Table 1.

Running speed and the heart rate of the amateur ultra-marathon runners during sequential courses of the 100 km run (^*p ≤ 0.05)

	V [m/s]				HR [bpm]				% HRmax
Group	0–25 km	26–50 km	51–75 km	76–100 km	0–25 km	26–50 km	51–75 km	76–100 km	0–25 km	26–50 km	51–75 km	76–100 km
Total	2.9 ± 0.2*1–3,4	2.7 ± 0.27*2–4	2.6 ± 0.36	2.4 ± 0.3	145 ± 7.5	148 ± 6.55*2–4	143 ± 5.78	137 ± 3.89	78 ± 4.27	80.0 ± 3.65*2–4	78 ± 2.75	74 ± 2.07
A	3.00 ± 0.151–4	2.81 ± 0.14	2.82 ± 0.12	2.43 ± 0.37	146 ± 8.76	149 ± 8.51	146 ± 6.7	139 ± 3.69	78 ± 6.08	79 ± 5.44	78 ± 4.35	74 ± 3.17
B	2.93 ± 0.18*1–3,4	2.71 ± 0.28	2.53 ± 0.3	2.37 ± 0.3	144.3± 7.34	147 ± 5.55	141 ± 4.26	136 ± 3.67	79 ± 3.09	80 ± 2.38	77 ± 1.43	75 ± 1.26
A1	3.06 0.15*1–4	2.88 ± 0.17	2.83 ± 0.17	2.58 ± 0.26	142 ± 4.69	145 ± 3.67	142 ± 3.02	137 ± 2.68	77 ± 4.45	78 ± 3.69	77 ± 2.95	74 ± 2.53
B1	2.88 0.17*1–3,4	2.60 ± 0.23*2–4	2.38 ± 0.22	2.21 ± 0.26	149 ± 9.33	152 ± 8.41	144 ± 9.0	138 ± 5.56	81 ± 2.15	82 ± 1.79*2–4	79 ± 2.35	75 ± 0.5

^*significant differences between particular phases of the run

(1 - rest, 2 – 25 km, 3 – 50 km, 4 – 75 km, 5 – 100 km)