Dynamic Knee Alignment and Pelvic Balance: Comparison Regarding Gender in Young Soccer Athletes

Silva, Flaviano Moreira da; Canêz, Denis Bordoni; Madeira, Andressa Rodeghiero; Ferreira, Gustavo Dias

doi:10.1055/s-0040-1721361

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Sumário

Original Article • Rev. bras. ortop. 56 (2) • Mar-Apr 2021 • https://doi.org/10.1055/s-0040-1721361 copy

Dynamic Knee Alignment and Pelvic Balance: Comparison Regarding Gender in Young Soccer Athletes^* * Study developed at Universidade Católica de Pelotas, Pelotas, Rio Grande do Sul, Brazil.

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

Objective

To evaluate knee alignment in the frontal plane and pelvic balance during the step-down test in female and male soccer players.

Methods

Cross-sectional study carried out with male and female soccer players from under-15 and under-17 teams of a professional club in Southern Brazil. The step-down test was performed, filmed with a video camera, and evaluated according to the angular measurements obtained during movement using the Kinovea software (open source), version 0.8.24.

Results

The sample consisted of 38 individuals, 19 males and 19 females. Female athletes had a greater varus angle (9.42º ± 1.65º) compared to male athletes (3.91º ± 2.0º; p = 0.04). There was no difference regarding the unilateral pelvic drop between the groups. In addition, the association between the hip-related pelvic drop and the projection angle on the frontal plane of the knee was weak in both genders.

Conclusion

Even though the pelvic drop was observed in both genders, young female athletes had greater varus knee angles on the step-down test, which require greater attention to minimize the risk of injury.

	Gender	Under-15	Under-17	Total
Mean (standard deviation) age (in years)	Male	15 (0.00)	16.6 (0.51)	16.4 (0.69)
	Female	14.5 (1.07)	17 (0.00)	15.9 (1.43)
Time of practice
Less than 1 year	Male	0%	0%	0%
	Female	50%	27.3%	36.8%
1 year	Male	0%	5.9%	5.25%
	Female	12.5%	18.2%	15.8%
2 years	Male	0%	0%	0%
	Female	25%	36.3%	31.6%
3 years	Male	0%	5.9%	5.25%
	Female	12.5%	9.1%	10.5%
5 years or more	Male	100%	88.2%	89.5%
	Female	0%	9.1%	5.3%
Guided soccer practice
Once a week	Male	0%	0%	0%
	Female	37.5%	18.2%	26.3%
3 times a week	Male	50%	35.3%	36.8%
	Female	50%	54.5%	52.6%
More than 3 times a week	Male	50%	64.7%	63.2%
	Female	12.5%	27.3%	21.1%

		Male			Female
	N	Mean	Standard deviation	N	Mean	Standard deviation	p-value
FPPA (degrees)	19	3.91	2.00	19	9.42	1.65	0.04^* * statistically-significant difference.
Pelvic drop (cm)	19	9.00	3.02	19	9.67	3.25	0.51

	r-value^* * Pearson correlation.	p-value
Total (N = 38)	0.34	0.13
Male (N = 19)	0.31	0.19
Female (N = 19)	0.35	0.14

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[1] Address for correspondence Flaviano Moreira da Silva, Rua Barão de Santa Tecla, 1.160, apto 402, Centro, Pelotas, Rio Grande do Sul, Brazil (e-mail: flaviano.silva@ucpel.edu.br).

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Dynamic Knee Alignment and Pelvic Balance: Comparison Regarding Gender in Young Soccer Athletes* * Study developed at Universidade Católica de Pelotas, Pelotas, Rio Grande do Sul, Brazil.

Abstract

Objective

Methods

Results

Conclusion

Dynamic Knee Alignment and Pelvic Balance: Comparison Regarding Gender in Young Soccer Athletes^* * Study developed at Universidade Católica de Pelotas, Pelotas, Rio Grande do Sul, Brazil.