Health effects of a 12-week web-based lifestyle intervention program in healthy adults - Formative Evaluation of the TK-HealthCoach (FitnessCoaching/WeightLossCoaching)

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

DRKS

Registry ID

DRKS00016512

Enrollment

100

Registered

2019-05-06

Start date

2019-05-13

Completion date

Unknown

Last updated

2025-04-07

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

Conditions

Physical inactivity, overweight E66

Interventions

Group 1: Substudy I (TK-FitnessCoaching): Intervention Group: 12-week web-based TK-FitnessCoaching Group 2: Substudy I (TK-FitnessCoaching): Control Group: Health-related knowledge transfer about phys

Eligibility

Sex/Gender

All

Age

18 Years to 65 Years

Inclusion criteria

Inclusion criteria: Substudy I (TK-FitnessCoaching): age: 18-65 years, sex: male/female, BMI: 18,5 - 34,9 kg/m2 (normal weight - obesity I), in case of health problems/illnesses: medical certificate, willing to be randomized, physical activity: = 60 min/week; Substudy II (TK-WeightLossCoaching): age: 18-65 years, sex: male/female, BMI: 27,5 - 34,9 kg/m2 (overweight - obesity I), in case of health problems/illnesses: medical certificate, willing to be randomized

Exclusion criteria

Exclusion criteria: Substudy I (TK-FitnessCoaching): age: 65 years, BMI: 60 min/week; Substudy II (TK-WeightLossCoaching): age: 65 years, BMI: < 27.5 kg/m2 (underweight/normal weight), = 35 kg/m2 (obesity II), health problems/illnesses excluding study participation partially or completely, pregnancy or breastfeeding

Design outcomes

Primary

Measure	Time frame
Substudy I (TK-FitnessCoaching): physical fitness: maximal oxygen uptake (spiroergometry, cooper test), isometric maximum force (force plate, handgrip) (U1, U4); Substudy II (TK-WeightLossCoaching): body weight, body fat percentage (BIA) (U1, U2, U3, U4) U1: 0 weeks U2: after 4 weeks U3: after 8 weeks U4: after 12 weeks	—

Secondary

Measure	Time frame
Substudy I (TK-FitnessCoaching): physical activity (Fitbit Charge 3, BSA 3.0, IPAQ) (U1, U2, U3, U4), motivation for physical activity by activity tracker (ATFB) (U4), nutrition (protocol, FEG) (U1, U2, U3, U4), anthropometry (BIA, measuring tape) (U1, U2, U3, U4), blood pressure (electronic device) (U1, U2, U3, U4), blood values (blood uptake) (U1, U4), endothelial function (Angiodefender) (U1, U4), feasibility (recruitment, retention, adherence, satisfaction (CSQ-I)) (U4); Substudy II (TK-WeightLossCoaching): nutrition (protocol, FEG) (U1, U2, U3, U4), physical activity (Fitbit Charge 3, BSA 3.0, IPAQ) (U1, U2, U3, U4), motivation for physical activity by activity tracker (ATFB) (U4), anthropometry (BIA, measuring tape) (U1, U2, U3, U4), blood pressure (eletronic device) (U1, U2, U3, U4), blood values (blood uptake) (U1, U4), endothelial function (Angiodefender) (U1, U4), feasibility (recruitment, retention, adherence, satisfaction (CSQ-I)) (U4) U1: 0 weeks U2: after 4 weeks U3: after 8 weeks U4: after 12 weeks	—

Measure

Time frame

Substudy I (TK-FitnessCoaching): physical activity (Fitbit Charge 3, BSA 3.0, IPAQ) (U1, U2, U3, U4), motivation for physical activity by activity tracker (ATFB) (U4), nutrition (protocol, FEG) (U1, U2, U3, U4), anthropometry (BIA, measuring tape) (U1, U2, U3, U4), blood pressure (electronic device) (U1, U2, U3, U4), blood values (blood uptake) (U1, U4), endothelial function (Angiodefender) (U1, U4), feasibility (recruitment, retention, adherence, satisfaction (CSQ-I)) (U4); Substudy II (TK-WeightLossCoaching): nutrition (protocol, FEG) (U1, U2, U3, U4), physical activity (Fitbit Charge 3, BSA 3.0, IPAQ) (U1, U2, U3, U4), motivation for physical activity by activity tracker (ATFB) (U4), anthropometry (BIA, measuring tape) (U1, U2, U3, U4), blood pressure (eletronic device) (U1, U2, U3, U4), blood values (blood uptake) (U1, U4), endothelial function (Angiodefender) (U1, U4), feasibility (recruitment, retention, adherence, satisfaction (CSQ-I)) (U4) U1: 0 weeks U2: after 4 weeks U3: after 8 weeks U4: after 12 weeks

—

Countries

Germany

Contacts

Public ContactJudith Brame

Albert-Ludwigs-Universität Freiburg, Institut für Sport und Sportwissenschaft

judith.brame@sport.uni-freiburg.de0761-203-54087

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 11, 2026