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Comparing Sleep Monitoring Devices: Oura, Biostrap, and WHOOP
Comparing Sleep Monitoring Devices: Oura, Biostrap, and WHOOP

Comparing Sleep Monitoring Devices: Oura, Biostrap, and WHOOP

Sleep is critical. I’ll repeat and expand: not only is sleep absolutely critical, but proper sleep hygiene is also key for preserving and protecting our health. Sleep and the ramifications of improper sleep is something I am very interested in. Last year, I wrote a four-part series on sleep, which totals over 10,000 words:

Part 1
Part 2
Part 3
Part 4

I’m interested in sleep for my own health and conducted several projects evaluating my own sleep, including these three:

  • Fasting: I measured the effects fasting had on my sleep, including during fasts and a 15-month retrospective analysis.
  • Alcohol: I experimented with sleep quality after low, moderate, high, and extreme doses of alcohol and the consumption of hydrogen rich water, using a two-participant, double-blind placebo controlled crossover design,  which included myself and my wife.
  • Sleep Quality Comparison: This was a 30-day analysis of before and after using the OOLER (advanced sleep system involving temperature regulation) in a two-participant, open-label, controlled design.
  •  

    I have also advocated to explore the effects of hydrogen water on sleep and acute sleep deprivation with various research teams. The results of our most recent clinical trial suggested that our hydrogen tablets were as effective as 100mg of caffeine at raising attention after 24 hours of sleep deprivation in young, healthy participants. You can read our article here.

    Additionally, a research team from a major U.S. institution is conducting extensive preclinical work on the effects of hydrogen water on sleep quality and recovery from acute stressors that impact sleep in mice. In addition, two other research teams are planning to incorporate our hydrogen tablets in clinical research assessing sleep quality. Sleep quality could very well emerge as a top research interest for hydrogen water in the coming years, based on the early data. 

    Comparing Sleep Monitoring Devices

    Due to my interest in sleep and hydrogen water, it only seemed logical to evaluate the three most commonly utilized “wearables” within the “biohacking” community, with a strong emphasis on sleep measurements.

    Three main points of the devices include the following::
    • None of the devices are as accurate as polysomnography. All of them utilize similar technologies but the algorithms differ.
    • Although none of the devices are accurate enough to compare sleep quality across a population, they are all likely accurate enough to observe changes within an individual. For instance, the devices will decipher your sleep patterns and determine with reasonable accuracy whether your sleep is improving or getting worse.
    • Oura and WHOOP have third-party research published comparing their data recording to polysomnography, while Biostrap does not:

    Oura

    WHOOP

    As one publication notes, although the Biostrap does not appear to have any of its data validated, the company at least features a “research opportunities” section on their website, suggesting they are open to the concept:

    Come back next week for my analysis on the winning devices vs. the full power sleep tracker tech found in Serta-Simmons BeautyRest, which is validated to 90% accuracy against polysomnography in 90% of people.

    Drawbacks and Advantages of Oura, Biostrap, and WHOOP

    Drawbacks

    Oura always penalizes me for going to bed too late. I have always been a “night owl,” but it has not adapted to my sleep habits.

    Biostrap does not differentiate between deep and REM sleep, combining the two totals.

    Also, Biostrap does not measure respiratory ratio.

    WHOOP does not give an actual resting HR, only providing a graph which you can use to estimate it.

    Advantages

    Oura is the only device that measures nocturnal body temperature; however, unfortunately, it does not graph its changes throughout the night.

    WHOOP has adapted to my sleep schedule and recommends a time to go bed and an optimal sleep duration using my typical schedule as a frame of reference; however sometimes their advice is quite stupid and nonsensical. Every night, the device gives me a “minimum viable sleep” suggestion that has me going to bed later than I have any night within the time I started wearing it, usually, 1:30 am -2 am for minimum viable sleep. Once, it was even several hours later than the latest I typically get to sleep. I tend to fall asleep between 11:30 pm -12:30 am every night, but one night it suggested I go to bed at 2:25 am and get to bed by at least 4:10 am!

    BioStrap has no observed positives compared to the other two devices.

    Observational Deficiencies of Oura, Biostrap, and WHOOP

    Biostrap is the only device that failed to register my sleep for an entire night within the 30-day window. The strap was fully charged.

    WHOOP does not record both segments of my sleep when they are significantly “fractured.”

    Oura does not have this issue with my data, but my wife has had the following two significant issues with OURA:

    • She tends to fall asleep on the couch most days as I unwind either working/writing or watching TV. She then moves to the bed, and on some nights, she comes back to the couch. OURA seems to register one or two of her sleep segments as “rest,” and only the largest chunk as “sleep.” As such, her sleep numbers are significantly impaired on most days. Fortunately, they are consistently impaired, as this is a daily occurrence, not occurring at random and low frequency.
    • OURA does not measure deep sleep for my wife. On many days, the device registers less than 30 minutes of deep sleep for her. However, I can attest that she sleeps very deeply. Typically, I need to both shake her, while raising my voice to a yell, to wake her up from the couch to come to bed. On the other hand, I tend to wake up numerous times throughout the night, even from noises such as our cat jumping from the bed to the carpet and the almost imperceptible “thud” which accompanies it. Both Oura and WHOOP record me as sleeping “deeply” a large percentage of the night, but Oura rarely records my wife entering deep sleep.
    Readiness & Sleep Score

    Observationally and subjectively, for me, I found Oura to have the most accurate “sleep scores,” although I do believe they trend too low as I am punished for being a “night owl.” WHOOP scored my sleep as “very good” on nights I know I was compromised, such as when I was very intoxicated or undertaking a long water fast.

    For readiness, Oura seems to be the most accurate for me. In contrast, WHOOP scores my readiness far too low on many days, and Biostrap lacks consistency.

    Sleep Score Data

    *Sleep is scored for the night AFTER the activity of the day, i.e., day 1, then night 1.
    Calories refer to ACTIVE calories burned on top of resting caloric burn.

    HRV refers to heart rate variability (a measure of variation in time between each heartbeat).

    RHR refers to resting heart rate.

    *RHR does not show in WHOOP. Bpms are estimates based on the graph here.

    RR refers to inter-beat intervals. Biostrap does not score this, thus it is omitted in the table below.

    REM DEEP: Combines Deep and REM sleep

    Body temp refers to deviations from baseline body temperature.

     

    DAY

    OURA

    BIOSTRAP

    WHOOP

    Comments

    1

    CALORIES 1198
    SLEEP

    7hr 33 min total sleep

    Sleep score: 80
    RR: 15.8 ms

    Body temp: -0.4°C

    REM: 1hr 51min

    Deep: 1hr 32min

    HRV: 60 ms

    RHR: 54 bpm

     

    CALORIES 946
    SLEEP

    7 hr 23 min total sleep

    92 “sleep score”

    RR: does not score

    REM
    DEEP: combines Deep and REM:

    2hr 22min

    HRV: 65 ms

    RHR: 54 bpm

     

    CALORIES 1732
    SLEEP:

    7 hr 34 min total sleep

    95% efficiency
    RR: 15.9 ms
    REM: 2hr 56 min
    Deep: 1hr 36 min
    HRV: 89 ms
    RHR: *does not show, based on graph est. 55 bpm

    Walked 9km this day as an intentional walk, on top of other walking around during cooking, errands, general movement.

    2

    CALORIES 398
    SLEEP

    6 hr 51 total sleep

    Sleep score: 77
    RR: 14.2 ms

    Body temp: -0.5°C

    REM: 1hr 28 min

    Deep: 1hr 43 min

    HRV: 79 ms

    RHR: 45 bpm

     

     

    CALORIES 188
    SLEEP

    7hr 18 total sleep

    92 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    2 hr 11 min

    HRV: 71 ms

    RHR: 47 bpm

     

    CALORIES: 3366
    SLEEP

    7 hr 21 min total sleep

    91% efficiency
    RR: 14.2 ms
    REM: 2hr 18 min
    Deep: 2hr 11min
    HRV: 85 ms
    RHR: *does not show, based on graph est. 45 bpm

    I spent the entire day driving. WHOOP recorded me as doing an intensive workout, with an elevated HR during a period I was on the highway.

    3

    CALORIES 1290
    SLEEP

    5 hr 23min total sleep

    Sleep score: 64
    RR: 13.1 ms

    Body temp: -0.3°C

    REM: 1hr 34min

    Deep; 1hr 35 min

    HRV: 70 ms

    RHR: 49 bpm

     

    CALORIES 728
    SLEEP

    5hr 54min total sleep

    61 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    2hr 12 min

    HRV: 64 ms

    RHR: 50 bpm

     

    CALORIES 2979
    SLEEP

    1hr 50min total sleep

    95% efficiency
    RR: 14.7 ms
    REM: 19min
    Deep: 32min
    HRV: 66 ms
    RHR: *does not show, based on graph est. 50 bpm

    Fasting day 2. Fractured sleep due to my cat being sick.

    WHOOP clearly cut my sleep off after I woke up to take care of my cat. The majority of sleep was after that.

    4

    CALORIES 792
    SLEEP

    6hr 54min total sleep

    Sleep score: 83
    RR: 14.5 ms

    Body temp: -0.3°C

    REM: 1hr 15min

    Deep: 3hr 3min

    HRV: 77 ms

    RHR: 48 bpm

     

    CALORIES 882
    SLEEP

    7hr 7min total sleep

    99 “Sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    2hr 29min

    HRV: 66 ms

    RHR: 48 bpm

     

    CALORIES 3161
    SLEEP

    6hr 51min total sleep

    95% efficiency
    RR: 14.3 ms
    REM: 2hr 30min
    Deep: 1hr 59min
    HRV: 85 ms
    RHR: *does not show, based on graph est. 41 bpm

    Broke my water only fast at hour 68 of no calories, semi active day. My sleep was “OK,” but definitely not a “99 sleep score.”

    5

    CALORIES 1215
    SLEEP

    6hr 22min total sleep

    Sleep score: 73
    RR: 14.4 ms

    Body temp: +0.5°C

    REM: 59min

    Deep: 1hr 39min

    HRV: 71 ms

    RHR: 52 bpm

     

    CALORIES 1085
    SLEEP

    6hr 02min total sleep

    72 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    1hr 30min

    HRV: 91 ms

    RHR: 52 bpm

     

    CALORIES 3758
    SLEEP

    7hr 03min total sleep

    97% efficiency
    RR: 14.4 ms
    REM: 3hr 06
    Deep: 1hr 17
    HRV: 100 ms
    RHR: *does not show, based on graph est. 46 bpm

    Two workouts. Impaired sleep due to 1.5 bottles of red wine.

    WHOOP seems to think I had the best sleep yet, when I clearly did not and was intoxicated.

     

    6

    CALORIES 726
    SLEEP

    7hr 47min total sleep

    Sleep score: 81
    RR: 14.1 ms

    Body temp: -0.1°C

    REM: 1hr 37min

    Deep: 2hr 43min

    HRV: 85 ms

    RHR: 47 bpm

     

    CALORIES 518
    SLEEP

    8hr 08 total sleep

    92 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    2hr 11min

    HRV: 87 ms

    RHR: 46 bpm

     

    CALORIES 1928
    SLEEP

    8hr 14min total sleep

    95% efficiency
    RR: 14.1 ms
    REM: 2hr 35min
    Deep: 2hr 15min
    HRV: 85 ms
    RHR: *does not show, based on graph est. 46 bpm

    Rest day, no workouts, just normal walking and movement. Good sleep; felt quite restored. WHOOP seemed to think I had a better sleep the night before when intoxicated.

    7

    CALORIES 1363
    SLEEP

    7hr 12min total sleep

    Sleep score: 78
    RR: 14.9ms

    Body temp: -0.8°C

    REM: 1hr 10min

    Deep: 2hr 21min

    HRV: 101 ms

    RHR: 46 bpm

     

    CALORIES 824
    SLEEP

    7hr 08min total sleep

    81 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    1hr 44min

    HRV: 95 ms

    RHR: 45 bpm

     

    CALORIES 2681
    SLEEP

    7hr 42 total sleep

    94% efficiency
    RR: 14.8ms
    REM: 3hr 19min
    Deep: 2hr 04min
    HRV: 97
    RHR: *does not show, based on graph est. 42 bpm

    This was my “treat day.” Worked out, went for a leisurely hike/walk, dinner was pizza (no dessert). I find sleep is always impaired after overeating/poor eating.

    8

    CALORIES 1927
    SLEEP

    8hr 10min total sleep

    Sleep score: 80
    RR: 16.2 ms

    Body temp: +0.9°C

    REM: 1hr 56min

    Deep: 44min

    HRV: 34 ms

    RHR: 57 bpm

     

    CALORIES 1253
    SLEEP

    8hr 38min total sleep

    67 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    1hr 34min

    HRV: 56 ms

    RHR: 57 bpm

     

    CALORIES 5406
    SLEEP

    3hr 32min total sleep

    94% efficiency
    RR: 15 ms
    REM: 1hr 35
    Deep: 36min
    HRV: 87 ms
    RHR: *does not show, based on graph est. 48 bpm

    Two-hour hike. Sleep greatly impaired by consumption of 2.5 bottles of red wine, and cake (my birthday celebrations).

    WHOOP only scores part of your sleep if fragmented. I got up at 4am as I was hot and needed water; it only recorded my sleep from 4-8am as sleep, not the period up until 4am.

    9

    CALORIES 607
    SLEEP

    7hr 5 total sleep

    Sleep score: 75
    RR: 13.4 ms

    Body temp: +0.1°C

    REM: 1hr 2min

    Deep: 1hr 31min

    HRV: 101 ms

    RHR: 44 bpm

     

    CALORIES 408
    SLEEP

    7hr 24 total sleep

    95 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    2hr 38min

    HRV: 90 ms

    RHR: 43 bpm

     

    CALORIES 1928
    SLEEP

    7hr 33min total sleep

    90% efficiency
    RR: 13.5 ms
    REM: 2hr 51min
    Deep: 1hr 54min
    HRV: 128 ms
    RHR: *does not show, based on graph est. 40 bpm

    Recovery day; fasted and did not workout or go for a long walk, just normal movement.

    10

    CALORIES 717
    SLEEP

    7hr 34min total sleep

    Sleep score: 80
    RR: 14.6 ms

    Body temp: +0.0°C

    REM: 57min

    Deep: 2hr 6min

    HRV: 92 ms

    RHR: 44 bpm

     

    CALORIES 420
    SLEEP

    7hr 15min total sleep

    92 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    2hr 11min

    HRV: 82 ms

    RHR: 47 bpm

     

    CALORIES 2476
    SLEEP

    7hr 43 total sleep

    93% efficiency
    RR: 14.9 ms
    REM: 3hr 09min
    Deep: 1hr 37min
    HRV:116
    RHR: *does not show, based on graph est. 45 bpm

    Light day, just a bag workout, no long walk.

    Felt a bit lethargic/hard to get out of bed

    11

    CALORIES 1221
    SLEEP

    6hr 37min total sleep

    Sleep score: 77
    RR: 14.6 ms

    Body temp: -0.3°C

    REM: 1hr 31min

    Deep: 1hr 40min

    HRV: 67 ms

    RHR: 49 bpm

     

    CALORIES 998
    SLEEP

    6hr 40min total sleep

    76 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    1hr 42min

    HRV: 65 ms

    RHR: 48 bpm

     

    CALORIES 2541
    SLEEP

    6hr 53min total sleep

    91% efficiency
    RR: 14.6 ms
    REM: 3hr 07min
    Deep: 1hr 45min
    HRV: 72 ms
    RHR: *does not show, based on graph est. 45 bpm

    Workout + nature walk. Fasted that day/no calories. Had trouble sleeping.

    12

    CALORIES 1276
    SLEEP

    8hr 10min total sleep

    Sleep score: 86
    RR: 15.5 ms

    Body temp: -0.0°C

    REM: 1hr 13min

    Deep; 1hr 56min

    HRV: 50 ms

    RHR: 52 bpm

     

    CALORIES 681
    SLEEP

    8hr 04 total sleep

    95 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    3hr

    HRV: 58 ms

    RHR: 53 bpm

     

    CALORIES 2769
    SLEEP

    8hr 30 total sleep

    94% efficiency
    RR: 15.7 ms
    REM: 2hr 51min
    Deep: 2hr 16min
    HRV: 56 ms
    RHR: *does not show, based on graph est. 48 bpm

    All 3 wearables, despite differing sleep scores, had me at low recovery and were telling me to go easy - I was quite lethargic, tired and sluggish.

    Workout + nature walk again this day.

    13

    CALORIES 762
    SLEEP

    6hr 54min total sleep

    Sleep score: 76
    RR: 14.5 ms

    Body temp: -1.0°C

    REM: 1hr 23min

    Deep: 2hr 14min

    HRV: 76 ms

    RHR: 53 bpm

     

    CALORIES 421
    SLEEP

    6hr 56 total sleep

    94 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    2hr 27min

    HRV: 81 ms

    RHR: 51 bpm

     

    CALORIES 2433
    SLEEP

    6hr 52 min total sleep

    95% efficiency
    RR: 14.4 ms
    REM: 2hr 06
    Deep: 1hr 54min
    HRV: 73 ms
    RHR: *does not show, based on graph est. 50 bpm

    **WHOOP did not refresh data for a significant time period. Internet connection was available.

    Lots of cleaning, cooking,

    Errands, etc. Active, but no workouts.

    14

    CALORIES 795SLEEP

    6 hrs 48min

    Sleep score: 72
    RR: 14.8 ms

    Body temp: -0.7°C

    REM: 1hr 11min

    Deep: 2hr 28min

    HRV: 75 ms

    RHR: 50 bpm

     

    CALORIES 628
    SLEEP

    6hr 42 total sleep

    88 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    2hr 19min

    HRV: 70 ms

    RHR: 53 bpm

     

    CALORIES 2320
    SLEEP

    7hr 03min total sleep

    93% efficiency
    RR: 14.7 ms
    REM: 2hr 23min
    Deep: 2hr 06min
    HRV: 77 ms
    RHR: *does not show, based on graph est. 45 bpm





    “we are currently experiencing intermittent delays in processing data”

    Lots of cleaning, errands, etc. Active, but no workouts.

    15

    CALORIES 713
    SLEEP

    6 hr 22min total sleep

    Sleep score: 67
    RR: 14.8 ms

    Body temp: +0.2°C

    REM: 1hr 14min

    Deep; 2hr 2min

    HRV: 91 ms

    RHR: 48 bpm

     

    CALORIES 598
    SLEEP

    6hr 18 total sleep

    69 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    1hr 21min

    HRV: 105 ms

    RHR: 48 bpm

     

    CALORIES 2222
    SLEEP

    7hr 01min total sleep

    94% efficiency
    RR: 14.3 ms
    REM: 3hr 06min
    Deep: 1hr 42min
    HRV: 122 ms
    RHR: *does not show, based on graph est. 45 bpm

    Lots of cleaning, errands, etc. Active, but no workouts

    Oura had me at 70% readiness; Biostrap at 80%; WHOOP at 90%. I felt slightly under slept but physically very well. Great workout, long walk, was motivated to work all day. 90% seems the most accurate.

    16

    CALORIES 1020
    SLEEP

    6 hr 36min total sleep

    Sleep score: 75
    RR: 13.8 ms

    Body temp: +0.0°C

    REM: 1hr 31min

    Deep: 2hr 24min

    HRV: 80 ms

    RHR: 45 bpm

     

    CALORIES 948
    SLEEP

    6hr 55min total sleep

    86 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    2hr 25min

    HRV: 65 ms

    RHR: 46 bpm

     

    CALORIES 2682
    SLEEP

    7hr 00min total sleep

    92% efficiency
    RR: 13.8 ms
    REM: 2hr 39min
    Deep: 1hr 34min
    HRV: 58 ms
    RHR: *does not show, based on graph est. 42 bpm

    Mentally tired. Felt like my sleep was not sufficient. Fasted day.

    WHOOP had me at 35% recovery, Biostrap at 68% and Oura at 70%.

    17

    CALORIES 505
    SLEEP

    6 Hour 16min total sleep

    Sleep score: 71
    RR: 14.5 ms

    Body temp: -0.1°C

    REM: 48min

    Deep: 2hr 03min

    HRV: 64 ms

    RHR: 50 bpm

     

     

     

     

     

     

     

    CALORIES 656
    SLEEP

    6hr 56min total sleep

    91 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    2hr 05min

    HRV: 59 ms

    RHR: 49 bpm

     

    CALORIES 2682
    SLEEP

    6hr 27 total sleep

    95% efficiency
    RR: 13.9
    REM: 2hr 05min
    Deep: 1hr 32min
    HRV: 64 ms
    RHR: *does not show, based on graph est. 45 bpm

    2nd day of fasting. Had a workout; did not do any walking. Sleep felt inadequate.

    My muscles felt very sore and I was lethargic; fasted state of 62hrs upon waking. Readiness scores:

    Oura: 67%

    Biostrap: 39%

    Whoop: 42%

    18

    CALORIES 801
    SLEEP

    4 hr 39min total sleep

    Sleep score: 67
    RR: 15.2 ms

    Body temp: -0.3°C

    REM: 50min

    Deep: 1hr 42min

    HRV: 52 ms

    RHR: 52 bpm

     

    CALORIES 519
    SLEEP

    4hr 59min total sleep

    67 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    1hr 48min

    HRV: 53 ms

    RHR: 52 bpm

     

    CALORIES 2692
    SLEEP

    4hr 52min total sleep

    96% efficiency
    RR: 15.3 ms
    REM: 1hr 55min
    Deep: 51min
    HRV: 55 ms
    RHR: *does not show, based on graph est. 50 bpm

    Fasted, 84hrs upon waking. Yesterday’s workout (calories tracked) was one of the hardest I have ever done. Very poor sleep.
    Recovery/Readiness scores:


    Oura: 57%

    Biostrap: 28%

    WHOOP: 27%

    19

    Calories 632
    SLEEP

    4hr 58min total sleep

    Sleep score: 70
    RR: 15.5 ms

    Body temp: -0.9°C

    REM: 50min (17%)

    Deep: 1hr 35min (32%)

    HRV: 50 ms

    RHR: 53 bpm

     

    CALORIES 409
    SLEEP

    4hr 58min total sleep

    60 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    1hr 26min

    HRV: 42 ms

    RHR: 56 bpm

     

    CALORIES 2203
    SLEEP

    5hr 09min total sleep

    99% efficiency
    RR: 15.5 ms
    REM: 2hr 00min
    Deep: 57min
    HRV: 63 ms
    RHR: *does not show, based on graph est. 53 bpm

    Woke up at 108hrs fasted. Worked out again the day before and my body wouldn’t listen. Could not complete workout. Shoulders felt like they will “fall off.”


    Recovery/Readiness scores:

    Oura: 54%

    Biostrap: 19%

    WHOOP: 36%

    20

    CALORIES 506
    SLEEP

    6 hr 12min total sleep

    Sleep score: 68
    RR: 16.5 ms

    Body temp: +0.1°C

    REM: 1hr 13min (20%)

    Deep: 2hr 58min (48%)

    HRV: 41 ms

    RHR: 57 bpm

     

    CALORIES 342
    SLEEP

    6hr 09 total sleep

    80 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    2hr 11min

    HRV: 35 ms

    RHR: 64 bpm

     

    CALORIES 2303
    SLEEP

    6hr 02min total sleep

    94% efficiency
    RR: 16.9 ms
    REM: 1hr 49min
    Deep: 1hr 29min
    HRV: 50 ms
    RHR: *does not show, based on graph est. 56 bpm

    Broke my fast the afternoon before and did one last workout. I woke up feeling annihilated.

    WHOOP’s efficiency seemed sketchy.

    21

    CALORIES 523
    SLEEP

    8hr 05min total sleep

    Sleep score: 81
    RR: 14.8 ms

    Body temp: +0.7°C

    REM: 2hr 03min (25%)

    Deep; 1hr 39min (21%)

    HRV: 60 ms

    RHR: 53 bpm

     

    CALORIES 412
    SLEEP

    8hr 01min total sleep

    85 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    2hr 36min

    HRV: 63 ms

    RHR: 55 bpm

     

    CALORIES 2360
    SLEEP

    8hr 23min total sleep

    90 “sleep score”

    RR: 15.0 ms
    REM: 2hr 51min
    Deep: 2hr 42min
    HRV: 74 ms
    RHR: *does not show, based on graph est. 55 bpm

    Rest day; muscles were still very tired. Treat day with pizza + 18oz red wine.


    22

    CALORIES 705
    SLEEP

    7hr 0min total sleep

    Sleep score: 69
    RR: 14.1 ms

    Body temp: +0.2°C

    REM: 1hr 20min (19%)

    Deep: 1hr 25min (20%)

    HRV: 98 ms

    RHR: 46 bpm

     

    CALORIES 639
    SLEEP

    7hr 22min total sleep

    73 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    2hr 13min

    HRV: 82 ms

    RHR: 44 bpm

     

    CALORIES 2198
    SLEEP

    8hr 08min total sleep

    89 “sleep score”

    RR: 14.0 ms
    REM: 2hr 12min
    Deep: 1hr 45min
    HRV: 67
    RHR: *does not show, based on graph est. 40 bpm

    Went for a walk; ran errands; did chores around the house. Reasonably active, but no hard workout. Sleep was fairly good, but woke up twice. Felt very well-rested.

    23

    CALORIES 637

    6hr 11min

    Sleep score: 73
    RR: 13.5 ms

    Body temp: -0.2°C

    REM: 1hr 10min (19%)

    Deep: 2hr 40min (43%)

    HRV: 89 ms

    RHR: 46 bpm

     

    CALORIES 373
    SLEEP

    6hr 27 total sleep

    83 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    1hr 46min

    HRV: 80 ms

    RHR: 43 bpm

     

    CALORIES 2428
    SLEEP

    6hr 39 total sleep

    99 “sleep score”

    RR: 13.2
    REM: 2hr 32min
    Deep: 2hr 20min
    HRV: 108 ms
    RHR: *does not show, based on graph est. 43 bpm

    Did my first workout following the 5-day fast; felt good. Sleep quality was below average;

    24

    CALORIES 694
    SLEEP

    SLEEP

    6hr 39min total sleep

    Sleep score: 72
    RR: 14.6

    Body temp: -0.2°C

    REM: 54min (14%)

    Deep: 2hr 13min (33%)

    HRV: 113 ms

    RHR: 43 bpm

     

    CALORIES 431
    SLEEP

    7hr 07min total sleep

    95 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    2hr 11min

    HRV: 107 ms

    RHR: 41 bpm

     

    CALORIES 2262
    SLEEP

    7hr 05min total sleep

    96 “sleep score”

    RR: 14.8 ms
    REM: 2hr 41min
    Deep: 1hr 17min
    HRV: 124 ms
    RHR: *does not show, based on graph est. 39 bpm

    Good workout; my muscles were still a bit sore and not fully recovered. Woke up refreshed; felt good.

    Recovery scores:

    Oura: 77%
    Biostrap: 83%

    WHOOP: 96%

    25

    CALORIES 753
    SLEEP

    7 hr 21min total sleep

    Sleep score: 79
    RR: 13.4 ms

    Body temp: -0.3°C

    REM: 1hr 10min (16%)

    Deep; 1hr 48min (25%)

    HRV: 75 ms

    RHR: 44 bpm

     

    CALORIES 499
    SLEEP

    NOT RECORDED


    DID NOT RECORD. BAND STILL HAD BATTERY

     

    CALORIES 2350
    SLEEP

    7hr 39min total sleep

    94 “sleep score”

    RR: 13.6 ms
    REM: 2hr 29min
    Deep: 1hr 37min
    HRV: 90 ms
    RHR: *does not show, based on graph est. 42 bpm

    Good workout yesterday, bag workout + weights. Disoriented when waking as I woke from a phone call and not “naturally”, but once I woke up I felt good.


    Recovery scores:
    Oura: 80%
    WHOOP: 74%

    26

    CALORIES 858
    SLEEP

    7 hr 20min total sleep

    Sleep score: 77
    RR: 14.2 ms

    Body temp: -0.0°C

    REM: 1hr 21min (18%)

    Deep: 2hr 23min (33%)

    HRV: 97 ms

    RHR: 45 bpm

     

    CALORIES 487
    SLEEP

    7hr 33min total sleep

    93 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    2hr 34 min

    HRV: 89 ms

    RHR: 43 bpm

     

    CALORIES 2779
    SLEEP

    7hr 38min total sleep

    92 “sleep score”

    RR: 14.7 ms
    REM: 2hr 27min
    Deep: 1hr 46min
    HRV: 92 ms
    RHR: *does not show, based on graph est. 42 bpm

    Had a hard time waking up that morning; felt groggy. Only Oura seemed to pick up on this, based on sleep scores. Once I woke up, I felt pretty good and had a very productive day.

    RECOVERY

    Oura: 80%
    Biostrap: 88%
    WHOOP: 72%

    27

    CALORIES 816
    SLEEP

    5hr 48min total sleep

    Sleep score: 67
    RR: 14.5 ms

    Body temp: -0.4°C

    REM: 0hr 49min (14%)

    Deep; 1hr 58min (34%)

    HRV: 85 ms

    RHR: 45 bpm

     

    CALORIES 676
    SLEEP

    5hr 18 total sleep

    70 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    2hr 03

    HRV: 86 ms

    RHR: 44 bpm

     

    CALORIES 2181
    SLEEP

    6hr 12min total sleep

    91 “sleep score”

    RR: 14.8 ms
    REM: 2hr 31min
    Deep: 1hr 41min
    HRV: 77
    RHR: *does not show, based on graph est. 43 bpm

    Didn’t have a great sleep; no workout the previous day, but lots of errands, moving boxes, etc. Active day.

    28

    CALORIES 622
    SLEEP

    7hr 02min total sleep

    Sleep score: 79
    RR:14.1 ms

    Body temp: -0.0°C

    REM: 1hr 30min (21%)

    Deep: 2hr 01min (29%)

    HRV: 75 ms

    RHR: 46 bpm

     

    CALORIES 450
    SLEEP

    7hr 47min total sleep

    81 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    1hr 36

    HRV: 84 ms

    RHR: 47 bpm

     

    CALORIES 2067
    SLEEP

    7hr 51min total sleep

    92 “sleep score”

    RR: 13.9 ms
    REM: 2hr 59min
    Deep: 2hr 27min
    HRV: 104 ms
    RHR: *does not show, based on graph est. 43 bpm

    Slightly fatigued; didn’t have a great sleep. Woke up a few times, but all of my scores were pretty high.

    29

    CALORIES 1181
    SLEEP

    5hr 38min total sleep

    Sleep score: 63
    RR: 14.5 ms

    Body temp: -0.3°C

    REM: 0hr 40min (12%)

    Deep: 1hr 59min (35%)

    HRV: 100 ms

    RHR: 46 bpm

     

    CALORIES 770
    SLEEP

    5hr 48min total sleep

    69 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    1hr 21min

    HRV: 87 ms

    RHR: 50 bpm

     

    CALORIES 2479
    SLEEP

    6hr 18min total sleep

    97 “sleep score”

    RR: 14.0 ms
    REM: 2hr 33min
    Deep: 1hr 28min
    HRV: 82 ms
    RHR: *does not show, based on graph est. 45 bpm

    Did not get a very good sleep; felt tired upon waking.

    Recovery scores:

    Oura: 76%
    Biostrap: 80%

    WHOOP: 49%

    30

    CALORIES 338
    SLEEP

    6hr 30min total sleep

    Sleep score: 74
    RR: 13.8 ms

    Body temp: +0.3°C

    REM: 0hr 58min (15%)

    Deep: 2hr 56min (45%)

    HRV: 77 ms

    RHR: 45 bpm

     

    CALORIES 253
    SLEEP

    6hr 29min total sleep

    91 “sleep score”

    RR: does not score

    REM
    DEEP: combines deep and REM

    2hr 25min

    HRV: 57 ms

    RHR: 43 bpm

     

    CALORIES 2087
    SLEEP

    7hr 07min total sleep

    95 “sleep score”

    RR: 13.4 ms
    REM: 3hr 03
    Deep: 1hr 40min
    HRV: 86 ms
    RHR: *does not show, based on graph est. 43 bpm

     

     

    With everything above in mind, my clear pick is the Oura ring, with
    WHOOP coming in second place and Biostrap a very distant third.
    1. Oura
    2. WHOOP
    3. Biostrap