The effect of ankle muscle fatigue on postural control and muscular activation patterns

The effect of plantar flexor muscle fatigue on postural control and muscular activation pattern during external perturbation in healthy students (20-35 Y/O) of Shiraz Rehabilitation School

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

IRCT

Registry ID

IRCT201109196767N1

Enrollment

Registered

2011-10-12

Start date

2011-10-22

Completion date

Unknown

Last updated

2018-02-22

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

Conditions

Normal subjects.

Interventions

Intervention 1: External perturbation (expected and unexpected): Subjects expose to a rapid loading in to the right palm (25% of body weight) from 20 cm obove his/har right palm, while the shoulder is

The person will asked to apply pressure to the strap while maintain 60 percent of his/her maximum voluntary contraction by looking at the bar scale on the monitor until feel fatigue. When the bar scal

Diagnosis

External perturbation (expected and unexpected): Subjects expose to a rapid loading in to the right palm (25% of body weight) from 20 cm obove his/har right palm, while the shoulder is in 90 flexion.

Making the plantar flexor muscles fatigued: The person sitting on the bed with the thigh and leg on the it. One end of the load cell strap will be fixed to the bar behind the person and the other end

Eligibility

Sex/Gender

All

Age

20 Years to 35 Years

Inclusion criteria

Inclusion criteria: Inclusion criteria: Healthy students aged 20-35 years old Exclusion criteria: Any deviation in the lower extremities and spine alignment; History of pain and trauma to the lower extremities and trunk in the past six months; Musculoskeletal and neuromuscular disorders; History of diseases that involve vestibular system, eyes, central nervous system and peripheral nervous system; Inner ear disease; History of surgery in the lower extremities and trunk; History of back pain in past 6 months; Doing regular exercise at least 3 times a week for 30-45 minutes

Exclusion criteria

Exclusion criteria:

Design outcomes

Primary

Measure	Time frame
Bilateral transverse abdominals muscle activation. Timepoint: Before and after expected and unexpected sudden hand loading (before and after plantar flexor muscle fatigue). Method of measurement: Telemetry EMG (Mega electronics Ltd.Finland).;Bilateral semitendinosus muscle activation. Timepoint: Before and after expected and un expected sudden hand loading (before and after plantar muscle fatigue). Method of measurement: Telemetry EMG (Mega electronics Ltd.Finland).;Center of pressure displacement. Timepoint: Before and after expected and unexpected sudden hand loading (before and after plantar flexor muscle fatigue). Method of measurement: Kistler force plate (9286AA,Sweden).;Center of pressure velocity. Timepoint: Before and after expected and unexpected sudden hand loading (before after plantar flexor muscle fatigue). Method of measurement: Kistler force plate (9286AA,Sweden).;Bilateral erector spinae muscle activation. Timepoint: Before and after expected and unexpected sudden hand loading (before and after plantar flexor muscle fatigue). Method of measurement: Telemetry EMG (Mega electronics Ltd.Finland).;Bilateral soleus muscle activation. Timepoint: Before and after expected and unexpected sudden hand loading (before and after plantar flexor muscle fatigue). Method of measurement: Telemetry EMG (Mega electronics Ltd.Finland).	—

Measure

Time frame

Bilateral transverse abdominals muscle activation. Timepoint: Before and after expected and unexpected sudden hand loading (before and after plantar flexor muscle fatigue). Method of measurement: Telemetry EMG (Mega electronics Ltd.Finland).;Bilateral semitendinosus muscle activation. Timepoint: Before and after expected and un expected sudden hand loading (before and after plantar muscle fatigue). Method of measurement: Telemetry EMG (Mega electronics Ltd.Finland).;Center of pressure displacement. Timepoint: Before and after expected and unexpected sudden hand loading (before and after plantar flexor muscle fatigue). Method of measurement: Kistler force plate (9286AA,Sweden).;Center of pressure velocity. Timepoint: Before and after expected and unexpected sudden hand loading (before after plantar flexor muscle fatigue). Method of measurement: Kistler force plate (9286AA,Sweden).;Bilateral erector spinae muscle activation. Timepoint: Before and after expected and unexpected sudden hand loading (before and after plantar flexor muscle fatigue). Method of measurement: Telemetry EMG (Mega electronics Ltd.Finland).;Bilateral soleus muscle activation. Timepoint: Before and after expected and unexpected sudden hand loading (before and after plantar flexor muscle fatigue). Method of measurement: Telemetry EMG (Mega electronics Ltd.Finland).

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Countries

Iran (Islamic Republic of)

Contacts

Public ContactDr Zahra Rojhani

Shiraz University of Medical Sciences

rojhaniz@sums.ac.ir+98 71 1627 1551

Outcome results

None listed

Source: IRCT (via WHO ICTRP) · Data processed: Feb 4, 2026