Eligibility Criteria

You may qualify to participate if you

• Are 21-65 years of age at time of enrollment

• Willing and able to wear two wrist-worn study devices, one on each wrist, and additional reference devices (chest strap, distance/elevation reference) during scheduled study visits

• Have a wrist circumference between 130-220 mm

• Able to complete protocol-defined physical activities (treadmill walk / run, stationary bike, rowing, elliptical, HIIT, weightlifting, yoga, outdoor walk / run / bike)

• Able to follow written and verbal instructions in English

• Can self-report general good health appropriate for the activity intensity required

• Are willing and able to wear contact lenses in lieu of prescription eyeglasses, if applicable

• Are willing and able to remove makeup, if applicable. Permanent or semi-permanent makeup (e.g., false eyelashes, tattoos) near the eye areas will be noted by study staff.

Participants will be excluded if any of the following conditions are present

• Subjects with self-reported known cardiovascular disease including:

  • Ischemic heart disease or any heart failure;

  • Moderate or severe heart valve disease;

  • Chest pain at rest or with exertion;

  • Aneurysm (brain, aortic);

  • Atrial fibrillation or other significant cardiac dysrhythmia;

  • Prior stroke or transient ischemic attack;

  • Cardiac pacemaker and/or automatic implantable cardioverter-defibrillator;

  • Uncontrolled high blood pressure;

• Subjects with self-reported known respiratory conditions such as:

  • Uncontrolled / severe asthma or chronic obstructive pulmonary disease or emphysema;

  • Shortness of breath / respiratory distress;

  • Severe obstructive sleep apnea;

• Subjects with self-reported current pregnancy, status within 12 weeks post-partum, and/or breastfeeding, or who might be pregnant

• Subjects with self-reported major surgery in the past year (for example, heart, lung, brain, abdominal or orthopedic)

• Subjects with self-reported recent (within 12 weeks) musculoskeletal injury, surgery, or condition limiting full range of the protocol activities; 

• Use of medications known to materially affect heart rate response to exercise (e.g., beta-blockers) at investigator discretion; 

• Inability to complete study activities safely due to balance, mobility, or cognitive limitations; 

• Subject is unwilling/unable to perform any aspect of an exercise protocol, including inability to complete walk, run, bike, rowing, elliptical, HIIT, weightlifting, yoga, and outdoor walk/run/bike protocol;

• Subjects with self-reported known skin condition or allergy that contraindicates wrist-worn devices or chest strap (e.g., active eczema, contact dermatitis, tattoos that may interfere with PPG signal); 

• Tattoos, wounds, or scar in the optical path of the Study Smart Watch, Study Smart Band, or reference devices;

• Subjects who have participated in a drug study within the past 30 days or any investigational study visits within the past 48 hours;

• Any condition that, in the opinion of the investigator, would compromise participant safety or data integrity;

• Occupational exclusion: Subjects who work for a company (except Motus7) that sells consumer health devices (e.g. wearable fitness bands) or a technology focused media company (e.g. newspaper, TV magazine or bloggers, etc.) will be excluded from the study.