prt.fiber Data (2471 x 5)

Data from a Progressive Resistance Randomized Trial.

Format

The prt.fiber data frame has 2471 rows and 5 columns. Each row in the data corresponds to one muscle fiber collected during muscle biopsy. See prt data frame for the description of the study design.

id

a factor with 63 levels 5, 10, 15, 20, 25, ..., 520

iso.fo

a numeric vector with values of isometric force ranging from 0.16 to 2.565

spec.fo

a numeric vector with values of specific force ranging from 80.5 to 290

occ.f

a factor with 2 levels Pre, Pos, i.e. pre- and post- intervention

fiber.f

a factor with 2 levels Type 1, Type 2, i.e. Type 1 and Type 2 muscle fiber.

Source

Claflin, D.R., Larkin, L.M., Cederna, P.S., Horowitz, J.F., Alexander, N.B., Cole, N.M., Galecki, A.T., Chen, S., Nyquist, L.V., Carlson, B.M., Faulkner, J.A., & Ashton-Miller, J.A. (2011) Effects of high- and low-velocity resistance training on the contractile properties of skeletal muscle fibers from young and older humans. Journal of Applied Physiology, 111, 1021-1030.

Details

PRT trial was aimed for devising evidence-based methods for improving and measuring the mobility and muscle power of elderly men and women

See also

prt, prt.subjects

Examples

summary(prt.fiber)
#>        id           iso.fo          spec.fo      occ.f        fiber.f    
#>  15     :  48   Min.   :0.1600   Min.   : 80.5   Pre:1228   Type 1:1299  
#>  50     :  46   1st Qu.:0.6490   1st Qu.:135.3   Pos:1243   Type 2:1172  
#>  25     :  44   Median :0.8280   Median :155.2                           
#>  95     :  44   Mean   :0.8783   Mean   :157.2                           
#>  10     :  43   3rd Qu.:1.0430   3rd Qu.:176.4                           
#>  5      :  41   Max.   :2.5650   Max.   :290.0                           
#>  (Other):2205