subject	fat-free-mass	energy-exp
1.000000000e+000	4.930000000e+001	1.894000000e+003
2.000000000e+000	5.930000000e+001	2.050000000e+003
3.000000000e+000	6.830000000e+001	2.353000000e+003
4.000000000e+000	4.810000000e+001	1.838000000e+003
5.000000000e+000	5.760000000e+001	1.948000000e+003
6.000000000e+000	7.810000000e+001	2.528000000e+003
7.000000000e+000	7.610000000e+001	2.568000000e+003