R: Shoulder flexibility in swimmers

Shoulder

R Documentation

Shoulder flexibility in swimmers

Description

This dataset gives the flexibility for the right and left shoulders in 15 swimmers and 15 sedentary people.

Usage

data(Shoulder)

Format

A dataframe with 30 rows and 4 columns.

[,1]	Subject	factor	anonymous subjects
[,2]	Group	factor	swimmer or control
[,3]	Right	numeric	right shoulder flexibility (deg.)
[,4]	Left	numeric	left shoulder flexibility (deg.)

Source

Private communication. Karine Monteil, CRIS, Lyon 1 University, FRANCE.

References

Monteil, K., Taiar, R., Champely, S. and Martin, J. (2002) Competitive swimmers versus sedentary people: a predictive model based upon normal shoulders flexibility. Journal of Human Movement Studies, 43 , 17-34.

Examples

data(Shoulder)

# Is there some heteroscedasticity?
with(Shoulder,plot(paired(Left,Right)))

# Swimmers are indeed quite different
with(Shoulder,plot(paired(Right,Left),groups=Group))

# A first derived variable to compare the amplitude in flexibilty
with(Shoulder,boxplot(((Left+Right)/2)~Group,ylab="mean shoulder flexibility"))

# A second derived variable to study shoulder asymmetry
with(Shoulder,boxplot((abs(Left-Right))~Group,ylab="asymmetry in shoulder flexibility"))