleep Inertia and Wake Up Alert: How Circular's Smart Alarm and Wake-Up Score Revolutionize Mornings

March 8, 2024
News
3 min read

Stress Levels Tracking: Your Path to Inner Peace

October 18, 2023
Sleep
3 min read

What is the Circular® Sleep quality score and how it is calculated

August 20, 2023
Sleep
1 min read

What is the Circular® Wake up score and how it is calculated

August 3, 2023
News
11 min read

How Circular Ring 2 Measures Blood Pressure Without a Cuff

September 2, 2026
News
9 min read

Circular Ring 2 Release Notes (Aug 2026): The Biggest Update Ever, 100% Bluetooth Stability, and a New Foundation for Blood Pressure and Glucose Estimate

August 26, 2026
News
11 min read

Apple Watch vs Circular Ring 2: A Side-by-Side Comparison After Wearing Both

August 10, 2026
News
6 min read

4 Best Non-Watch Fitness Trackers in 2026

June 5, 2026
News
6 min read

Ultrahuman Ring Pro vs Circular Ring 2: Which is worth buying?

May 20, 2026
News
5 min read

14 Best Wellness Gifts for Mom This Mother's Day

May 8, 2026

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