Shockingly simple: electric stretch boosts young Footballers' flexibility

NCT ID NCT07075497

Completed Symptom relief Sponsor: Cardenal Herrera University Source: ClinicalTrials.gov ↗

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tested whether adding a mild electrical stimulation to a specific stretching technique (PNF) could improve hamstring flexibility and jumping ability in young football players aged 10 to 18. Forty-seven active players were split into two groups: one received real electrical stimulation during stretching, the other a placebo. The goal was to see if the combo could help prevent common hamstring injuries. Results may show a simple way to enhance flexibility in young athletes.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance: neuromuscular electrical stimulation (NMES) combined with proprioceptive neuromuscular facilitation (PNF) stretching
What this could lead to: If it works, this could offer a simple way to improve hamstring flexibility and reduce injury risk in young athletes.
What could go wrong: This is a small, completed trial with only 47 participants, so results may not apply to all athletes. The intervention is short-term and may not prevent injuries long-term.

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

HAMSTRING FLEXIBILITY HAMSTRING MUSCLE TIGHTNESS

Contacts and locations

Locations

University Ceu Cardenal Herrera

Alfara del Patriarca, Valencia, 46113, Spain

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