Table I.

Subject characteristics (mean ± SD)

Variable	N	Age [years]	Body height [m]	Body mass [kg]	Body fat [%]	Fat free mass [kg]	Sports experience [years]	Training/week [h]
Males
Cross-country skiing [1]	20	19.3 ±1.9[2]	1.79 ±0.04	73.3 ±3.3[2,3]	10.7 ±2.2[5]	65.8 ±3.0[2,3]	8.2 ±2.7[2,3]	17.6 ±6.5[3,4]
Judo [2]	34	22.7 ±4.1[1,3]	1.80 ±0.07	86.8 ±13.9[1,3,4,5]	12.9 ±4.5[3,4,5]	75.0 ±9.4[1,3,4,5]	13.6 ±4.1[1,3,4]	14.3 ±5.6[4,5]
Middle- and long-distance running [3]	21	17.7 ±0.8[2]	1.77 ±0.06	63.4 ±5.9[1,2,4]	9.1 ±1.6[2]	57.6 ±5.4[1,2,4]	3.4 ±1.1[1,2,4,5]	10.9 ±2.1[1,4,5]
Modern pentathlon [4]	24	20.4 ±4.9	1.80 ±0.06	73.1 ±5.9[2,3]	10.4 ±3.0[2]	65.5 ±5.5[2,3]	9.8 ±4.4[2,3]	25.3 ±5.5[1,2,3]
Nordic combined [5]	8	20.7 ±3.7	1.78 ±0.04	63.8 ±5.7[1,2]	6.6 ±2.4[1,4]	59.6 ±4.8[2]	10.6 ±3.2[3]	20.6 ±4.4[2,3]
Total number	107
Females
Cross-country skiing [1]	20	20.5 ±3.8	1.67 ±0.05	58.5 ±5.1	22.0 ±3.6	45.6 ±3.9	7.0 ±2.6[2,4]	15.3 ±5.9[3,4]
Judo [2]	16	20.6 ±2.1	1.63 ±0.06[3,4]	61.4 ±7.8[3]	24.0 ±4.8[3]	46.6 ±4.1	10.3 ±2.2[1,3]	14.9 ±4.2[3,4]
Middle- and long-distance running [3]	19	19.1 ±3.0	1.71 ±0.07[2]	55.8 ±5.5[2]	19.1 ±2.6[2]	45.1 ±4.9	5.1 ±2.5[2,4]	10.6 ±2.4[1,2,4]
Modern pentathlon [4]	14	20.4 ±4.2	1.70 ±0.07[4]	57.5 ±3.8	21.1 ±6.0	46.1 ±2.8	9.6 ±3.3[1,3]	23.4 ±4.2[1,2,3]
Total number	69

^{[1, 2, 3, 4, 5]}Significant differences within male or female groups. Fat free mass was assessed using Durnin-Womersley method