Sedentary AdultsNCT07872566
Effects of Flexi-Bar Training in Different Postures on Core Muscle Activation, Trunk Muscle Strength, and Balance in Sedentary Adults
A study testing Flexi-Bar training with sitting posture and Flexi-Bar training with standing posture in people with Sedentary Adults, run by Fooyin University at 1 site in Taiwan.
Trial summary
Trunk stability is a fundamental basis for achieving proximal stability and facilitating distal mobility, and is closely associated with balance control and neuromuscular coordination. Read more about this study
- Who is it for?
- Ages 18 to 25 yearsHealthy volunteers can take part
- Conditions the study is for
- Sedentary Adults
- What is being tested?
- Flexi-Bar training with sitting posture and Flexi-Bar training with standing posture
- Type of treatment
- Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 60 participants
- Where
- 1 siteTaiwan
- Study dates
- 21 Sep 2026to 30 Sep 2027
- Phase
- Interventional
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 25 years
- All sexes
- Healthy volunteers accepted
- Adult
Who may be able to join
- Aged 18-25 years and currently enrolled as university students.
- Classified as having a low level of physical activity based on the International Physical Activity Questionnaire (IPAQ), with a total physical activity level of <600 MET-min/week.
- Reported a daily sitting time of ≥6 hours.
- Did not participate in any other core stability or balance training during the study period.
- Had no known neurological disorders, such as stroke, traumatic brain injury, or Parkinson's disease.
- Had no musculoskeletal injuries involving the lower extremities or spine within the previous 6 months.
Who cannot join
- Develop discomfort, pain, or other safety concerns during the study period and are assessed by the research team as being unsuitable for continued participation.
- Are unable to fully comply with or complete the study intervention or assessment procedures.
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
Taiwan1 site, 1 recruiting
- Recruiting
Fooyin University
Kaohsiung City, Daliao Dist., 831
I-Hsuan Chen, +886-929130306, cellomd@gmail.com
About this study
Official title: Effects of Flexi-Bar Training in Different Postures on Core Muscle Activation, Trunk Muscle Strength, and Balance in Sedentary Adults: A Randomized Controlled Trial
Trunk stability is a fundamental basis for achieving proximal stability and facilitating distal mobility, and is closely associated with balance control and neuromuscular coordination. This study aimed to investigate the effects of Flexi-Bar training performed in different postures on core muscle activation, trunk muscle strength, and balance in sedentary adults. The findings are expected to provide a preliminary foundation for future application in populations with impaired trunk control and poor balance, such as individuals with stroke.
This study will recruite 60 sedentary university students who were randomly assigned to an experimental group (sitting position) or a control group (standing position). The intervention consisted of standardized Flexi-Bar training twice a week, 35 minutes per session, for four weeks. Outcome measures included trunk muscle strength assessed using a handheld dynamometer (MicroFET3), core muscle activation assessed using surface electromyography (sEMG), and static and dynamic balance assessed using the TYMO balance platform and the Y-Balance Test, respectively.
- Conditions
- Sedentary Adults
- Being tested
- Flexi-Bar training with sitting posture, Flexi-Bar training with standing posture
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Flexi-Bar training with sitting postureBehavioural
The intervention consisted of standardized Flexi-Bar training with sitting posture twice a week, 35 minutes per session, for four weeks.
Flexi-Bar training with standing postureBehavioural
The intervention consisted of standardized Flexi-Bar training with standing posture twice a week, 35 minutes per session, for four weeks.
| Study group | Role | What they receive |
|---|---|---|
| Sitting | Experimental | Not described Receives: Behavioral: Flexi-Bar training with sitting posture |
| Standing | Active comparator | Not described Receives: Behavioral: Flexi-Bar training with standing posture |
What is being measured
The primary outcome is the main question the study is designed to answer.
Muscle strength (trunk flexors)
Muscle strength will be measured using a handheld dynamometer (MicroFET3; Hoggan Health Industries, Salt Lake City, UT, USA).
Measured: 1. baseline, pre-intervention 2. immediately after the intervention
Muscle strength (trunk extensors)
Muscle strength will be measured using a handheld dynamometer (MicroFET3; Hoggan Health Industries, Salt Lake City, UT, USA).
Measured: 1. baseline, pre-intervention 2. immediately after the intervention
Muscle strength (Trunk rotator muscles)
Muscle strength will be measured using a handheld dynamometer (MicroFET3; Hoggan Health Industries, Salt Lake City, UT, USA).
Measured: 1. baseline, pre-intervention 2. immediately after the intervention
Muscle strength (Trunk lateral flexor muscles)
Muscle strength will be measured using a handheld dynamometer (MicroFET3; Hoggan Health Industries, Salt Lake City, UT, USA).
Measured: 1. baseline, pre-intervention 2. immediately after the intervention
Static balance
Static balance was assessed using the TYMO balance platform to monitor center of pressure (COP) trajectory. Testing positions includes 4 conditions: 1. Standing with eyes open 2. Standing with eyes closed 3. Standing on a foam surface with eyes open 4. Standing on a foam with eyes closed. After each trial, the system automatically calculated the COP trajectory.
Measured: 1. baseline, pre-intervention 2. immediately after the intervention
Dynamic balance
Dynamic balance was assessed using the Limits of Stability (LOS) test to evaluate the ability to actively shift the center of mass. Participants will be instructed to maintain an upright posture without moving their feet and to shift their center of mass as far as possible in eight directions. After each trial, the system automatically calculated the dynamic balance score.
Measured: 1. baseline, pre-intervention 2. immediately after the intervention
Y balance test
Participants performed a single-leg stance while reaching with the contralateral leg in three directions: anterior, posteromedial, and posterolateral. The maximum reach distance in each direction was recorded and normalized to leg length. A composite score was calculated to represent overall dynamic balance performance.
Measured: 1. baseline, pre-intervention 2. immediately after the intervention
Secondary outcomes (3)
EMG activity (µV) of rectus abdominis during performing balance task
EMG activity (µV) of rectus abdominis during performing balance task will be recorded using the commercially wireless system (Delsys Inc., United States).
Measured: 1. baseline, pre-intervention 2. immediately after the intervention
EMG activity (µV) of external oblique during performing balance task
EMG activity (µV) of external oblique during performing balance task will be recorded using the commercially wireless system (Delsys Inc., United States).
Measured: 1. baseline, pre-intervention 2. immediately after the intervention
EMG activity (µV) of erector spinae
EMG activity (µV) of erector spinae during performing balance task will be recorded using the commercially wireless system (Delsys Inc., United States).
Measured: 1. baseline, pre-intervention 2. immediately after the intervention
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted13 Oct 2026
- Study start21 Sep 2026
- Primary completion30 Sep 2027 (estimated)
- Study completion30 Sep 2027 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Sedentary AdultsStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Who is masked
- Outcomes assessor
- Enrolment
- 60 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Fooyin University
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07872566
- Sponsor's protocol ID
- 115-0324
- Status last verified
- Sep 2026
- First submitted
- 24 Sep 2026
- Last updated
- 13 Oct 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 13 Oct 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Effects of Flexi-Bar Training in Different Postures on Core Muscle Activation, Trunk Muscle Strength, and Balance in Sedentary Adults: A Randomized Controlled Trial
- ClinicalTrials.gov ID
- NCT07872566
- Acronym / sponsor ID
- 115-0324
- Conditions
- Sedentary Adults
- Study type
- Interventional
- Recruitment status
- Recruiting
- Enrolment
- 60 participants (estimated)
- Lead sponsor
- Fooyin UniversityUniversity, hospital or other
- Study start
- 21 Sep 2026 (actual)
- Primary completion
- 30 Sep 2027 (estimated)
- Study completion
- 30 Sep 2027 (estimated)
- First posted
- 13 Oct 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Trunk stability is a fundamental basis for achieving proximal stability and facilitating distal mobility, and is closely associated with balance control and neuromuscular coordination. This study aimed to investigate the effects of Flexi-Bar training performed in different postures on core muscle activation, trunk muscle strength, and balance in sedentary adults. The findings are expected to provide a preliminary foundation for future application in populations with impaired trunk control and poor balance, such as individuals with stroke.
This study will recruite 60 sedentary university students who were randomly assigned to an experimental group (sitting position) or a control group (standing position). The intervention consisted of standardized Flexi-Bar training twice a week, 35 minutes per session, for four weeks. Outcome measures included trunk muscle strength assessed using a handheld dynamometer (MicroFET3), core muscle activation assessed using surface electromyography (sEMG), and static and dynamic balance assessed using the TYMO balance platform and the Y-Balance Test, respectively.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Sitting | Experimental | Behavioral: Flexi-Bar training with sitting posture |
| Standing | Active comparator | Behavioral: Flexi-Bar training with standing posture |
Who may qualify
- Ages
- 18 to 25 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (6 listed)
- Aged 18-25 years and currently enrolled as university students.
- Classified as having a low level of physical activity based on the International Physical Activity Questionnaire (IPAQ), with a total physical activity level of <600 MET-min/week.
- Reported a daily sitting time of ≥6 hours.
- Did not participate in any other core stability or balance training during the study period.
- Had no known neurological disorders, such as stroke, traumatic brain injury, or Parkinson's disease.
Key exclusion criteria (2 listed)
- Develop discomfort, pain, or other safety concerns during the study period and are assessed by the research team as being unsuitable for continued participation.
- Are unable to fully comply with or complete the study intervention or assessment procedures.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Flexi-Bar training with sitting postureThe intervention consisted of standardized Flexi-Bar training with sitting posture twice a week, 35 minutes per session, for four weeks. | Behavioural | Sitting |
| Flexi-Bar training with standing postureThe intervention consisted of standardized Flexi-Bar training with standing posture twice a week, 35 minutes per session, for four weeks. | Behavioural | Standing |
Primary outcome
Muscle strength (trunk flexors)
Time frame: 1. baseline, pre-intervention 2. immediately after the intervention
Muscle strength will be measured using a handheld dynamometer (MicroFET3; Hoggan Health Industries, Salt Lake City, UT, USA).
Muscle strength (trunk extensors)
Time frame: 1. baseline, pre-intervention 2. immediately after the intervention
Muscle strength will be measured using a handheld dynamometer (MicroFET3; Hoggan Health Industries, Salt Lake City, UT, USA).
Muscle strength (Trunk rotator muscles)
Time frame: 1. baseline, pre-intervention 2. immediately after the intervention
Muscle strength will be measured using a handheld dynamometer (MicroFET3; Hoggan Health Industries, Salt Lake City, UT, USA).
Muscle strength (Trunk lateral flexor muscles)
Time frame: 1. baseline, pre-intervention 2. immediately after the intervention
Muscle strength will be measured using a handheld dynamometer (MicroFET3; Hoggan Health Industries, Salt Lake City, UT, USA).
Static balance
Time frame: 1. baseline, pre-intervention 2. immediately after the intervention
Static balance was assessed using the TYMO balance platform to monitor center of pressure (COP) trajectory. Testing positions includes 4 conditions: 1. Standing with eyes open 2. Standing with eyes closed 3. Standing on a foam surface with eyes open 4. Standing on a foam with eyes closed. After each trial, the system automatically calculated the COP trajectory.
Dynamic balance
Time frame: 1. baseline, pre-intervention 2. immediately after the intervention
Dynamic balance was assessed using the Limits of Stability (LOS) test to evaluate the ability to actively shift the center of mass. Participants will be instructed to maintain an upright posture without moving their feet and to shift their center of mass as far as possible in eight directions. After each trial, the system automatically calculated the dynamic balance score.
Y balance test
Time frame: 1. baseline, pre-intervention 2. immediately after the intervention
Participants performed a single-leg stance while reaching with the contralateral leg in three directions: anterior, posteromedial, and posterolateral. The maximum reach distance in each direction was recorded and normalized to leg length. A composite score was calculated to represent overall dynamic balance performance.
3 secondary outcomes
EMG activity (µV) of rectus abdominis during performing balance task
Time frame: 1. baseline, pre-intervention 2. immediately after the intervention
EMG activity (µV) of external oblique during performing balance task
Time frame: 1. baseline, pre-intervention 2. immediately after the intervention
EMG activity (µV) of erector spinae
Time frame: 1. baseline, pre-intervention 2. immediately after the intervention
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 13 Oct 2026.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Flexi-Bar training with sitting posture and Flexi-Bar training with standing posture in people with Sedentary Adults, run by Fooyin University at 1 site in Taiwan.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 6 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 13 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Taiwan. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Each site lists its own contact: choose the nearest one under Trial locations. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Muscle strength (trunk flexors) (time frame: 1. baseline, pre-intervention 2. immediately after the intervention). The study lists 7 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 13 Oct 2026.