Effects of dynamic stretching and tissue flossing on muscle function, sprint performance, balance, and proprioception in soccer players with hamstring shortness

Acute, chronic, and detraining effects of dynamic stretching and tissue flossing on muscle function, sprint performance, balance, and proprioception, in soccer players with hamstring shortness: a three-arm parallel randomized controlled trial protocol

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

IRCT

Registry ID

IRCT20251202068197N1

Enrollment

Registered

2025-12-05

Start date

2025-12-10

Completion date

Unknown

Last updated

2025-12-08

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

Conditions

Limited knee range of motion. Stiffness of joint, not elsewhere classified

Interventions

Intervention 1: Intervention group: Participants assigned to the tissue flossing group will undergo floss band application, which will be anchored just above the distal third of the thigh between the

Eligibility

Sex/Gender

Male

Age

14 Years to 17 Years

Inclusion criteria

Inclusion criteria: Male amateur soccer players (who play in local leagues without a financial contract) aged 14 to 17 years Minimum of 3 years of continuous soccer participation within organized soccer clubs Clinically diagnosed with hamstring shortness, defined as a score of more than 33 degrees on the active knee extension test No prohibition on using dynamic stretching or tissue flossing, with the approval of a medical professional

Exclusion criteria

Exclusion criteria: Lower limb injuries during the study Inability to commit to the full study duration and prescribed protocols, including more than two consecutive or three total absences

Design outcomes

Primary

Measure	Time frame
In the current study, hamstring shortness, knee range of motion, hamstring flexibility, muscle strength, muscle power, sprint performance, dynamic balance, and joint position sense are being investigated. Timepoint: Baseline, Acute effect measurement (after the first session), Chronic effect measurement (after 6 weeks of training), and Follow-up measurement (after 3 weeks of detraining). Method of measurement: The following outcome measures will be assessed using the corresponding tests: hamstring shortness and knee range of motion via the active knee extension test; hamstring flexibility via the active straight leg raise test; muscle strength (isometric and eccentric hamstring, isometric quadriceps) using a handheld dynamometer; lower-body muscle power via the countermovement jump test; sprint performance using the MySprint app protocol; dynamic balance via the Y-Balance test; and knee joint proprioception via a joint position sense test.	—

Measure

Time frame

In the current study, hamstring shortness, knee range of motion, hamstring flexibility, muscle strength, muscle power, sprint performance, dynamic balance, and joint position sense are being investigated. Timepoint: Baseline, Acute effect measurement (after the first session), Chronic effect measurement (after 6 weeks of training), and Follow-up measurement (after 3 weeks of detraining). Method of measurement: The following outcome measures will be assessed using the corresponding tests: hamstring shortness and knee range of motion via the active knee extension test; hamstring flexibility via the active straight leg raise test; muscle strength (isometric and eccentric hamstring, isometric quadriceps) using a handheld dynamometer; lower-body muscle power via the countermovement jump test; sprint performance using the MySprint app protocol; dynamic balance via the Y-Balance test; and knee joint proprioception via a joint position sense test.

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Countries

Iran (Islamic Republic of)

Contacts

Public ContactHassan Daneshmandi

University of Guilan

mohammadalghosi9@gmail.com+98 933 611 7047

Outcome results

None listed

Source: IRCT (via WHO ICTRP) · Data processed: Feb 4, 2026