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Health-Related Physical Fitness Level From Smartwatches

Health-Related Physical Fitness Level From Smartwatches

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT06805422
Enrollment
80
Registered
2025-02-03
Start date
2025-01-01
Completion date
2025-12-25
Last updated
2025-08-26

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Exercise Capacity, Flexibility, Strength and Endurance

Brief summary

Health-related physical fitness (HRPF) has demonstrated high clinical relevance, and its level is associated with the ability to perform activities of daily living with vigor and a lower risk of chronic disease. Consequently, exercise prescription guidelines recommend improving HRPF as a focus for prevention and rehabilitation programs. Measuring and tracking HRPF often requires specialized equipment and personnel, which are expensive and less applicable to the general population. Wearables may mitigate this issue by providing useful estimates of the HRPF.

Detailed description

Health-related physical fitness (HRPF) has high clinical relevance \[1\]. It is associated with the ability to perform activities of daily living with vigor and a lower risk of chronic disease \[2\]. Consequently, exercise prescription guidelines recommend improving HRPF as a focus for prevention and rehabilitation programs \[3\]. The American College of Sports Medicine (ACSM) \[3\] grouped the HRFP into five domains: cardiorespiratory endurance, body composition, muscular strength, muscular endurance, and flexibility. However, measuring and tracking the fitness levels for all HRPF domains requires specialized laboratory equipment and personnel, which are expensive and less applicable to the general population. Wearable technology mitigates this issue and has proven to be a reliable alternative capable of providing useful estimates of the HRPF \[4\] \[5\] \[6, 7\]. Previous work has predicted ACSM HRPF domains from anthropometric and laboratory bioelectrical impedance analysis data (BIA) \[8\] \[9\]. Nevertheless, their data are based on the National Fitness Award (NFA), a nationwide test used to assess the physical fitness of the general South Korean population that is collected using specialized laboratory equipment under the supervision of health professionals. Current advances in wearables may allow us to estimate the fitness level for all HRPF domains using only smartwatch data, enabling economic, non-intrusive predictions and being available during the user's daily routine. The complete characterization of health-related fitness as a multidimensional depiction of the user's fitness status can be used to track health status continuously and to design specialized training prescriptions. The main goal of this study is to estimate the fitness level for all HRFP domains from data obtained from smartwatches during unsupervised activities of daily living. We hypothesized that data from smartwatches could be used to estimate the fitness levels from all HRPF domains.

Interventions

None listed

Sponsors

Kansas State University
Lead SponsorOTHER

Study design

Observational model
COHORT
Time perspective
PROSPECTIVE

Eligibility

Sex/Gender
ALL
Age
20 Years to 60 Years
Healthy volunteers
Yes

Inclusion criteria

Group 1 (Aerobically Trained) * 20-60 years old * actively training or competing over the past 2 years * 3 or more days of vigorous activity accumulating approximately least 1500 MET min/week or 7 days of any combination of walking, moderate, or vigorous intense activities achieving a minimum of 3000 MET min/week Group 2 (Strength trained) * 20-60 years old * actively training or competing over the past 2 years * 3 or more days of muscle-strengthening exercise at an intensity of approximately 5 out of 10 Group 3 (Not actively training) * 20-60 years old * actively training or competing over the past 2 years * 3 or more days of muscle-strengthening exercise at an intensity of approximately 5 out of 10 Group 5 (High flexibility) * 20-60 years old * Sit-and-reach performance is categorized as very good or excellent based on the American College of Sports Medicine's sit-and-reach evaluation criteria (Table 4.16 of ACSM's Guidelines for Exercise Testing and Prescription 9th edition).

Design outcomes

Primary

MeasureTime frameDescription
Maximum Oxygen Consumption (VO2max)Performed 14-day after wearing the smartwatchMaximum oxygen consumption (VO2max) will be measured using a standard Ramp protocol on a standardized treadmill.

Secondary

MeasureTime frameDescription
% fat free massPerformed at baseline and 14-days after wearing the smartwatchBio-electrical impedance will be used to assess % fat free mass
Sit-and-reach distancePerformed at baseline and 14-days after wearing the smartwatchFollowing a brief warm-up (including stretching exercises, cycling, or treadmill (less than 5 minutes)), participants will be instructed to sit on the floor with their legs extended and feet flat, without shoes, against the front of the test box. Upon command, the participant will slowly and steadily lean forward at the hips, keeping the knees straight and sliding their hand up the ruler as far as possible, ensuring that both hands reach an equal distance during the test and that the subject's knees remain grounded. The distance reached in centimeters will be recorded.
# of Push-up completedPerformed at baseline and 14-days after wearing the smartwatchUpper body endurance will be assessed via a standard push-up test. The total number of correctly executed push-ups will be recorded

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026