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Completed

NCT Number: NCT04469361

The Effect of Training on Hemodynamic Factors in Ballet Dancer

Classic ballet dance is a demonstration of complex motor skills to be revealed in aesthetic combinations and repetitively, and it demands intensive use of the lower extremities within extreme of range of motion (ROM). Because ballet practice depends on advanced technical skills, it involves intensive physical training and causes an overload on the musculoskeletal system and foot deformities such as pes planus.

Plantar venous pump (PVP) is a network of multiple venous vessels located between the muscles of the foot arch. PVP is considered the first step of venous return and discharges into the posterior tibial vein (PTV). PVP is reported to be active during gait while it is inactive in resting position. There are different views on the mechanisms enabling its activation 1-3. The general view is that during the stance phase of the gait, the flattening of the plantar arch with weight transfer causes the veins in this region to narrow and creates a force that pumps the blood up.

The aim of this study is the investigation what kind of hemodynamic changes ballet training causes in the lower extremity

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Key information

Conditions

Venous Insufficiency Cardiovascular Diseases Foot Drop (Acquired) Mononeuropathies Nervous System Diseases Neuromuscular Diseases Peripheral Nervous System Diseases Peroneal Neuropathies Vascular Diseases

Age range

14 year–19 year

Sex eligibility

Female

Study type

Observational

Primary location

Marmara University

Istanbul, 34000, Turkey (Türkiye)

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

(for balerinas):

  • receiving ballet training at least 10 h per week for at least 4 years
  • receiving formal dancing training system

Inclusion criteria

(for non-dancer group)

  • never receiving formal dancing training
  • having sedentary lifestyle

Exclusion criteria

  • Participants with a history of foot or ankle surgery,
  • Participants with connective tissue disease,
  • Participants with rigid pes planus-cavus,
  • Participants with chronic venous insufficiency
  • Participants with acute ankle injury in recent 3 months

Treatment and study plan

Navicular drop measurement

Other

The difference in navicular height between sitting and standing positions was recorded (mm) as the amount of navicular drop.

Measurement of venous return parameters in supine

Other

Venous return parameters of posterior tibial vein was measured when participant applied force equivalent to their own body weight on plantar surface of their right leg in supine position

Measurement of venous return parameters in standing

Other

In standing, venous return parameters was measured of posterior tibial vein when participants shift all of their weight to the right leg for 3 second with their leg muscles as relaxed as possible and their knee joint in full extension.

measurement of midfoot pressure distrubition

Other

In standing, midfoot pressure distrubution was measured when participants shift all of their weight to the right leg

Primary outcomes

  1. Evaluation of navicular drop

    Time frame: Cchange from baseline navicular height in pre-intervention and immediately after the intervention/

    Navicular drop was measured in mm

  2. Evaluation of diameter of tibialis posterior vein in supine

    Time frame: Change from baseline diameter of tibialis posterior vein during intervention

    Diameter of tibialis posterior vein was measured in mm

  3. Evaluation of flow velocity of tibialis posterior vein in supine

    Time frame: Change from baseline flow velocity of tibialis posterior vein during intervention

    Flow velocity of tibialis posterior vein was measured in cm/s

  4. Evaluation of volume flow of tibialis posterior vein in supine

    Time frame: Change from baseline volume flow of tibialis posterior vein during intervention

    Volume flow of tibialis posterior vein was measured in ml/min

  5. Evaluation of diameter of tibialis posterior vein during weight bearing

    Time frame: Change from baseline diameter of tibialis posterior during intervention

    Diameter of tibialis posterior vein was measured in mm

  6. Evaluation of flow velocity of tibialis posterior vein during weight bearing

    Time frame: Change from baseline flow velocity of tibialis posterior vein during intervention

    Flow velocity of tibialis posterior vein was measured in cm/s

  7. Evaluation of volume flow of tibialis posterior vein during weight bearing

    Time frame: Change from baseline volume flow of tibialis posterior vein during intervention

    Volume flow of tibialis posterior vein was measured in ml/min

  8. Evaluation of midfoot plantar pressure during weight bearing

    Time frame: Change from baseline midfoot pressure during intervention

    Midfoot plantar pressure was measured in gr/cm2

Sponsors and collaborators

Lead sponsor

Marmara University

Other

Registry information

Official study title

The Effect of Ballet Training on Plantar Venous Pump Activity in Ballerinas

Important dates

Study start
2017
Primary completion
2017
Study completion
2018
First posted
Jul 14, 2020
Registry last updated
Jul 14, 2020

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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