Evidence map›Paper›PMID 33560920›Full record

ArticleSports health2021

Vertical and Horizontal Hop Performance: Contributions of the Hip, Knee, and Ankle.

Argyro Kotsifaki, Vasileios Korakakis, Philip Graham-Smith, Vasileios Sideris, Rod Whiteley

Abstract read
In one paragraph

Article in Sports health, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 68 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
68citing papers in PubMed, 5 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

68 citing papers in PubMed, 5 syntheses or guidelines pooled it.

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8 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Argyro KotsifakiDepartment of Rehabilitation, Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar.
Vasileios KorakakisDepartment of Rehabilitation, Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar.
Philip Graham-SmithAspire Academy, Doha, Qatar.
Vasileios SiderisDepartment of Rehabilitation, Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar.
Rod WhiteleyDepartment of Rehabilitation, Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundSingle-leg vertical and horizontal hop tests are commonly used to assess performance of healthy athletes and as a measure of progress during rehabilitation from knee injury. It is unclear if they measure similar aspects of leg function, as the relative joint contributions of the hip, knee, and ankle joints during propulsion and landing are unknown. HYPOTHESIS: The proportion of work done by the hip, knee, and ankle will not be the same for these 2 jump types and will vary for propulsive and landing phases. STUDY

designCross-sectional cohort study. LEVEL OF EVIDENCE: Level 3.

methodsTwenty physically active participants completed instrumented single-leg hop analysis in both vertical and horizontal directions. Joint peak power, work generated or absorbed, and percentage contribution of each joint during propulsive and landing phases were compared between tasks using paired

resultsVertical hop was performed with roughly similar contributions of the hip, knee, and ankle for both propulsion (31%, 34%, 35%, respectively) and landing (29%, 34%, 37%, respectively). Horizontal hop distance was mostly (87%) determined by the hip and ankle (44% and 43%), but landing was mostly (65%) performed by the knee with lesser contribution from the hip and ankle (24% and 11%). Propulsive phase showed a proximal-to-distal temporal sequence for both hop types, but landing was more complex.

conclusionPerformance during vertical and horizontal hops (jump height and jump distance, respectively) measures different aspects of hip, knee, and ankle function during the propulsive and landing phases. CLINICAL RELEVANCE: Assessment of knee joint function during rehabilitation should not be done using a horizontal hop. The knee contributes about a third to vertical hop height, but only about an eighth to horizontal hop distance. Practitioners carrying out performance testing using either vertical or horizontal hops should be mindful of the relative contributions for meaningful training inferences to be derived.

Indexed as

Plyometric ExerciseAdultAnkleBiomechanical PhenomenaCross-Sectional StudiesExercise TestHipHumansKneeKnee InjuriesMaleMovementMuscle Strengthhorizontal hopjoint workpowervertical hop

Identifiers

PMID33560920
PMCPMC8167345

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.