Clinical trial NCT04450615: Core Exercises Effects on Muscle Imbalances
Official title: Effects of a 5-week Core Training Program on Core Muscles' Imbalances
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Muscle Atrophy or Weakness
Muscle Contraction
Core Stability
Lead sponsor: Aristotle University Of Thessaloniki
Sponsor class: OTHER
First posted: 2020-06-29
Enrollment: 20
Sex: ALL
Minimum age (years): 18
Maximum age (years): 45
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: BASIC_SCIENCE

Brief summary: This study aims in investigating the effects of a core muscles' strengthening program on core muscles' atrophy and contraction ability. Twenty healthy adults recruited and randomly assigned to either a 5-week training group developed to activate and strengthen local trunk muscles or a control group. The training program includes isometric bridging exercises from various positions and dynamic exercises for lumbopelvic stability. Core muscles' thickness will be assessed at rest and contracting conditions, prior and after the intervention, using ultrasonography.

Detailed description: A total of 136 male and female adults, members of local gyms, were initially invited for participation in the study after giving their written consent. After a second contact with the participants, forms regarding the inclusion and exclusion criteria were sent for completion.

Of the 136 that initially answered positively for participation, 62 did not meet the inclusion criteria, based on their reports and the clinical examination by a health professional. Of the remaining 74 participants, 32 were excluded because of previous low back pain incidents and other recent musculoskeletal injuries that led to rehabilitation, while 22 decided to not participate for personal reasons.

The remaining 20 participants were randomly allocated to either training group or intervention group, by a neutral, blinded investigator who had no involvement and was unaware of the study purposes. The intervention group will be trained and supervised by a certified fitness instructor in a gym class, who will be responsible for the correct execution of the exercises. The duration of the intervention will be 5 weeks, 3 times a week.

Eligibility criteria: Inclusion Criteria:

* 18 to 45 years old
* Trained recreationally at least 2 times a week, for the past 3 years
* Healthy
* No musculoskeletal injuries in the 6 months prior to the study

Exclusion Criteria:

* History of chronic low back pain
* History of hip, pelvic or low back surgery
* History of acute low back pain with duration at least 1 week, the preceding 6 months
* Involvement in similar core stability training programs the last 12 moths prior to this study

Primary outcomes:
measure: Transversus abdominis (TrA) muscle thickness at rest and contraction
timeFrame: Change from baseline assessment at 5 weeks
measure: Lumbar multifidus (LM) muscle thickness at rest and contraction
timeFrame: Change from baseline assessment at 5 weeks
Secondary outcomes:
measure: Contraction thickness ratio (CTR) of TrA and LM muscle
timeFrame: Change from baseline assessment at 5 weeks
Other outcomes:
Locations:
city: Serres
country: Greece
facility: Laboratory of Neuromechanics, Department of physical education and sport sciences, Aristotle University of Thessaloniki
Study officials:
affiliation: Laboratory of Neuromechanics, Aristotle University of Thessaloniki
name: Athanasios Ellinoudis, PhD
role: PRINCIPAL_INVESTIGATOR
References: