Reproducibility of an endurance test for master swimmers

Seventeen male swimmers, aged from 30 to 50 years (35.06 ± 5.36), weight (78.71 ± 13.06 kg), height (174.35 ± 0.07 cm), participated in this study. The participants underwent the Progressive Swim Test (PSwT), which corresponds to swimming progressively to exhaustion in a 25-meter pool, guided by the recording of sound signals indicating the swimming rhythm. We verified the following variables: heart rate before the test (BHR) and right after the end of the test (AHR), followed by the rate of perceived exertion (RPE) and a total of laps performed (SN - swimming number). For comparison between the three days of tests, the one-way repeated measures ANOVA with Tukey's Post-Hoc was performed. Relative reproducibility was performed by the r test and the intraclass correlation coefficient (ICC). Absolute reproducibility was determined using the coefficient of variation (CV) and the confidence interval (CI).

Results:

The results showed high reproducibility in (PSwT) in master swimmers in the analyzed variables of intergroup and intragroup with relative reproducibility of r > 0.60 and ICC > 0.70 and absolute reproducibility with CI 95% (lower −1.10 and upper 0.99) and CV < 10%. Most of the cases were within the limits of agreement of the Bland-Altman tests, all variables were considered a level of significance with (p <0.05).

Conclusion:

The Progressive Swim Test (PSwT) is a reproducible instrument in the assessment of endurance in master swimmers.

Keywords
swimming; physical evaluation; resistance training; performance

Variable	1st day	2nd day	3rd day
BHR (bpm)	77.93 ± 8.87	80.56 ± 9.67	78.67 ± 8.44
AHR (bpm)	157.4 ± 11.50	161.3 ± 10.90	163.8 ± 9.90
SN	10.7 ± 4.10	10.1 ± 3.90	10.5 ± 3.90
S_m (m/s)	0.96 ± 0.05	0.98 ± 0.05	0.98 ± 0.04
L_cic (m/cic)	1.82 ± 0.10	1.85 ± 0.15	1.83 ± 0.15
SI	1.85 ± 0.15	1.86 ± 0.30	1.87 ± 0.27

Variable	r	p	CV	ICC (95% IC)	p
BHR (bpm)	0.22	0.45	6%	0.31 (−1.10;0.76)	0.25
AHR (bpm)	0.42	0.14	5%	0.75 (0.99;0.91)	0.00*
RPE	0.68	0.01*	3%	0.77 (0.35;0.92)	0.00*
SN	0.93	0.00*	8%	0.96(0.89;0.99)	0.00*
S_m (m/s)	0.67	0.01*	2%	0.74 (0.30;0.91)	0.00*
L_cic (m/cic)	0.53	0.06	4%	0.84 (0.52;0.95)	0.00*
SI	0.81	0.00*	5%	0.74 (0.25;0.91)	0.01*

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E-mail: motriz.rc@unesp.br

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[1] Associate Editor: Gustavo R da Mota0000-0002-6109-0658, Universidade Federal do Triângulo Mineiro, Uberaba, MG, Brazil. E-mail: grmotta@gmail.com.