<clinical_study>
  <!-- This xml conforms to an XML Schema at:
    https://clinicaltrials.gov/ct2/html/images/info/public.xsd -->
  <required_header>
    <download_date>ClinicalTrials.gov processed this data on September 20, 2023</download_date>
    <link_text>Link to the current ClinicalTrials.gov record.</link_text>
    <url>https://clinicaltrials.gov/ct2/show/NCT04463186</url>
  </required_header>
  <id_info>
    <org_study_id>RRC-2019-05</org_study_id>
    <nct_id>NCT04463186</nct_id>
  </id_info>
  <brief_title>Time Based Effects of Different Duration Stretching on Calf Muscle Strength</brief_title>
  <official_title>Time-based Effects of Different Duration Stretching on Calf Muscle Strength</official_title>
  <sponsors>
    <lead_sponsor>
      <agency>King Saud University</agency>
      <agency_class>Other</agency_class>
    </lead_sponsor>
  </sponsors>
  <source>King Saud University</source>
  <oversight_info>
    <has_dmc>No</has_dmc>
    <is_fda_regulated_drug>No</is_fda_regulated_drug>
    <is_fda_regulated_device>No</is_fda_regulated_device>
  </oversight_info>
  <brief_summary>
    <textblock>
      Stretching is reported to decrease muscle strength and thus suggested to be avoided prior to&#xD;
      athletic events but with conflicting reports. This time course study aimed to assess acute&#xD;
      effects of static stretching of different durations on isometric maximum voluntary&#xD;
      contraction force of calf muscle.&#xD;
    </textblock>
  </brief_summary>
  <detailed_description>
    <textblock>
      Stretching is reported to decrease muscle strength and thus suggested to be avoided prior to&#xD;
      athletic events but with conflicting reports. This time course study aimed to assess acute&#xD;
      effects of static stretching of different durations on isometric maximum voluntary&#xD;
      contraction force of calf muscle. Pretest posttest experimental design was used. 14 subjects&#xD;
      participated in three experimental trials: Static stretching for 2 minutes (SS2), static&#xD;
      stretching for 4 minutes (SS4), and static stretching for 8 minutes (SS8). Strength was&#xD;
      measured before (pre), immediately after (post), and at 10- and 20- minutes post stretching.&#xD;
      Each static stretching (SS) trial involved varied repetitions of 30-seconds self-stretches&#xD;
      and 20-seconds relax periods.&#xD;
    </textblock>
  </detailed_description>
  <overall_status>Completed</overall_status>
  <start_date type="Actual">January 30, 2019</start_date>
  <completion_date type="Actual">August 29, 2019</completion_date>
  <primary_completion_date type="Actual">August 13, 2019</primary_completion_date>
  <phase>N/A</phase>
  <study_type>Interventional</study_type>
  <has_expanded_access>No</has_expanded_access>
  <study_design_info>
    <allocation>N/A</allocation>
    <intervention_model>Single Group Assignment</intervention_model>
    <intervention_model_description>Subjects participated in three experimental trials: Static stretching for 2 minutes (SS2), static stretching for 4 minutes (SS4), and static stretching for 8 minutes (SS8). Strength was measured before (pre), immediately after (post), and at 10- and 20- minutes post stretching.</intervention_model_description>
    <primary_purpose>Other</primary_purpose>
    <masking>None (Open Label)</masking>
  </study_design_info>
  <primary_outcome>
    <measure>Change in Isometric Maximum Voluntary Contraction Force</measure>
    <time_frame>MVCF at baseline and 0, 10, 20-min post stretching</time_frame>
    <description>Isometric Maximum Voluntary Contraction Force was measured using strain Gauge.</description>
  </primary_outcome>
  <number_of_arms>1</number_of_arms>
  <enrollment type="Actual">14</enrollment>
  <condition>Muscle Strength</condition>
  <arm_group>
    <arm_group_label>Experimental</arm_group_label>
    <arm_group_type>Experimental</arm_group_type>
    <description>subjects participated in three experimental trials: Static stretching for 2 minutes (SS2), static stretching for 4 minutes (SS4), and static stretching for 8 minutes (SS8). Strength was measured before (pre), immediately after (post), and at 10- and 20- minutes post stretching.</description>
  </arm_group>
  <intervention>
    <intervention_type>Other</intervention_type>
    <intervention_name>Muscle Static Stretching</intervention_name>
    <description>Static stretching for 2 minutes (SS2), static stretching for 4 minutes (SS4), and static stretching for 8 minutes (SS8). Each static stretching (SS) trial involved varied repetitions of 30-seconds self-stretches and 20-seconds relax periods.</description>
    <arm_group_label>Experimental</arm_group_label>
  </intervention>
  <eligibility>
    <criteria>
      <textblock>
        Inclusion Criteria:&#xD;
&#xD;
          -  Subjects performed active foot dorsiflexion in long sitting position with back&#xD;
             supported against wall and those having not more than 20-degree range of motion were&#xD;
             selected&#xD;
&#xD;
          -  Used to engage in 1 to 5 hours of physical activity per week&#xD;
&#xD;
        Exclusion Criteria:&#xD;
&#xD;
          -  Subjects having any current injury or limits in range of motion specific to lower limb&#xD;
             joints&#xD;
&#xD;
          -  Current neuromuscular disease&#xD;
&#xD;
          -  Competitive athletes were excluded from the study&#xD;
      </textblock>
    </criteria>
    <gender>All</gender>
    <minimum_age>24 Years</minimum_age>
    <maximum_age>30 Years</maximum_age>
    <healthy_volunteers>Accepts Healthy Volunteers</healthy_volunteers>
  </eligibility>
  <location>
    <facility>
      <name>King Saud University</name>
      <address>
        <city>Riyadh</city>
        <zip>11433</zip>
        <country>Saudi Arabia</country>
      </address>
    </facility>
  </location>
  <location_countries>
    <country>Saudi Arabia</country>
  </location_countries>
  <verification_date>July 2020</verification_date>
  <study_first_submitted>July 5, 2020</study_first_submitted>
  <study_first_submitted_qc>July 8, 2020</study_first_submitted_qc>
  <study_first_posted type="Actual">July 9, 2020</study_first_posted>
  <last_update_submitted>July 8, 2020</last_update_submitted>
  <last_update_submitted_qc>July 8, 2020</last_update_submitted_qc>
  <last_update_posted type="Actual">July 9, 2020</last_update_posted>
  <responsible_party>
    <responsible_party_type>Principal Investigator</responsible_party_type>
    <investigator_affiliation>King Saud University</investigator_affiliation>
    <investigator_full_name>Masood Khan</investigator_full_name>
    <investigator_title>Principal investigator</investigator_title>
  </responsible_party>
  <keyword>Muscle strength</keyword>
  <keyword>muscle stretching exercises</keyword>
  <keyword>Calf Muscle</keyword>
  <patient_data>
    <sharing_ipd>Undecided</sharing_ipd>
  </patient_data>
  <!-- Results have not yet been posted for this study                                          -->
</clinical_study>


download date: ClinicalTrials.gov processed this data on September 20, 2023
link text: Link to the current ClinicalTrials.gov record.
url: https://clinicaltrials.gov/ct2/show/NCT04463186
org study id: RRC-2019-05
nct id: NCT04463186
lead sponsor: 
has dmc: No
is fda regulated drug: No
is fda regulated device: No
Stretching is reported to decrease muscle strength and thus suggested to be avoided prior to
      athletic events but with conflicting reports. This time course study aimed to assess acute
      effects of static stretching of different durations on isometric maximum voluntary
      contraction force of calf muscle.
Stretching is reported to decrease muscle strength and thus suggested to be avoided prior to
      athletic events but with conflicting reports. This time course study aimed to assess acute
      effects of static stretching of different durations on isometric maximum voluntary
      contraction force of calf muscle. Pretest posttest experimental design was used. 14 subjects
      participated in three experimental trials: Static stretching for 2 minutes (SS2), static
      stretching for 4 minutes (SS4), and static stretching for 8 minutes (SS8). Strength was
      measured before (pre), immediately after (post), and at 10- and 20- minutes post stretching.
      Each static stretching (SS) trial involved varied repetitions of 30-seconds self-stretches
      and 20-seconds relax periods.
allocation: N/A
intervention model: Single Group Assignment
intervention model description: Subjects participated in three experimental trials: Static stretching for 2 minutes (SS2), static stretching for 4 minutes (SS4), and static stretching for 8 minutes (SS8). Strength was measured before (pre), immediately after (post), and at 10- and 20- minutes post stretching.
primary purpose: Other
masking: None (Open Label)
measure: Change in Isometric Maximum Voluntary Contraction Force
time frame: MVCF at baseline and 0, 10, 20-min post stretching
description: Isometric Maximum Voluntary Contraction Force was measured using strain Gauge.
arm group label: Experimental
arm group type: Experimental
description: subjects participated in three experimental trials: Static stretching for 2 minutes (SS2), static stretching for 4 minutes (SS4), and static stretching for 8 minutes (SS8). Strength was measured before (pre), immediately after (post), and at 10- and 20- minutes post stretching.
intervention type: Other
intervention name: Muscle Static Stretching
description: Static stretching for 2 minutes (SS2), static stretching for 4 minutes (SS4), and static stretching for 8 minutes (SS8). Each static stretching (SS) trial involved varied repetitions of 30-seconds self-stretches and 20-seconds relax periods.
arm group label: Experimental
criteria: 
gender: All
minimum age: 24 Years
maximum age: 30 Years
healthy volunteers: Accepts Healthy Volunteers
facility: 
country: Saudi Arabia
responsible party type: Principal Investigator
investigator affiliation: King Saud University
investigator full name: Masood Khan
investigator title: Principal investigator
sharing ipd: Undecided