xml: <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/NCT05988762</url>
    </required_header>
    <id_info>
      <org_study_id>STUDY00004217</org_study_id>
      <nct_id>NCT05988762</nct_id>
    </id_info>
    <brief_title>Supramaximal Walkouts and Back Squat Performance</brief_title>
    <official_title>The Impact of Supramaximal Walkouts on Subsequent Back Squat Performance</official_title>
    <sponsors>
      <lead_sponsor>
        <agency>Florida State University</agency>
        <agency_class>Other</agency_class>
      </lead_sponsor>
    </sponsors>
    <source>Florida State 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>
        The goal of this randomized, counterbalanced, crossover study is to determine the&#xD;
        effectiveness of performing a supramaximal walkout on enhancing subsequent back squat&#xD;
        performance in trained lifters. The main question we aim to answer is whether bar velocity,&#xD;
        power output, perceived exertion, and muscle activation are altered when performing the back&#xD;
        squat exercise after a supramaximal walkout. On the first visit, participants will be&#xD;
        informed of the study protocols before providing oral and written informed consent.&#xD;
        Afterwards, participants will complete maximum voluntary isometric contraction (MVIC) testing&#xD;
        for the quadriceps and gluteus maximus muscle groups to generate a normalization for the&#xD;
        electromyography (EMG) measurements. During the second visit, participants will perform a 1RM&#xD;
        back squat. The third and fourth visits will be the experimental visits, where they will&#xD;
        perform either a supramaximal (110% 1RM) or submaximal (control; 30% 1RM) walkout. A set of 1&#xD;
        back squat at 92.5% 1RM will be performed prior to the walkout to serve as a baseline, then 3&#xD;
        sets of 1 at 92.5% 1RM will be performed afterwards.&#xD;
      </textblock>
    </brief_summary>
    <detailed_description>
      <textblock>
        Initial Visit Participants will be asked to arrive at the Institute of Sports Sciences &amp;&#xD;
        Medicine (ISSM) following a 3 h fasting period having abstained from alcohol for the previous&#xD;
        24 h and heavy lower body exercise for the previous 48 h. Participants will then be informed&#xD;
        of the study protocols and procedures before providing oral and written informed consent.&#xD;
        Following the signing of the informed consent document, participants will complete the PAR-Q+&#xD;
        to determine readiness for physical activity and an additional training history form to&#xD;
        assess their previous experience with exercise and resistance training. After completion of&#xD;
        these documents, participants' blood pressure will be assessed via an automatic blood&#xD;
        pressure monitor (Omron, Kyoto, Japan). Next, height will be assessed to the nearest cm using&#xD;
        a wall-mounted scale (Seca, Hamburg, Germany). Participants will then be weighed to the&#xD;
        nearest 0.1 kg via an automated scale (Detecto® 750, Webb City, MO). Body composition will&#xD;
        then be assessed via BodPod (Cosmed, Chicago, IL).&#xD;
  &#xD;
        Following these baseline measurements, surface electromyography (EMG) will be used to assess&#xD;
        muscle activation. EMG electrodes (Noraxon, Arizona, USA) will be placed on the gluteus&#xD;
        maximus and vastus lateralis muscle groups of the participants' dominant side to measure&#xD;
        electrical potentials generated. Once the electrodes are in place, participants will complete&#xD;
        a 5-min warmup on a cycle ergometer at a self-selected easy to moderate intensity before&#xD;
        beginning maximum voluntary contraction (MVC) testing on an isokinetic dynamometer (Biodex&#xD;
        Multi-Joint System-PRO, Biodex Medical Systems, Inc., Shirley, NY, USA). Isometric knee&#xD;
        extension MVC torque will be measured with the knee joint flexed. The participant will test&#xD;
        the isometric measurement three times at submaximal levels, followed by three maximal&#xD;
        isometric contractions. Each contraction will last for 6 s and will be followed by 30 s rest.&#xD;
        EMG amplitudes generated during this contraction will be used for EMG normalization.&#xD;
        Following the testing on the dynamometer, participants will complete EMG normalization&#xD;
        testing for the gluteus maximus. To determine this, participants will lie prone on a bench&#xD;
        with their dominant knee flexed to 90°. Manual resistance will be applied to the distal thigh&#xD;
        as the participant is instructed to extend their hip. Similar to the dynamometer testing, the&#xD;
        participant will complete three submaximal repetitions followed by three maximal repetitions.&#xD;
  &#xD;
        Preliminary Visit For the preliminary visit, participants will arrive to the ISSM having&#xD;
        abstained from alcohol for the previous 24 h and heavy lower body exercise for the previous&#xD;
        72 h. Upon arrival, EMG electrodes will be applied to the same muscle groups as the initial&#xD;
        visit. Participants will then complete a standardized warm up consisting of 5 min on the&#xD;
        cycle ergometer at a self-selected easy to moderate pace, followed by a battery of dynamic&#xD;
        movements (air squats, lunges, etc.) used to prepare the participant for the back squat&#xD;
        exercise. Following this warm-up, participants will begin the 1RM back squat testing using a&#xD;
        modified National Strength and Conditioning Association (NSCA) protocol. A linear position&#xD;
        transducer system (Tendo Unit, Tendo Sports Machines, London, UK) will be attached to the&#xD;
        barbell to evaluate bar velocity during the back squat movement. Following completion of the&#xD;
        1RM protocol, participants will perform a 5 min active recovery (cycle ergometer).&#xD;
  &#xD;
        Experimental Visits For the experimental visits, participants will arrive to the ISSM a&#xD;
        minimum of 72 h following the previous visit and having abstained from alcohol for the&#xD;
        previous 24 h and heavy lower body exercise for the previous 72 h. Prior to testing, the EMG&#xD;
        electrodes will be placed on the specific muscle groups and the linear position transducer&#xD;
        will be attached to the barbell. The participants will begin by completing the same&#xD;
        standardized warm up from the previous visit. After the standardized warm-up, participants&#xD;
        will begin a specific warm-up with the back squat. The participant will first complete 8&#xD;
        repetitions at 30% of their target load (92.5% 1RM). After a 3 min rest, the participant will&#xD;
        complete 5 repetitions @ 50% of their target load. After another 3 min rest, the participant&#xD;
        will complete 3 repetitions at 70% of target load followed by another 3 min rest and the&#xD;
        final warm-up set of 1 repetition @ 85% of target load. After a 5 min rest, the participants&#xD;
        will then complete one repetition at 92.5% 1RM. Participants will be instructed to perform&#xD;
        this set with maximum effort. Following a 5 min rest, the participants will then perform&#xD;
        either the supramaximal or submaximal (control) walkout. Both walkouts will consist of the&#xD;
        participant un-racking the bar and stepping back to get set up into their starting squat&#xD;
        position. Instead of performing the squat, the participant will remain standing in place for&#xD;
        10 s before returning the bar to the rack. The supramaximal walkout will be performed at 110%&#xD;
        1RM while the control walkout will be performed at 30% 1RM. Before this walkout set, the&#xD;
        weight on the bar will be covered with a black trash bag to blind the participant as to which&#xD;
        trial they are in. This will negate any anticipatory effects leading up to the walkout. Then,&#xD;
        immediately before the participant lifts the bar off the rack, the researchers will indicate&#xD;
        whether the weight is light or heavy to avoid issues when un-racking the bar. After the&#xD;
        walkout, the participant will rest for 5 min, followed by 3 sets of 1 repetition at 92.5% 1RM&#xD;
        with 5 min rest between each set. Participants will be instructed to perform these sets at&#xD;
        maximum velocity. Following the final set, participants will perform a 5 min active recovery&#xD;
        (cycle ergometer).&#xD;
  &#xD;
        Standardization of Diet and Training Prior to each experimental trial, participants will be&#xD;
        asked to maintain consistent nutritional (dietary and supplementation) habits for the day&#xD;
        preceding the experimental trial and the day of the experimental trial. Additionally,&#xD;
        participants will be asked to avoid any lower body resistance exercise for the 72 h leading&#xD;
        up to the experimental trial. To ensure compliance, participants will be asked to complete a&#xD;
        48-h dietary intake form (attached) and a 72-h exercise log (attached) for the days preceding&#xD;
        the experimental trial. Finally, participants will be asked to abstain from any alcohol for&#xD;
        24 h prior to the experimental trial.&#xD;
  &#xD;
        Bar Velocity, Muscle Activation, and RPE Peak and mean bar velocity (m/s) and power output&#xD;
        (W) will be assessed via a linear position transducer system (Tendo Sport Machines, Trencin,&#xD;
        Slovakia). The transducer system will be attached to the barbell prior to the onset of the&#xD;
        specific warm-up. The measurement will be made independently for each set and automatically&#xD;
        converted into values of peak power output and peak velocity.&#xD;
  &#xD;
        Surface electromyography (EMG) will be used to assess muscle activation during each set of&#xD;
        back squats. EMG electrodes (Noraxon, Arizona, USA) will be placed on the vastus lateralis&#xD;
        and gluteus maximus of the participants' dominant side after the skin is shaved, abraded, and&#xD;
        cleaned. The electrodes will be positioned longitudinally on the belly of each muscle. Data&#xD;
        will be collected telemetrically at 1000 Hz and subjected to full-wave rectification.&#xD;
        Baseline maximum EMG will be assessed during the maximal isometric torque assessment of the&#xD;
        initial visit. EMG data collected during the back squat sessions will be normalized to the&#xD;
        baseline EMG and presented as a percentage.&#xD;
  &#xD;
        Rating of perceived exertion (RPE) will be assessed using a modified Borg RPE scale&#xD;
        (attached). The participants will be familiarized with the scale prior to beginning the 1RM&#xD;
        protocol.&#xD;
      </textblock>
    </detailed_description>
    <overall_status>Recruiting</overall_status>
    <start_date type="Anticipated">August 1, 2023</start_date>
    <completion_date type="Anticipated">November 2023</completion_date>
    <primary_completion_date type="Anticipated">November 2023</primary_completion_date>
    <phase>N/A</phase>
    <study_type>Interventional</study_type>
    <has_expanded_access>No</has_expanded_access>
    <study_design_info>
      <allocation>Randomized</allocation>
      <intervention_model>Crossover Assignment</intervention_model>
      <primary_purpose>Other</primary_purpose>
      <masking>Single (Participant)</masking>
      <masking_description>Participants will not be told whether they are performing the supramaximal or submaximal walkout. Black trash bags will be used to cover the weights during the walkout set so that the participant cannot see which condition they are in.</masking_description>
    </study_design_info>
    <primary_outcome>
      <measure>Back Squat Velocity</measure>
      <time_frame>Baseline (5 minutes before walkout) and immediately after the walkout (3 sets with 5 minutes rest in between each set)</time_frame>
      <description>Peak and average concentric bar velocity (m/s)</description>
    </primary_outcome>
    <primary_outcome>
      <measure>Back Squat Power Output</measure>
      <time_frame>Baseline (5 minutes before walkout) and immediately after the walkout (3 sets with 5 minutes rest in between each set)</time_frame>
      <description>Peak and average concentric power output (W)</description>
    </primary_outcome>
    <primary_outcome>
      <measure>Perceived Effort of Back Squat</measure>
      <time_frame>Baseline (5 minutes before walkout) and immediately after the walkout (3 sets with 5 minutes rest in between each set)</time_frame>
      <description>Rating of perceived exertion (RPE; 1-10)</description>
    </primary_outcome>
    <primary_outcome>
      <measure>Muscle Activation during Back Squat</measure>
      <time_frame>Baseline (5 minutes before walkout) and immediately after the walkout (3 sets with 5 minutes rest in between each set)</time_frame>
      <description>Electromyography (EMG) Amplitude</description>
    </primary_outcome>
    <number_of_arms>2</number_of_arms>
    <enrollment type="Anticipated">16</enrollment>
    <condition>Healthy</condition>
    <arm_group>
      <arm_group_label>Supramaximal Walkout</arm_group_label>
      <arm_group_type>Experimental</arm_group_type>
      <description>Walkout set performed at 110% 1RM</description>
    </arm_group>
    <arm_group>
      <arm_group_label>Control (Submaximal Walkout)</arm_group_label>
      <arm_group_type>Experimental</arm_group_type>
      <description>Walkout set performed at 30% 1RM</description>
    </arm_group>
    <intervention>
      <intervention_type>Other</intervention_type>
      <intervention_name>Supramaximal Walkout</intervention_name>
      <description>Walkout set performed at 110% 1RM. Participant will unrack the weight, step back and brace as if to perform a back squat, hold for 10 seconds, then re-rack the weight without performing the squat.</description>
      <arm_group_label>Supramaximal Walkout</arm_group_label>
    </intervention>
    <intervention>
      <intervention_type>Other</intervention_type>
      <intervention_name>Submaximal Walkout</intervention_name>
      <description>Walkout set performed at 30% 1RM. Participant will unrack the weight, step back and brace as if to perform a back squat, hold for 10 seconds, then re-rack the weight without performing the squat.</description>
      <arm_group_label>Control (Submaximal Walkout)</arm_group_label>
    </intervention>
    <eligibility>
      <criteria>
        <textblock>
          Inclusion Criteria:&#xD;
  &#xD;
            -  Sex: Male&#xD;
  &#xD;
            -  Age: 18-45 yr&#xD;
  &#xD;
            -  1RM Back Squat ≥ 1.5x Body Weight&#xD;
  &#xD;
          Exclusion Criteria:&#xD;
  &#xD;
            -  Musculoskeletal injuries limiting exercise capacity&#xD;
  &#xD;
            -  Cardiometabolic diseases limiting exercise capacity&#xD;
  &#xD;
            -  Hasn't performed squats in the past six months&#xD;
  &#xD;
            -  History of Rhabdomyolysis&#xD;
  &#xD;
            -  Use of anabolic steroids in the past year&#xD;
        </textblock>
      </criteria>
      <gender>Male</gender>
      <minimum_age>18 Years</minimum_age>
      <maximum_age>45 Years</maximum_age>
      <healthy_volunteers>Accepts Healthy Volunteers</healthy_volunteers>
    </eligibility>
    <overall_official>
      <last_name>Michael Ormsbee, PhD</last_name>
      <role>Study Chair</role>
      <affiliation>Florida State University</affiliation>
    </overall_official>
    <overall_contact>
      <last_name>Tim Griest, MS</last_name>
      <phone>7174664286</phone>
      <email>tdg21c@fsu.edu</email>
    </overall_contact>
    <overall_contact_backup>
      <last_name>Michael Ormsbee, PhD</last_name>
      <phone>6103313126</phone>
      <email>mormsbee@fsu.edu</email>
    </overall_contact_backup>
    <location>
      <facility>
        <name>Institute of Sports Sciences &amp; Medicine</name>
        <address>
          <city>Tallahassee</city>
          <state>Florida</state>
          <zip>32304</zip>
          <country>United States</country>
        </address>
      </facility>
      <status>Recruiting</status>
      <contact>
        <last_name>Tim Griest, MS</last_name>
        <phone>717-466-4286</phone>
        <email>tdg21c@fsu.edu</email>
      </contact>
    </location>
    <location_countries>
      <country>United States</country>
    </location_countries>
    <verification_date>August 2023</verification_date>
    <study_first_submitted>July 28, 2023</study_first_submitted>
    <study_first_submitted_qc>August 4, 2023</study_first_submitted_qc>
    <study_first_posted type="Actual">August 14, 2023</study_first_posted>
    <last_update_submitted>August 10, 2023</last_update_submitted>
    <last_update_submitted_qc>August 10, 2023</last_update_submitted_qc>
    <last_update_posted type="Actual">August 14, 2023</last_update_posted>
    <responsible_party>
      <responsible_party_type>Principal Investigator</responsible_party_type>
      <investigator_affiliation>Florida State University</investigator_affiliation>
      <investigator_full_name>Michael J. Ormsbee</investigator_full_name>
      <investigator_title>Professor</investigator_title>
    </responsible_party>
    <keyword>Muscular Strength</keyword>
    <keyword>Exercise Performance</keyword>
    <keyword>Squat</keyword>
    <patient_data>
      <sharing_ipd>No</sharing_ipd>
    </patient_data>
    <!-- Results have not yet been posted for this study                                          -->
  </clinical_study>
  
  
text: 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/NCT05988762
  org study id: STUDY00004217
  nct id: NCT05988762
  lead sponsor: 
  has dmc: No
  is fda regulated drug: No
  is fda regulated device: No
  The goal of this randomized, counterbalanced, crossover study is to determine the
        effectiveness of performing a supramaximal walkout on enhancing subsequent back squat
        performance in trained lifters. The main question we aim to answer is whether bar velocity,
        power output, perceived exertion, and muscle activation are altered when performing the back
        squat exercise after a supramaximal walkout. On the first visit, participants will be
        informed of the study protocols before providing oral and written informed consent.
        Afterwards, participants will complete maximum voluntary isometric contraction (MVIC) testing
        for the quadriceps and gluteus maximus muscle groups to generate a normalization for the
        electromyography (EMG) measurements. During the second visit, participants will perform a 1RM
        back squat. The third and fourth visits will be the experimental visits, where they will
        perform either a supramaximal (110% 1RM) or submaximal (control; 30% 1RM) walkout. A set of 1
        back squat at 92.5% 1RM will be performed prior to the walkout to serve as a baseline, then 3
        sets of 1 at 92.5% 1RM will be performed afterwards.
  Initial Visit Participants will be asked to arrive at the Institute of Sports Sciences &
        Medicine (ISSM) following a 3 h fasting period having abstained from alcohol for the previous
        24 h and heavy lower body exercise for the previous 48 h. Participants will then be informed
        of the study protocols and procedures before providing oral and written informed consent.
        Following the signing of the informed consent document, participants will complete the PAR-Q+
        to determine readiness for physical activity and an additional training history form to
        assess their previous experience with exercise and resistance training. After completion of
        these documents, participants' blood pressure will be assessed via an automatic blood
        pressure monitor (Omron, Kyoto, Japan). Next, height will be assessed to the nearest cm using
        a wall-mounted scale (Seca, Hamburg, Germany). Participants will then be weighed to the
        nearest 0.1 kg via an automated scale (Detecto® 750, Webb City, MO). Body composition will
        then be assessed via BodPod (Cosmed, Chicago, IL).
  
        Following these baseline measurements, surface electromyography (EMG) will be used to assess
        muscle activation. EMG electrodes (Noraxon, Arizona, USA) will be placed on the gluteus
        maximus and vastus lateralis muscle groups of the participants' dominant side to measure
        electrical potentials generated. Once the electrodes are in place, participants will complete
        a 5-min warmup on a cycle ergometer at a self-selected easy to moderate intensity before
        beginning maximum voluntary contraction (MVC) testing on an isokinetic dynamometer (Biodex
        Multi-Joint System-PRO, Biodex Medical Systems, Inc., Shirley, NY, USA). Isometric knee
        extension MVC torque will be measured with the knee joint flexed. The participant will test
        the isometric measurement three times at submaximal levels, followed by three maximal
        isometric contractions. Each contraction will last for 6 s and will be followed by 30 s rest.
        EMG amplitudes generated during this contraction will be used for EMG normalization.
        Following the testing on the dynamometer, participants will complete EMG normalization
        testing for the gluteus maximus. To determine this, participants will lie prone on a bench
        with their dominant knee flexed to 90°. Manual resistance will be applied to the distal thigh
        as the participant is instructed to extend their hip. Similar to the dynamometer testing, the
        participant will complete three submaximal repetitions followed by three maximal repetitions.
  
        Preliminary Visit For the preliminary visit, participants will arrive to the ISSM having
        abstained from alcohol for the previous 24 h and heavy lower body exercise for the previous
        72 h. Upon arrival, EMG electrodes will be applied to the same muscle groups as the initial
        visit. Participants will then complete a standardized warm up consisting of 5 min on the
        cycle ergometer at a self-selected easy to moderate pace, followed by a battery of dynamic
        movements (air squats, lunges, etc.) used to prepare the participant for the back squat
        exercise. Following this warm-up, participants will begin the 1RM back squat testing using a
        modified National Strength and Conditioning Association (NSCA) protocol. A linear position
        transducer system (Tendo Unit, Tendo Sports Machines, London, UK) will be attached to the
        barbell to evaluate bar velocity during the back squat movement. Following completion of the
        1RM protocol, participants will perform a 5 min active recovery (cycle ergometer).
  
        Experimental Visits For the experimental visits, participants will arrive to the ISSM a
        minimum of 72 h following the previous visit and having abstained from alcohol for the
        previous 24 h and heavy lower body exercise for the previous 72 h. Prior to testing, the EMG
        electrodes will be placed on the specific muscle groups and the linear position transducer
        will be attached to the barbell. The participants will begin by completing the same
        standardized warm up from the previous visit. After the standardized warm-up, participants
        will begin a specific warm-up with the back squat. The participant will first complete 8
        repetitions at 30% of their target load (92.5% 1RM). After a 3 min rest, the participant will
        complete 5 repetitions @ 50% of their target load. After another 3 min rest, the participant
        will complete 3 repetitions at 70% of target load followed by another 3 min rest and the
        final warm-up set of 1 repetition @ 85% of target load. After a 5 min rest, the participants
        will then complete one repetition at 92.5% 1RM. Participants will be instructed to perform
        this set with maximum effort. Following a 5 min rest, the participants will then perform
        either the supramaximal or submaximal (control) walkout. Both walkouts will consist of the
        participant un-racking the bar and stepping back to get set up into their starting squat
        position. Instead of performing the squat, the participant will remain standing in place for
        10 s before returning the bar to the rack. The supramaximal walkout will be performed at 110%
        1RM while the control walkout will be performed at 30% 1RM. Before this walkout set, the
        weight on the bar will be covered with a black trash bag to blind the participant as to which
        trial they are in. This will negate any anticipatory effects leading up to the walkout. Then,
        immediately before the participant lifts the bar off the rack, the researchers will indicate
        whether the weight is light or heavy to avoid issues when un-racking the bar. After the
        walkout, the participant will rest for 5 min, followed by 3 sets of 1 repetition at 92.5% 1RM
        with 5 min rest between each set. Participants will be instructed to perform these sets at
        maximum velocity. Following the final set, participants will perform a 5 min active recovery
        (cycle ergometer).
  
        Standardization of Diet and Training Prior to each experimental trial, participants will be
        asked to maintain consistent nutritional (dietary and supplementation) habits for the day
        preceding the experimental trial and the day of the experimental trial. Additionally,
        participants will be asked to avoid any lower body resistance exercise for the 72 h leading
        up to the experimental trial. To ensure compliance, participants will be asked to complete a
        48-h dietary intake form (attached) and a 72-h exercise log (attached) for the days preceding
        the experimental trial. Finally, participants will be asked to abstain from any alcohol for
        24 h prior to the experimental trial.
  
        Bar Velocity, Muscle Activation, and RPE Peak and mean bar velocity (m/s) and power output
        (W) will be assessed via a linear position transducer system (Tendo Sport Machines, Trencin,
        Slovakia). The transducer system will be attached to the barbell prior to the onset of the
        specific warm-up. The measurement will be made independently for each set and automatically
        converted into values of peak power output and peak velocity.
  
        Surface electromyography (EMG) will be used to assess muscle activation during each set of
        back squats. EMG electrodes (Noraxon, Arizona, USA) will be placed on the vastus lateralis
        and gluteus maximus of the participants' dominant side after the skin is shaved, abraded, and
        cleaned. The electrodes will be positioned longitudinally on the belly of each muscle. Data
        will be collected telemetrically at 1000 Hz and subjected to full-wave rectification.
        Baseline maximum EMG will be assessed during the maximal isometric torque assessment of the
        initial visit. EMG data collected during the back squat sessions will be normalized to the
        baseline EMG and presented as a percentage.
  
        Rating of perceived exertion (RPE) will be assessed using a modified Borg RPE scale
        (attached). The participants will be familiarized with the scale prior to beginning the 1RM
        protocol.
  allocation: Randomized
  intervention model: Crossover Assignment
  primary purpose: Other
  masking: Single (Participant)
  masking description: Participants will not be told whether they are performing the supramaximal or submaximal walkout. Black trash bags will be used to cover the weights during the walkout set so that the participant cannot see which condition they are in.
  measure: Back Squat Velocity
  time frame: Baseline (5 minutes before walkout) and immediately after the walkout (3 sets with 5 minutes rest in between each set)
  description: Peak and average concentric bar velocity (m/s)
  measure: Back Squat Power Output
  time frame: Baseline (5 minutes before walkout) and immediately after the walkout (3 sets with 5 minutes rest in between each set)
  description: Peak and average concentric power output (W)
  measure: Perceived Effort of Back Squat
  time frame: Baseline (5 minutes before walkout) and immediately after the walkout (3 sets with 5 minutes rest in between each set)
  description: Rating of perceived exertion (RPE; 1-10)
  measure: Muscle Activation during Back Squat
  time frame: Baseline (5 minutes before walkout) and immediately after the walkout (3 sets with 5 minutes rest in between each set)
  description: Electromyography (EMG) Amplitude
  arm group label: Supramaximal Walkout
  arm group type: Experimental
  description: Walkout set performed at 110% 1RM
  arm group label: Control (Submaximal Walkout)
  arm group type: Experimental
  description: Walkout set performed at 30% 1RM
  intervention type: Other
  intervention name: Supramaximal Walkout
  description: Walkout set performed at 110% 1RM. Participant will unrack the weight, step back and brace as if to perform a back squat, hold for 10 seconds, then re-rack the weight without performing the squat.
  arm group label: Supramaximal Walkout
  intervention type: Other
  intervention name: Submaximal Walkout
  description: Walkout set performed at 30% 1RM. Participant will unrack the weight, step back and brace as if to perform a back squat, hold for 10 seconds, then re-rack the weight without performing the squat.
  arm group label: Control (Submaximal Walkout)
  criteria: 
  gender: Male
  minimum age: 18 Years
  maximum age: 45 Years
  healthy volunteers: Accepts Healthy Volunteers
  last name: Michael Ormsbee, PhD
  role: Study Chair
  affiliation: Florida State University
  last name: Tim Griest, MS
  phone: 7174664286
  email: tdg21c@fsu.edu
  last name: Michael Ormsbee, PhD
  phone: 6103313126
  email: mormsbee@fsu.edu
  facility: 
  status: Recruiting
  contact: 
  country: United States
  responsible party type: Principal Investigator
  investigator affiliation: Florida State University
  investigator full name: Michael J. Ormsbee
  investigator title: Professor
  sharing ipd: No