Healthy
Conditions
Keywords
Physical Activity, Exercise, Mental Health, Health Behaviour, Electromyostimulation, EMS, Strength Training
Brief summary
The study investigates the midterm, longterm and acute psychological and physical effects of an 8-week whole-body-workout using Electromyostimulation (EMS) in healthy individuals.
Detailed description
EMS-whole-body-workouts are less time-consuming and effort-intensive but generate physical effects which are comparable to conventional strength training. Therefore EMS could lower the barrier to physical activity. The present study focusses on psychological and physical effects of an 8-week EMS workout. Physical activity is notably important for mental and physical health, but is on average far too rarely implemented. Therefore EMS-whole-body-workouts could provide an opportunity to generate positive psychological and physical effects through a less (subjective) cost-intense strength training.
Interventions
DEVICEElectromyostimulation Whole-Body-Workout
Electromyostimulation - intensity 5 (muscle stimulation)
DEVICEElectromyostimulation Sham Whole-Body-Workout
Electromyostimulation - intensity 0 (no muscle stimulation)
Sponsors
miha bodytec GmbH
Charite University, Berlin, Germany
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Outcomes Assessor)
Masking description
Participants and Outcomes Assessors are not aware of the study hypothesis / the condition.
Intervention model description
The study has a randomised placebo-controlled parallel design (two arms: experimental-condition, sham-condition).
Eligibility
Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
Yes
Inclusion criteria
* Subject familiarized with experimental procedure and had given written informed consent * Able to understand German * Reachability of participant for the eight training sessions
Exclusion criteria
* Contraindications for physical exercise or EMS-use * Current EMS-use or intense regular exercise (\> 60 min / week) * Pregnancy * Current presence of any mental disease * Acute suicidality * Substance dependencies with actual consumption (except nicotine)
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Acute change of subjective well-being. | From directly before each of the eight training sessions do directly after each of the sessions (EMS-Training/Sham) during the 8 weeks of training. | • Subjective well-being is measured using a visual analogue scale (0-100%, higher value = better outcome). |
| Acute change of subjective relaxation. | From directly before each of the eight training sessions do directly after each of the sessions (EMS-Training/Sham) during the 8 weeks of training. | • Subjective relaxation is measured using a visual analogue scale (0-100%, higher value = better outcome). |
| Change of acute symptoms of anxiety and depression. | From directly before each of the eight training sessions do directly after each of the sessions (EMS-Training/Sham) during the 8 weeks of training. | • The State-Scale of the State-Trait-Anxiety-Depression-Inventar (STADI-State; Renner, Hock, Bergner-Köther & Laux, 2018) is used to assess acute symptoms of depression and anxiety. The raw score ranges from 10 to 40, higher values indicate a worse outcome. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Mid-/longterm changes in positive and negative affect. | Baseline (before any training) + Intermediate (4 weeks) + Post (8 weeks) + Follow-Up (12 weeks). | • Positive and Negative Affect Schedule (PANAS; Watson, Clark & Tellegen, 1988). Positive subscale: Scores ranging from 10 to 50, higher scores represent a better outcome. Negative subscale: Scores ranging from 10 to 50, higher scores represent a worse outcome. |
| Change in general self-efficacy | Baseline (before any training) + Intermediate (4 weeks) + Post (8 weeks) + Follow-Up (12 weeks). | • General self-efficacy is measured using the General-Self-Efficacy Scale (GSE) by Jerusalem & Schwarzer (1981). The GSE has 10 likert scaled items with values ranging from 1 to 4, higher scores mean a better outcome. |
| Change in attitudes regarding physical activity (intentions for physical activity, self-efficacy regarding physical activity) | Baseline (before any training) + Intermediate (4 weeks) + Post (8 weeks) + Follow-Up (12 weeks). | • Intention (4 items) and self-efficacy (2 items) are measured using six likert scaled items by Petzold et al. (2017). Values ranging from 1 to 4, higher scores mean a better outcome. |
| Mid-/longterm changes in depressive symptoms. | Baseline (before any training) + Intermediate (4 weeks) + Post (8 weeks) + Follow-Up (12 weeks). | • Patient Health Questionnaire (PHQ-9; Kroenke & Spitzer, 2002). Sum scores ranging from 0 to 27, higher values indicate a worse outcome. |
| Change in physical parameters: hand force. | Baseline (before any training) + Intermediate (4 weeks) + Post (8 weeks) + Follow-Up (12 weeks). | • Hand force is measured with a hand-dynamometer left and right hand. |
| Change in physical parameters: leg strength. | Baseline (before any training) + Intermediate (4 weeks) + Post (8 weeks) + Follow-Up (12 weeks). | • Leg strength is assessed using the 30-second chair-stand-test. |
| Change in physical parameters: heart rate variability. | Baseline (before any training) + Intermediate (4 weeks) + Post (8 weeks) + Follow-Up (12 weeks). | • Heart rate variability is measured with a polar chest strap during 5 minutes of relaxation. |
| Mid-/longterm changes in anxiety symptoms. | Baseline (before any training) + Intermediate (4 weeks) + Post (8 weeks) + Follow-Up (12 weeks). | • Generalized Anxiety Disorder Scale (GAD-7; Spitzer, Kroenke, Williams & Löwe, 2006). Sum scores ranging from 0 to 21, higher values indicate a worse outcome. |
| Mid-/longterm changes in affect-related psychological variables. | Baseline (before any training) + Intermediate (4 weeks) + Post (8 weeks) + Follow-Up (12 weeks). | • The Trait-Scale of the State-Trait-Anxiety-Depression-Inventar (STADI-Trait; Renner, Hock, Bergner-Köther & Laux, 2018) is used to assess symptoms of depression and anxiety. The raw score ranges from 10 to 40, higher values indicate a worse outcome. |
Countries
Germany
Contacts
Primary ContactAntonia Bendau, M.Sc.Psych.
Backup ContactAndreas Ströhle, Prof.Dr.
Outcome results
None listed