prt: prt Data (2471 x 9)

In nlmeU: Functions and Data Supporting 'Linear Mixed-Effects Models: A Step-by-Step Approach'

prt Data (2471 x 9)

Description

Data from a Progressive Resistance Randomized Trial.

Usage

prt

Format

A data frame with 2471 rows and 9 columns:

id

A factor with 63 levels: 5, 10, 15, 20, 25, ..., 520 (subject id)

prt.f

A factor with 2 levels: High, Low, i.e., training (intervention) intensity

age.f

A factor with 2 levels: Young, Old (stratifying variable)

sex.f

A factor with 2 levels: Female, Male (stratifying variable)

bmi

A numeric vector with values of BMI at baseline ranging from 18.36 to 32.29

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

Details

Data frame prt was obtained by merging prt.subjects and prt.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.

See Also

prt.fiber, prt.subjects

Examples

data(prt, package = "nlmeU")
summary(prt)

nlmeU documentation built on Aug. 25, 2025, 5:12 p.m.