Clinical trial NCT04182139: Acute Effects of Static Stretching Intensity and Duration on Muscle Viscoelastic Properties and Proprioception
Official title: Acute Effects of Static Stretching Intensity and Duration on Muscle Viscoelastic Properties and Proprioception
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Static Stretching
Keywords: Static Stretching
Stiffness
Proprioception
Healthy adults
Lead sponsor: Marmara University
Sponsor class: OTHER
First posted: 2019-12-02
Enrollment: 216
Sex: ALL
Minimum age (years): 18
Maximum age (years): 45
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: OTHER

Brief summary: The purpose of this study is to compare the acute effects of different duration and intensity of static stretching exercises on the viscoelastic properties of the hamstring muscle and the knee proprioception.

Detailed description: Traditionally stretching exercises have been used by health professionals as a means of preventing injuries by increasing performance and increasing joint flexibility. Kubo et al. suggest that the potential mechanism of decreased risk of injury with increased flexibility is a change in the viscoelastic properties of the muscle-tendon unit. Muscle fibers and tendons contain proprioceptors. These receptors provide information about joint angle, muscle length and muscle tension. There are two stretch-related proprioceptors that transmit information to the central nervous system about muscle tension. These receptors are muscle spindles (respond to changes in the length) and golgi tendon organs (respond to changes in the tension). For this reason, interactions between muscle tension, muscle-tendon unit, viscoelasticity and proprioceptive tissue (muscle spindles and golgi tendon organ); it becomes important when you think about how stretching exercises affect proprioception, flexibility and increase or decrease of joint range of motion. In the literature, four stretching parameters have been defined as important to influence the potential for increasing or decreasing the flexibility of a joint: intensity, duration, frequency and stretching position. The focus of this study we plan on is the intensity and duration of stretching.

Exercise warming exercises before sportive activity and cooling exercises afterwards are widely suggested and applied. Determining the relationship between stretch severity and duration and viscoelastic properties and proprioception will contribute to the effective creation of training programs.

Eligibility criteria: Inclusion Criteria:

* Being in the 18-45 age range.
* Volunteer to participate in the study.

Exclusion Criteria:

* Having had previous lower extremity operations.
* Having an orthopedic, neurological and rheumatologic disease of the lower extremities.
* Having open wound in the application area.
* Having had soft tissue injury in the last 6 weeks in the application area.

Primary outcomes:
measure: Change from baseline muscle viscoelastic properties at immediately after exercise
timeFrame: 10 minutes
measure: Change from baseline proprioception at immediately after exercise
timeFrame: 10 minutes
measure: Change from baseline static stretching exercise intensity at the beginning of each exercise
timeFrame: 10 minutes
Secondary outcomes:
Other outcomes:
Locations:
city: Istanbul
country: Turkey
facility: Marmara University
Study officials:
affiliation: Marmara University
name: Yusuf Hasırcı
role: PRINCIPAL_INVESTIGATOR
affiliation: Marmara University
name: Semra Oğuz
role: STUDY_DIRECTOR
References:
citation: Kubo K, Kanehisa H, Kawakami Y, Fukunaga T. Influence of static stretching on viscoelastic properties of human tendon structures in vivo. J Appl Physiol (1985). 2001 Feb;90(2):520-7. doi: 10.1152/jappl.2001.90.2.520.
citation: Apostolopoulos N, Metsios GS, Flouris AD, Koutedakis Y, Wyon MA. The relevance of stretch intensity and position-a systematic review. Front Psychol. 2015 Aug 18;6:1128. doi: 10.3389/fpsyg.2015.01128. eCollection 2015.