. Author manuscript; available in PMC: 2013 Jul 31.

Published in final edited form as: Med Sci Sports Exerc. 2012 Apr;44(4):709–715. doi: 10.1249/MSS.0b013e3182366f6c

Table 1.

Subject characteristics.

	All Subjects N=57	CALERIE Study N=43	CREG Study N=14	P-Value

Age, y	55.8 ± 3.5	55.9 ± 3.3	55.5 ± 4.3	0.73
Sex, % female	67	63	79	0.28
BMI, kg/m²	27.6 ± 2.0	27.4 ± 2.1	28.2 ± 1.8	0.22
PRAL, mEq/day	8.2 ± 17.3	6.6 ± 16.0	13.2 ± 20.6	0.21
VO₂max, L/min	2.05 ± 0.54	2.07 ± 0.55	1.98 ± 0.53	0.59
VO₂max, ml/kg/min	25.5 ± 4.7	26.0 ± 4.6	24.1 ± 5.0	0.19
HR_max, beats/min	169 ± 7	169 ± 12	171 ± 13	0.56
HR_max, % of predicted HR_max	100 ± 7	100 ± 7	101 ± 7	0.59
Exercise test duration, min	9.2 ± 1.5	9.1 ± 1.5	9.3 ± 1.7	0.72

Values are means ± SD except for sex data, which are presented as percentages. P-values are from independent t-tests comparing data from the CALERIE and CREG studies except for P-values for sex, which is from a Chi-square analysis. BMI, body mass index; PRAL, potential renal acid load of the diet (mEq/day) calculated based on nutrient analysis of 3- or 7-day food diaries; VO₂max, maximal oxygen uptake; HR_max, maximal heart rate.