Adaptation in Lower Extremity After 3 Running Days, With a Group Trained by Eccentric Overload

Differences in Muscle (Vastus Laterals and Gastrocnemius Medialis) and Tendon Adaptation (Patellar and Achilles) in Lower Extremity After 3 Running Days With a Group Trained by Eccentric Overload, Measured by Ultrasound and Thermography

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT02481063

Enrollment

Registered

2015-06-25

Start date

2015-06-30

Completion date

2015-08-31

Last updated

2015-08-21

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Sports Injuries

Keywords

Eccentric, Running, Muscle, Tendon, Ultrasound, Thermography

Brief summary

This study evaluates the changes in muscles and tendons in the lower limb after an intervention of fatigue during 3 consecutive days between trained or not healthy subjects. One of the 2 groups received training by eccentric overload previously.

Detailed description

Changes in muscle and tendon tissues, due to exercise, could determine in the future the possibility of an injury. Understand the changes in the mechanical tissues is a key tool for prevention. The evaluation of the thickness and area in tendons, the existence of new vessels within the tendon, muscle pennation angle or thermography are tools that have been widely used to detect these changes. Running is one of the activities that can cause more muscle-tendon injuries, specially overuse injuries. However, the eccentric exercise suggest to make some adaptations in different tissues that may be beneficial to prevent damage after exercise.

Interventions

OTHERControl

3 Consecutive Days Running at 80% Maximus Heart Rate

OTHEREccentric Overload

Training with Eccentric Overload (Squat in Yoyo Technology) during 6 Weeks 3 Consecutive Days Running at 80% Maximus Heart Rate

Study design

Allocation

NON_RANDOMIZED

Intervention model

PARALLEL

Primary purpose

SCREENING

Masking

SINGLE (Outcomes Assessor)

Eligibility

Sex/Gender

MALE

Age

18 Years to No maximum

Healthy volunteers

Yes

Inclusion criteria

* Healthy subjects that performs any sport usually * Subjects that never have made eccentric training will be included. * Subjects must be willing to perform the procedure * Sign informed consent

Exclusion criteria

* Subjects enrolled with lower limb pathology in last 6 months * Subjects that don´t complete all the procedure will be excluded.

Design outcomes

Primary

Measure	Time frame	Description
Composite Measure with Ultrasound in Tendons and Muscles	Change from Baseline in tendon structure, an expected average of 3 days of running	Ultrasound in Patellar and Achilles Tendon, to measure area, thickness and new blood vessels with Doppler. Ultrasound in Vastus Lateralis and Gastrocnemius Medialis to measure pennation angle

Secondary

Measure	Time frame	Description
Temperature changes in Patellar and Achilles Tendon as assessed by thermography	Change from Baseline in tendon structure after 3 days of running. Just immediately and 10 minutes after intervention	Thermography in Patellar and Achilles Tendon in order to measure changes in temperature os these areas of interest

Countries

Spain

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026