PTOtherInternational journal of sports physical therapy2021

Female Adolescent Soccer Players Utilize Different Neuromuscular Strategies Between Limbs During the Propulsion Phase of a Lateral Vertical Jump.

Matthew D DeLang, Joseph P Hannon, Shiho Goto and 2 others

PMID 34123522

WHAT IT FOUND

Jump height did not differ between kicking and non-kicking limbs in adolescent female soccer players.

The limbs still moved differently during takeoff: the kicking limb used more hip contribution and less knee contribution.

Key findings

01Vertical jump height was 0.12 m on the dominant limb and 0.13 m on the non-dominant limb, and quadriceps strength was 1.79 Nm/kg on the dominant limb and 1.82 Nm/kg on the non-dominant limb, with no significant difference.

02The dominant limb had greater hip energy generation contribution than the non-dominant limb (29.7±8.6% vs 18.4±6.3%, p < 0.001).

03The dominant limb had lower knee energy generation contribution than the non-dominant limb (22.8±6.8% vs 36.2±8.5%, p < 0.001).

STILL TO COME

How it was doneWhat they foundWhat it means for PTs

Read the rest of this summary

You get three full summaries a month, free, and we do not ask for a card. Search, the TL;DRs and your library stay unlimited either way.

Already have one?

What it does not show

Only 17 healthy adolescent female soccer players were tested, so the results may not apply to adult, male, injured, or lower-level players. The study was cross-sectional and did not test an intervention, so it cannot show that hip or knee exercise changes jump strategy or injury risk. Dominance was defined only by self-reported kicking preference. Quadriceps strength was measured, but hip strength was not, so strength differences cannot be fully separated from movement strategy differences. The authors say the clinical relevance of the energy generation asymmetries remains difficult to ascertain.

The easy way to misread this

Do not read the hip and knee differences as evidence that the dominant limb is stronger or jumps higher. Jump height and quadriceps strength were not significantly different, and the study did not link these strategy differences to injury.

Read it on PubMed →