Data Type Catalog

Measures pedal revolutions per minute (RPM) during cycling.

Maximum oxygen uptake during exercise, a key indicator of cardiorespiratory fitness.

Measures the number of strokes performed while swimming.

Measures the distance the user has moved by walking or running.

Measures the instantaneous power output during cycling in watts.

A proprietary Nike activity metric that quantifies overall physical activity into a single numeric score (largely deprecated).

Measures the distance traveled while skiing or snowboarding downhill.

Measures the temperature of the water during swimming or diving activities.

Measures the energy expended through physical activity and movement above resting metabolic rate.

The rate of travel during running activities, typically measured in meters per second or minutes per mile/kilometer.

Measures the instantaneous speed during cycling activities.

Measures the amount of time the user has spent standing throughout the day.

Measures the number of wheelchair pushes performed by the user for mobility and exercise.

Measures the user's depth underwater during diving activities.

The rate of mechanical work performed during running, measured in watts.

The distance covered in a single running stride, measured from one foot contact to the next contact of the same foot.

Measures the number of steps the user has taken.

Counts the number of flights of stairs climbed, where one flight equals approximately 10 feet (3 meters) of elevation gain.

Measures the resting energy expenditure (calories burned at rest) to maintain basic physiological functions.

The duration each foot spends in contact with the ground during a running stride.

Measures the distance the user has moved using a wheelchair.

Measures the distance the user has moved by cycling.

The amount of vertical bounce or up-and-down movement during each running stride.

Measures the perceived intensity of physical activity on a standardized effort scale.

Measures the amount of time the user has spent performing activities involving full-body movements, primarily designed for wheelchair users.

Measures the distance the user has moved by swimming.

Represents the maximum power a cyclist can sustain for approximately one hour.

Measures the amount of time the user spent exercising at or above a brisk walk intensity.

Records events when heart rate falls below a user-configured threshold while the user has been inactive.

Records events when walking steadiness measurements indicate increased fall risk, categorized by severity.

Records sleep stages and time spent in bed, including detailed sleep architecture data.

Records events when heart rate exceeds a user-configured threshold while the user appears inactive.

Records events when environmental sound levels reach potentially harmful thresholds for hearing health.

Records events when VO2 max estimates fall below clinically significant thresholds indicating poor cardiorespiratory fitness.

Records whether the user stood and moved for at least one minute during a given hour.

Records events when Apple Watch detects heart rhythm patterns suggestive of atrial fibrillation (AFib).

Records events when headphone audio levels exceed safe listening thresholds, risking hearing damage.

Records mindfulness or meditation sessions, tracking time spent in intentional mental health practice.

The proportion of total body mass composed of adipose tissue, expressed as a percentage.

A measurement of the circumference of the waist at the level of the umbilicus or narrowest point, a key indicator of central adiposity and cardiometabolic risk.

A measurement of the user's standing height, a fundamental anthropometric parameter used for health assessment, growth monitoring, and clinical calculations.

A calculated ratio of weight to height used to classify weight status and assess health risks.

The user's total body weight, typically measured using a scale.

The total body mass minus all fat tissue, including muscle, bone, organs, and water.

A relative measurement of wrist skin temperature deviation from a personal baseline, recorded during sleep by Apple Watch, used for menstrual cycle tracking and detecting physiological changes.

Indicates whether the user uses a wheelchair, enabling appropriate activity tracking and metrics.

The user's skin phototype classification used for UV exposure recommendations and skin health guidance.

Specifies whether the Activity ring tracks Active Calories or Exercise Minutes as the Move goal.

The user's biological sex as set in their Health profile, used for health calculations and reference ranges.

The user's date of birth as set in their Health profile, used for age-based health calculations.

The user's ABO blood type and Rh factor as set in their Health profile.

A correlation grouping nutritional data from a single food item or meal, including calories and nutrients.

A correlation grouping systolic and diastolic blood pressure readings taken at the same time.

Duration of exposure to outdoor daylight conditions, measured in minutes, relevant for circadian rhythm regulation, mental health, and eye health.

Audio level exposure from headphones and earbuds measured in A-weighted decibels (dB(A)), tracking personal listening habits for hearing protection.

Ambient sound level exposure measured in A-weighted decibels (dB(A)), indicating potential hearing damage risk from environmental noise.

Amount of environmental noise reduced by active noise cancellation in compatible earbuds, measured in decibels (dB).

Concentration of alcohol in blood, indicating intoxication level with legal and health implications

Count of inhaler actuations for asthma and COPD management tracking

Amount of insulin delivered for diabetes management, tracking basal and bolus doses in international units

Total volume of air forcefully exhaled after maximum inhalation, essential for assessing lung capacity and restrictive diseases

Maximum speed of exhalation measuring airway patency, essential for asthma self-monitoring and action plan guidance

Ultraviolet radiation exposure measurement for skin cancer risk assessment and vitamin D synthesis tracking

Skin conductance measurement indicating sympathetic nervous system arousal and stress response

Cumulative count of detected fall events for fall risk assessment and elderly health monitoring

Volume of air forcefully exhaled in the first second of spirometry, a key indicator of obstructive lung disease

Speed of climbing stairs, measuring vertical velocity during stair ascent.

Percentage of the gait cycle when both feet are simultaneously in contact with the ground.

Composite measure of walking stability and balance, used to estimate fall risk.

Speed of descending stairs, measuring vertical velocity during stair descent.

Percentage difference in step time between left and right legs during walking.

Average distance covered with each step during walking, a fundamental gait parameter.

Average speed during walking, a key indicator of functional mobility and overall health status.

Total distance walked during a standardized six-minute walk test, a validated measure of functional capacity.

Total fat intake from all dietary sources

Fat-soluble vitamin essential for blood clotting and bone metabolism

Records dietary intake of niacin (vitamin B3), essential for energy metabolism, DNA repair, and cellular signaling.

Iron intake from food and supplements, essential for oxygen transport and energy metabolism.

Total carbohydrate intake including sugars, starches, and fiber

Records dietary intake of riboflavin (vitamin B2), essential for energy production and antioxidant function.

Cholesterol intake from animal-based foods

Monounsaturated fatty acid intake, primarily from olive oil, nuts, and avocados

Copper intake from food and supplements, essential for iron metabolism, connective tissue, and nervous system function.

Records dietary intake of folate (vitamin B9), essential for DNA synthesis, cell division, and neural tube development.

Phosphorus intake from food and supplements, essential for bone structure, energy metabolism, and cellular function.

Total fiber intake from plant-based foods and supplements

Selenium intake from food and supplements, essential for antioxidant defense, thyroid function, and immune health.

Fat-soluble vitamin essential for vision, immune function, and cellular growth

Chloride intake from food and supplements, essential for fluid balance, gastric acid production, and nerve transmission.

Water-soluble vitamin essential for amino acid metabolism, neurotransmitter synthesis, and hemoglobin formation

Zinc intake from food and supplements, essential for immune function, wound healing, and protein synthesis.

Count of standard alcoholic drinks consumed, used to track alcohol intake for health monitoring.

Records dietary intake of biotin (vitamin B7), essential for carboxylase enzymes in fatty acid, amino acid, and glucose metabolism.

Chromium intake from food and supplements, involved in insulin signaling and macronutrient metabolism.

Total caloric energy intake from food and beverages

Water-soluble antioxidant essential for collagen synthesis, immune function, and iron absorption

Records dietary intake of thiamin (vitamin B1), essential for carbohydrate metabolism and neurological function.

Potassium intake from food and supplements, essential for fluid balance, nerve transmission, and muscle contraction.

Sodium intake from food, beverages, and table salt

Magnesium intake from food and supplements, essential for energy metabolism, muscle function, and bone health.

Total protein intake from food and supplements

Total caffeine consumed from beverages, food, and supplements, measured in milligrams.

Iodine intake from food and supplements, essential for thyroid hormone synthesis and metabolic regulation.

Polyunsaturated fatty acid intake including omega-3 and omega-6 essential fatty acids

Saturated fatty acid intake from animal and tropical plant sources

Calcium intake from food and supplements, essential for bone health and muscle function.

Manganese intake from food and supplements, essential for bone formation, metabolism, and antioxidant defense.

Total sugar intake including natural and added sugars

Fat-soluble antioxidant protecting cell membranes from oxidative damage

Molybdenum intake from food and supplements, essential as a cofactor for enzymes involved in sulfur metabolism.

Total water consumed from beverages and food, measured in milliliters or liters.

Records dietary intake of pantothenic acid (vitamin B5), essential for coenzyme A synthesis and acyl carrier protein function.

Water-soluble vitamin essential for DNA synthesis, neurological function, and red blood cell formation

Fat-soluble vitamin essential for calcium absorption, bone health, immune function, and cellular regulation

Records handwashing events detected automatically or logged manually, tracking hygiene behavior.

Records toothbrushing events with duration and timing information.

Records results from home pregnancy tests that detect human chorionic gonadotropin (hCG).

Records results from ovulation predictor kit (OPK) tests that detect the LH surge preceding ovulation.

Tracks contraceptive methods used, including hormonal, barrier, and other birth control types.

Tracks breastfeeding and pumping sessions for postpartum mothers.

Records spotting or bleeding that occurs between menstrual periods.

Logs sexual activity events with optional indication of protection use for fertility and reproductive health tracking.

Records pregnancy status to provide context for other health metrics during gestation.

System-generated notification indicating menstrual cycles are occurring less frequently than typical, potentially signaling oligomenorrhea.

Tracks menstrual bleeding intensity during a period, ranging from none to heavy flow.

System-generated notification indicating significant variability in menstrual cycle length from month to month.

System-generated notification indicating spotting or bleeding between periods has occurred repeatedly across multiple menstrual cycles.

Records results from progesterone tests used to confirm ovulation and assess luteal phase function.

Tracks cervical mucus characteristics to identify fertile windows through natural family planning methods.

System-generated notification indicating menstrual bleeding is lasting longer than typical, potentially signaling menorrhagia.

Tracks episodes and severity of nausea

Tracks episodes of whistling sounds during breathing

Tracks episodes and severity of nasal discharge

Tracks episodes and severity of throat pain or irritation

Tracks episodes of involuntary urine leakage.

Tracks episodes of cramping pain in the abdominal region.

Tracks episodes of dyspnea or breathing difficulty

Tracks episodes of dizziness, lightheadedness, or vertigo.

Tracks changes in emotional state or mood stability

Tracks episodes of dry, rough, or flaky skin.

Tracks episodes of perceived missed or extra heartbeats

Tracks episodes of fever or elevated body temperature.

Tracks episodes of heartburn or acid reflux symptoms

Tracks changes in sleep patterns or quality

Tracks coughing episodes and their severity.

Tracks episodes and severity of pelvic region pain

Tracks episodes of chest tightness, pressure, or pain.

Tracks episodes and severity of lower back pain

Tracks episodes of widespread muscle aches and body pain.

Tracks episodes of sudden warmth and flushing, commonly associated with menopause

Tracks headache episodes and their severity.

Tracks changes in appetite including increased or decreased hunger.

Tracks episodes of constipation and difficulty passing stool.

Tracks episodes and severity of nasal and sinus congestion

Tracks episodes of chills and shivering.

Tracks acne breakouts and their severity.

Tracks episodes of fatigue, tiredness, or exhaustion.

Tracks episodes and severity of vomiting

Tracks episodes of unusual hair shedding or thinning.

Tracks episodes of diarrhea and loose stools.

Tracks episodes of abdominal bloating and distension.

Tracks episodes of excessive sweating during sleep

Tracks episodes of palpitations or awareness of heartbeat

The number of breaths taken per minute, typically measured during sleep.

A measure of peripheral blood flow derived from pulse oximetry, representing the ratio of pulsatile to non-pulsatile blood components.

Measures the number of times the heart beats per minute.

The lowest body temperature attained during rest, typically measured immediately upon waking, used primarily for fertility awareness and ovulation tracking.

A measurement of the body's internal temperature, a fundamental vital sign indicating metabolic and immune system status.

The maximum arterial pressure during heart contraction, representing the upper number in a blood pressure reading.

Measures the user's average heart rate while walking, providing insight into cardiovascular fitness during light activity.

The minimum arterial pressure between heartbeats when the heart relaxes, representing the lower number in a blood pressure reading.

The concentration of glucose in the blood, a key indicator for diabetes management and metabolic health.

Measures the standard deviation of normal-to-normal heartbeat intervals, reflecting autonomic nervous system function and overall physiological resilience.

Measures the reduction in heart rate from peak exercise intensity to one minute after exercise cessation, a powerful indicator of cardiovascular fitness and autonomic function.

Measures the heart rate while the user is at rest and relaxed, typically the lowest heart rate during waking hours.

The percentage of hemoglobin in the blood that is saturated with oxygen.

An estimate of the percentage of time a person's heart shows signs of atrial fibrillation over a defined monitoring period.