Establishing evaluation for relative flexibility of hamstrings and investigating impacts of stretching ways on hamstrings flexibility

Establishing evaluation for relative flexibility of hamstrings and investigating impacts of stretching ways on hamstrings flexibility - Comparing effectiveness of interventions using jack-knife hamstring stretching and stretching with maintenance of lumbar lordosis for those with reduction of relative flexibility of hamstring to the back: a randomized control trial

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000019343

Enrollment

Registered

2015-10-14

Start date

2015-10-22

Completion date

Unknown

Last updated

2026-06-29

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

Conditions

Healthy individuals or those with low back pain

Interventions

Participants in the jack-knife hamstring stretching group will do jack-knife hamstring stretching for 5 weeks (15 seconds x 4 repetitions/set x 3 sets/day) at home. Participants in the hamstring stret

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Those who will lose lumbar lordosis when extending the knee (10 degrees of knee flexion)

Exclusion criteria

Exclusion criteria: Those with symptoms over the lower limb Those with reduction of knee extension range from 10 degrees of knee flexion in sitting when ankle dorsal flexion is added

Design outcomes

Primary

Measure	Time frame
Relative flexibility of hamstring to the back will be assessed with the degree of lumbar lordosis when a knee is fully extended in sitting. The prevalence of low back pain will be assessed with a self-reporting questionnaire. Evaluation will be performed at the time of participant's inclusion and 5 weeks after the intervention.	—

Countries

Japan

Contacts

Public ContactHiroshi Takasaki

Saitama Prefectural University Physical Therapy

takasaki-hiroshi@spu.ac.jp0489734706

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026