Physiological monitoring devices with adjustable stability

1. A monitoring device configured to be attached to a body of a subject, the monitoring device comprising:

at least one physiological sensor configured to detect and/or measure physiological information from the subject;

at least one activity sensor configured to detect a change in physical activity of the subject as the subject is exercising or beginning to exercise;

at least one actuator configured to adjust stability of the monitoring device relative to the body of the subject; and

at least one processor in communication with the at least one activity sensor and the at least one actuator, wherein the at least one processor is configured to control the at least one actuator to adjust the stability of the monitoring device relative to the body of the subject in response to the at least one activity sensor detecting a change in the physical activity of the subject.

2. The monitoring device of claim 1 , wherein the at least one processor controls the at least one actuator to increase the stability of the monitoring device relative to the body of the subject in response to the at least one activity sensor detecting an increase in the physical activity of the subject, and wherein the at least one processor controls the at least one actuator to decrease the stability of the monitoring device relative to the body of the subject in response to the at least one activity sensor detecting a decrease in the physical activity of the subject.

3. The monitoring device of claim 1 , wherein the at least one activity sensor is configured to detect a change in the physical activity of the subject by detecting a change in at least one subject vital sign, wherein the at least one subject vital sign includes subject heart rate, subject blood pressure, subject temperature, subject respiration rate and/or subject perspiration rate.

4. The monitoring device of claim 1 , wherein the at least one activity sensor is configured to detect a change in the physical activity of the subject by identifying or predicting a type of activity.

5. The monitoring device of claim 1 , wherein the at least one activity sensor comprises a motion sensor, and wherein the at least one activity sensor is configured to detect a change in the physical activity of the subject by detecting a change in subject motion via the motion sensor.

6. The monitoring device of claim 1 , wherein the at least one actuator comprises one or more of the following: at least one bladder that is expandable and retractable, a material that changes shape in response to an application of light and/or heat thereto, a material that undergoes a phase change in response to a change in temperature, a conductive material that changes shape in response to an application of electrical current thereto, at least one electromechanical actuator.

7. The monitoring device of claim 1 , wherein the monitoring device is configured to be positioned at or within an ear of the subject, and wherein the at least one actuator is configured to adjust the stability of the monitoring device relative to a portion of the ear of the subject.

8. The monitoring device of claim 1 , wherein the monitoring device comprises a band configured to be secured to an appendage of the subject, and wherein the at least one actuator is configured to adjust the stability of the monitoring device relative to a portion of the appendage of the subject.

9. The monitoring device of claim 8 , wherein the at least one actuator is configured to adjust tension of the band around the appendage of the subject.

10. The monitoring device of claim 8 , wherein the band comprises an electroactive polymer material, a thermoactive material, or a piezoactive material.

11. The monitoring device of claim 1 , wherein the at least one physiological sensor comprises at least one optical emitter and at least one optical detector.

12. A method of monitoring a subject via a monitoring device, wherein the monitoring device includes at least one physiological sensor configured to detect and/or measure physiological information from the subject, at least one activity sensor configured to detect a change in physical activity of the subject as the subject is exercising or beginning to exercise, at least one actuator configured to adjust stability of the monitoring device relative to a body of the subject, and at least one processor in communication with the at least one activity sensor and the at least one actuator, the method comprising:

detecting and/or measuring physiological information from the subject via the at least one physiological sensor;

detecting a change in the physical activity of the subject via the at least one activity sensor as the subject is exercising or beginning to exercise; and

controlling the at least one actuator, via the at least one processor, to adjust the stability of the monitoring device relative to the body of the subject in response to the detected change in the physical activity of the subject.

13. The method of claim 12 , wherein the at least one processor controls the at least one actuator to:

increase the stability of the monitoring device relative to the body of the subject in response to the at least one activity sensor detecting an increase in the physical activity of the subject; and

decrease the stability of the monitoring device relative to the body of the subject in response to the at least one activity sensor detecting a decrease in the physical activity of the subject.

14. The method of claim 12 , wherein detecting a change in the physical activity of the subject via the at least one activity sensor comprises detecting a change in at least one subject vital sign, wherein the at least one subject vital sign includes subject heart rate, subject blood pressure, subject temperature, subject respiration rate, and/or subject perspiration rate.

15. The method of claim 12 , wherein the at least one activity sensor comprises a motion sensor, and wherein detecting a change in the physical activity of the subject comprises detecting a change in subject motion via the motion sensor.

16. A monitoring device configured to be attached to a body of a subject, the monitoring device comprising:

at least one physiological sensor configured to detect and/or measure physiological information from the subject;

at least one environmental sensor configured to detect and/or measure at least one environmental condition in a vicinity of the subject;

at least one actuator configured to adjust stability of the monitoring device relative to the body of the subject; and

at least one processor in communication with the at least one environmental sensor and the at least one actuator, wherein the at least one processor is configured to control the at least one actuator to adjust stability of the monitoring device relative to the body of the subject in response to the at least one environmental sensor detecting a change in the at least one environmental condition.

17. The monitoring device of claim 16 , wherein the at least one environmental condition comprises one or more of the following: temperature, humidity, air quality, barometric pressure, radiation, light intensity, and sound.

18. The monitoring device of claim 16 , wherein the at least one actuator comprises one or more of the following: at least one bladder that is expandable and retractable, a material that changes shape in response to an application of light and/or heat thereto, a material that undergoes a phase change in response to a change in temperature, a conductive material that changes shape in response to an application of electrical current thereto, and at least one electromechanical actuator.

19. The monitoring device of claim 16 , wherein the monitoring device is configured to be positioned at or within an ear of the subject, and wherein the at least one actuator is configured to adjust a grip of the monitoring device relative to a portion of the ear of the subject.

20. The monitoring device of claim 16 , wherein the monitoring device comprises a band configured to be secured to an appendage of the subject, and wherein the at least one actuator is configured to adjust a grip of the monitoring device relative to a portion of the appendage of the subject.

21. The monitoring device of claim 20 , wherein the at least one actuator is configured to adjust a tension of the band around the appendage of the subject.

22. The monitoring device of claim 20 , wherein the band comprises an electro active polymer material.

23. The monitoring device of claim 16 , wherein the at least one physiological sensor comprises at least one optical emitter and at least one optical detector.

24. A method of monitoring a body of a subject via a monitoring device, wherein the monitoring device includes at least one physiological sensor configured to detect and/or measure physiological information from the subject, at least one environmental sensor configured to detect and/or measure at least one environmental condition in a vicinity of the subject, at least one actuator configured to change stability of the monitoring device relative to the body of the subject, and at least one processor in communication with the at least one environmental sensor and the at least one actuator, the method comprising:

detecting and/or measuring physiological information from the subject via the at least one physiological sensor;

detecting a change in the at least one environmental condition in the vicinity of the subject; and

controlling the at least one actuator, via the at least one processor, to adjust the stability of the monitoring device relative to the body of the subject in response to the detected change in the at least one environmental condition.

25. The method of claim 24 , wherein controlling the at least one actuator to adjust the stability of the monitoring device relative to the body of the subject comprises:

increasing a grip of the monitoring device relative to the body of the subject in response to detecting an increase in the at least one environmental condition; and

decreasing the grip of the monitoring device relative to the body of the subject in response to detecting a decrease in the at least one environmental condition.

26. The method of claim 24 , wherein the at least one environmental condition comprises one or more of the following: temperature, humidity, air quality, barometric pressure, radiation, light intensity, and sound.