Table 1 Anaerobic power parameters in athletes of different age groups measured by application of the Wingate anaerobic test (all parameters are presented as mean±standard deviation, in absolute values and in relation to their body weight, with a 95% confidence interval (CI) expressed for each value as the range from the lower to upper limits).

WAnT	I	II	III
PP (W)	692.94±216.53	593.40±185.91	381.50±117.62*
CI	(621.21–764.68)	(499.32–687.48)	(308.60–454.40)
PP/BW (W/kg)	7.94±2.30	6.84±1.92	4.65±0.80*
CI	(7.18–8.70)	(5.87–7.81)	4.15–5.15
EP (W/s)	101.37±39.25	90.46±35.66	50.21±22.72*
CI	(88.37–114.37)	(72.41–108.51)	36.13–64.29
EP/BW (W/s/kg)	1.16±0.41	1.04±0.39	0.60±0.20*
CI	(1.02–1.29)	(0.85–1.24)	(0.48–0.73)
MP (W)	440.60±117.44	385.91±107.55	266.68±65.53*
CI	(401.69–479.50)	(331.49–440.34)	(226.07–307.30)
MP/BW (W/kg)	5.06±1.26	4.47±1.19	3.27±0.44*
CI	(4.64–5.47)	(3.87–5.08)	(3.00–3.54)
W (J)	13 217.89±3 523.06	11 577.33±3 226.42	8 000.50±1 965.85*
CI	(12 050.71–14 385.06)	(9 944.57–13 210.10)	(6 782.08–9 218.92)
W/BW (J/kg)	151.69±37.84	134.25±35.77	98.19±13.15*
CI	(139.16–164.23)	(116.15–152.35)	(90.04–106.34)
FI (%)	49.05±12.89	45.78±10.77	34.62±11.44*
CI	(44.78–53.32)	(40.33–51.23)	(27.53–41.71)
FI/BW (%/kg)	0.57±0.16	0.53±0.11	0.42±0.09*
CI	(0.52–0.62)	(0.47–0.59)	(0.37–0.48)
PD (W)	20.01±7.24	16.29±6.60	8.95±4.84*
CI	(17.61–22.41)	(12.94–19.63)	(5.95–11.95)
PD/BW (W/kg)	0.23±0.08	0.19±0.06	0.11±0.04*
CI	(0.20–0.26)	(0.15–0.22)	(0.08–0.13)

PP – peak power, EP – explosive power, MP – mean power, W – work, FI – fatigue index, PD – power decline, BW – body weight

*statistically significant difference, when comparing group III with group I (for absolute values p≤0.001, when parameters were expressed in relation to body weight p≤0.01) and II (for all values p≤0.05)