Changes in breaststroke swimming performances in national and international athletes competing between 1994 and 2011 –a comparison with freestyle swimming performances

Table 1 Comparison of linear and non-linear regression analysis of changes in swimming speed for female and male breast stroke swimmers at national level across years to determine which model is the best

	Kind of regression	Sum of Squares	DOF	AICC	Best regression AIC-Test	Best regression F-Test	Delta	Probability	Likelihood
50 m breaststroke	polynomial	0.0035	12	−138.34	linear	linear	2.80	0.19	80.3%
male Swiss swimmers	linear	0.0062	16	−141.15	linear	linear	2.80	0.19	80.3%
100 m breaststroke	polynomial	0.0009	0	−144.16	linear	undetermined	5.72	0.054	94.6%
male Swiss swimmers	linear	0.0038	16	−149.88	linear	undetermined	5.72	0.054	94.6%
200 m breaststroke	polynomial	0.0011	0	−139.69	linear	undetermined	13.48	0.0011	99.88%
male Swiss swimmers	linear	0.0032	16	−153.17	linear	undetermined	13.48	0.0011	99.88%
50 m breaststroke	polynomial	0.0011	0	−140.12	linear	undetermined	6.62	0.035	96.5%
female Swiss swimmers	linear	0.0045	16	−146.74	linear	undetermined	6.62	0.035	96.5%
100 m breaststroke	polynomial	0.0018	0	−131.76	linear	undetermined	29.91	3.19 e⁻⁰⁷	100%
female Swiss swimmers	linear	0.0019	16	−161.67	linear	undetermined	29.91	3.19 e⁻⁰⁷	100%
200 m breaststroke	polynomial	0.0014	0	−135.81	linear	undetermined	22.41	1.35 e^-05	99.99%
female Swiss swimmers	linear	0.0024	16	−158.22	linear	undetermined	22.41	1.35 e^-05	99.99%

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