TABLE 3.

Comparison of Mean Error (ME, bpm) for selected HRmax prediction formulae in subgroups.

	Previous studies					Present study
	Tanaka 208-0.7* age	Haskell 220–age	Londeree 206.3-0.711*age	Inbar 205.8–0.685 *age	Nes 211–0.64 *age	Simple regression 202.5–0.53*age	Stepwise regression formula
All	0.89	–0.01	3.00	2.53	–4.32	0.25	0.22
BMI < 20	–1.66	–3.91	0.39	0.05	–6.61	–1.55	–1.84
BMI 20–25	1.13	–0.08	3.23	2.79	–4.03	0.66	0.36
BMI > 25	0.77	0.82	2.91	2.36	–4.65	–0.40	0.23
Fitness level 1	0.52	–0.23	2.63	2.16	–4.73	–0.21	0.36
Fitness level 2	1.22	0.30	3.33	2.87	–4.00	0.60	0.50
Fitness level 3	0.95	–0.10	3.05	2.61	–4.24	0.39	–0.21
Male	1.14	0.34	3.25	7.78	–4.11	0.44	0.30
Female	–0.39	–1.90	1.69	1.28	–5.49	–0.69	–0.24
Treadmill	1.30	0.32	3.40	2.95	–3.91	0.70	0.36
Cycle ergometer	–0.35	–1.03	1.77	1.29	–5.61	–1.11	–0.22
Age
<20	–2.44	–8.90	–0.53	–0.51	–6.54	0.01	0.30
20–29	–1.70	–5.94	0.29	0.12	–6.25	–0.48	–0.39
30–39	0.45	–1.09	2.54	2.13	–4.64	0.17	0.09
40–49	3.15	4.15	5.33	4.70	–2.45	1.46	1.33
50–59	0.55	4.61	2.84	1.95	–5.66	–2.84	–2.66
60	–0.07	7.00	2.33	1.18	–6.88	–5.12	–4.65
Female body fat
<14%	–3.10	–5.08	–1.04	–1.41	–8.11	–3.15	–0.64
14–20%	–0.26	–2.03	1.81	1.43	–5.31	–0.42	0.20
21–24%	0.62	–0.81	2.70	2.29	–4.50	0.27	0.17
≥25%	–0.91	–2.06	1.18	0.74	–6.09	–1.42	–1.38
Male body fat
<6%	–0.79	–2.17	1.30	0.88	–5.92	–1.17	–1.92
6–14%	0.07	–1.37	2.16	1.74	–5.04	–0.27	–0.34
15–18%	2.03	1.09	4.13	3.67	–3.19	1.41	1.07
19–25%	1.85	1.87	3.99	3.44	–3.56	0.69	0.60
≥25%	–3.60	–3.04	–1.44	–2.03	–9.12	–5.06	–3.55