Changes in Trunk Stability Indicators Following Two Types of Exhausting Physical Activities

NCT03529734 | Unknown

• 1 other identifier: UP-FVZ-Fatigue&TrunkStability
• Study Type: interventional
• Target: 110
• Locations: 1 country
• Sites: 1

Brief Summary

In this research project, effects of two sports specific types of fatiguing protocols on trunk muscles and specific trunk stability indicators will be studied. In general, sports activities involving gross motor activities activate higher percentage of muscle mass. In addition, such activities usually demand increased ventilation and more demanding inter-muscular activation. Such an example is running, with medium intensity until exhaustion or with the goal to cover the longest distance possible in a given time. On the contrary, sports practice often incorporates local strengthening exercises into a workout, especially for the trunk muscles. These, if performed correctly, cause localized muscle fatigue and can affect their function. Understanding the effects of these activities is of importance for coaches as well as for health care providers, as other types of training usually follow such activities that can more easily lead to trunk or spinal overload. We expect that localized muscle strengthening protocol until exhaustion will have more detrimental effects on trunk stability indicators as fatiguing with exhaustive running. In these study 100 subjects will be studied, divided into two groups. First group will perform an exhaustive running protocol and the second group a localized trunk muscle strengthening protocol until exhaustion. The effect of intervention will be studied by observing the changes in trunk muscle reflex responses following sudden arm loading and changes in anticipated trunk muscle activation during a quick arm raising task. Activation latencies and electromyographic (EMG) amplitude, and center of foot pressure excursion will be used to quantify trunk stability. In addition, center of pressure movement during a sitting balance task will be studied as to gather information of local trunk stabilization functions. Finally, changes in joint position sense will be assessed in order to account for the possible changes in kinesthesia.

Conditions

Spine Stiffness; Spine Stability

Keywords

Anticipatory postural adjustments; Trunk muscles reflex responses; Sitting balance; Kinesthesia

Outcome Measures

Primary Outcomes (8)

• Amplitude of EMG response to sudden arm raising.

  EMG responses of the Erector spinae, Multifidus, Obliquus internus, Obliquus externus and Rectus abdominis will be studied.

  Change from baseline to after intervention (12 minutes).

• Latency of EMG response to sudden arm raising.

  EMG responses of the Erector spinae, Multifidus, Obliquus internus, Obliquus externus and Rectus abdominis will be studied.

  Change from baseline to after intervention (12 minutes).

• Amplitude of EMG response to sudden arm loading.

  EMG responses of the Erector spinae, Multifidus, Obliquus internus, Obliquus externus and Rectus abdominis will be studied.

  Change from baseline to after intervention (12 minutes).

• Latency of EMG response to sudden arm loading.

  EMG responses of the Erector spinae, Multifidus, Obliquus internus, Obliquus externus and Rectus abdominis will be studied.

  Change from baseline to after intervention (12 minutes).

• Average Center of pressure velocity during sitting balance task.

  Subjects will sit on an wobble board, that will be positioned on a force plate. The legs will be positioned on a specially designed rests mounted to the wobble board. Different parameters will be used to analyze the center of pressure movement (CoP), such as Average velocity of the CoP movement in both directions, Average amplitude and maximal amplitude in both directions and average frequency of CoP movement in both directions.

  Change from baseline to after intervention (12 minutes).

• Average Center of pressure amplitude during sitting balance task.

  Subjects will sit on an wobble board, that will be positioned on a force plate. The legs will be positioned on a specially designed rests mounted to the wobble board. Different parameters will be used to analyze the center of pressure movement (CoP), such as Average velocity of the CoP movement in both directions, Average amplitude and maximal amplitude in both directions and average frequency of CoP movement in both directions.

  Change from baseline to after intervention (12 minutes).

• Average Center of Pressure frequency during sitting balance task.

  Subjects will sit on an wobble board, that will be positioned on a force plate. The legs will be positioned on a specially designed rests mounted to the wobble board. Different parameters will be used to analyze the center of pressure movement (CoP), such as Average velocity of the CoP movement in both directions, Average amplitude and maximal amplitude in both directions and average frequency of CoP movement in both directions.

  Change from baseline to after intervention (12 minutes).

• Trunk Reposition Error

  Subjects will be standing upright with their eyes cowered. They will have to move into trunk flexion and hold a certain position determined by the investigator. In the next repetition the subject will have to repeat the same forward lean and hold the previously determined position. The parameter observed will be the difference between the angles.

  Change from baseline to after intervention (12 minutes).

Secondary Outcomes (6)

• Maximal trunk extension voluntary torque

  Change from baseline to after intervention (12 minutes).

• Maximal trunk flexion voluntary torque

  Change from baseline to after intervention (12 minutes).

• Center of pressure velocity during sudden arm raising.

  Change from baseline to after intervention (12 minutes).

• Center of pressure amplitude during sudden arm raising.

  Change from baseline to after intervention (12 minutes).

• Center of pressure velocity during sudden arm loading.

  Change from baseline to after intervention (12 minutes).

Study Arms (2)

12 min running group

EXPERIMENTAL

This group will perform a 12 min high intensity running with the goal to cover maximal possible distance.

Other: 12 min running

Local strengthening exercise group

EXPERIMENTAL

This group will perform local strengthening exercises (curl-ups, left side trunk flexion, trunk extension, right side trunk flexion). Each participant will have to perform three sets of each exercise with the maximal possible number of repetitions with a slow tempo (1s concentric phase and 2 s eccentric phase). Between sets, minimal rest (15 s) will be administered.

Other: Local strengthening exercises

Interventions

12 min running OTHER

This was already explained in the description of arm

12 min running group

Local strengthening exercises OTHER

This was already explained in the description of arm

Local strengthening exercise group

Eligibility Criteria

• Age: 20 Years - 30 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• Healthy individuals
• Age between 20 and 30 years

You may not qualify if:

• Chronic illness of the loco-motor system
• Acute injury of the loco-motor system in the last 1.5 years
• Neurological disease or injury
• Balance related pathology
• Vision pathology or untreated vision deficits

Sponsors & Collaborators

• University of Primorska: lead
• S2P, Science to Practice, Ltd.: collaborator
• Motus Melior: collaborator

Study Sites (1)

University of Primorska

Izola, 6310, Slovenia

RECRUITING

MeSH Terms

Interventions

Running

Intervention Hierarchy (Ancestors)

Locomotion; Movement; Musculoskeletal Physiological Phenomena; Musculoskeletal and Neural Physiological Phenomena; Exercise; Motor Activity

Central Study Contacts

Nejc Šarabon, PhD

CONTACT

+386 5 662 64 66; nejc.sarabon@fvz.upr.si

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: OTHER
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Assoc. Prof. Dr. Sc.

Study Record Dates

• First Submitted: February 12, 2018
• First Posted: May 18, 2018
• Study Start: June 1, 2018
• Primary Completion: September 30, 2018
• Study Completion: October 30, 2018
• Last Updated: May 18, 2018

Record last verified: 2018-05

Data Sharing

• IPD Sharing: Will not share

Locations

SL (1)