Measures of body composition (total body mass, body fat, % body fat, lean mass, and % lean mass) both pre- and post-training.
NMRAn object of class data.frame with 282 rows and 19 columns:
character; randomly generated 8-digit identifier used in linkage to phenotypic data. All samples from the same animal have the same PID.
character; unique ID used for each rat at the Iowa PASS.
factor; the age of the rat at the beginning of the training protocol. Levels: "6M" (Adult) and "18M" (Aged).
factor; the sex of the rat with levels "Female" and "Male".
factor; exercise training group. Either "SED" (sedentary) or the number of weeks of training ("1W", "2W", "4W", "8W").
POSIXct, POSIXt; the day when the pre-training NMR body composition measures were recorded.
numeric; body mass (g) recorded on the same day as NMR body composition measures (pre-training).
numeric; fat mass (g) recorded via NMR (pre-training).
numeric; lean mass (g) recorded via NMR (pre-training).
numeric; percent fat mass (pre-training). Calculated as
pre_fat / pre_body_mass * 100.
numeric; percent lean mass (pre-training). Calculated
as pre_lean / pre_body_mass * 100.
numeric; percent fluid mass (pre-training).
POSIXct, POSIXt; the day when the post-training NMR body composition measures were recorded.
numeric; body mass (g) recorded on the same day as NMR body composition measures (post-training).
numeric; fat mass (g) recorded via NMR (post-training).
numeric; lean mass (g) recorded via NMR (post-training).
numeric; percent fat mass (post-training). Calculated
as post_fat / post_body_mass * 100.
numeric; percent lean mass (post-training). Calculated
as post_lean / post_body_mass * 100.
numeric; percent fluid mass (post-training).
head(NMR)
#> pid iowa_id age sex group pre_day pre_body_mass pre_fat pre_lean
#> 1 10043527 06F8T1 6M Female SED 2018-07-25 181.2 20.2944 109.2636
#> 2 10043799 06F8T3 6M Female SED 2018-07-25 179.0 19.1530 105.9680
#> 3 10043950 06F8T4 6M Female SED 2018-07-25 174.4 19.1840 103.2448
#> 4 10044094 06F8T5 6M Female SED 2018-07-25 181.2 20.4756 105.4584
#> 5 10044337 06F8T8 6M Female SED 2018-07-25 185.2 21.2980 108.8976
#> 6 10044418 06F8T9 6M Female SED 2018-07-25 178.3 20.1479 104.1272
#> pre_fat_pct pre_lean_pct pre_fluid_pct post_day post_body_mass post_fat
#> 1 11.2 60.3 9.5 2018-09-26 199 23.283
#> 2 10.7 59.2 9.6 2018-09-30 203 28.826
#> 3 11.0 59.2 10.0 2018-09-30 202 31.310
#> 4 11.3 58.2 9.7 2018-09-26 190 25.840
#> 5 11.5 58.8 10.1 2018-09-26 205 30.545
#> 6 11.3 58.4 9.6 2018-09-27 191 26.167
#> post_lean post_fat_pct post_lean_pct post_fluid_pct
#> 1 118.604 11.7 59.6 10.0
#> 2 113.071 14.2 55.7 9.3
#> 3 112.312 15.5 55.6 9.8
#> 4 108.870 13.6 57.3 10.1
#> 5 112.340 14.9 54.8 9.7
#> 6 110.016 13.7 57.6 9.7