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Different modes of feedback and peak vertical ground reaction force during jump landing: a systematic review
Hayley M Ericksen1, Phillip A Gribble, Kate R Pfile
1Musculoskeletal Health and Movement Science Laboratory, University of Toledo, OH. Dr Pfile is now at College of Charleston, SC.
Context:
Excessive ground reaction force when landing from a jump may result in lower extremity injuries. It is important to better understand how feedback can influence ground reaction force (GRF) and potentially reduce injury risk.
Objective:
To determine the effect of expert-provided (EP), self-analysis (SA), and combination EP and SA (combo) feedback on reducing peak vertical GRF during a jump-landing task.
Data Sources:
We searched the Web of Science database on July 1, 2011; using the search terms ground reaction force, landing biomechanics, and feedback elicited 731 initial hits.
Study Selection:
Of the 731 initial hits, our final analysis included 7 studies that incorporated 32 separate data comparisons.
Data Extraction:
Standardized effect sizes and 95% confidence intervals (CIs) were calculated between pretest and posttest scores for each feedback condition.
Data Synthesis:
We found a homogeneous beneficial effect for combo feedback, indicating a reduction in GRF with no CIs crossing zero. We also found a homogeneous beneficial effect for EP feedback, but the CIs from 4 of the 10 data comparisons crossed zero. The SA feedback showed strong, definitive effects when the intervention included a videotape SA, with no CIs crossing zero.
Conclusions:
Of the 7 studies reviewed, combo feedback seemed to produce the greatest decrease in peak vertical GRF during a jump-landing task.
