ice: Cooling muscles with ice

In fastR: Foundations and Applications of Statistics Using R

Description

This data set contains the results of an experiment comparing the efficacy of different forms of dry ice application in reducing the temperature of the calf muscle.

Details

The 12 subjects in this study came three times, at least four days apart, and received one of three ice treatments (cubed ice, crushed ice, or ice mixed with water). In each case, the ice was prepared in a plastic bag and applied dry to the subjects calf muscle. The temperature measurements were taken on the skin surface and inside the calf muscle (via a 4 cm long probe) every 30 seconds for 20 minutes prior to icing, for 20 minutes during icing, and for 2 hours after the ice had been removed. The temperature measurements are stored in variables that begin with B (baseline), T (treatment), or R (recovery) followed by a numerical code for the elapsed time formed by concatenating the number of minutes and seconds. For example, R1230 contains the temperatures 12 minutes and 30 seconds after the ice had been removed.

Variables include

• Subject identification number

• Sex a factor with levels female male

• Weight weight of subject (kg)

• Height height of subject (cm)

• Skinfold skinfold thickness

• Calf calf diameter (cm)

• Age age of subject

• Location a factor with levels intramuscular surface

• Treatment a factor with levels crushed cubed wet

• B0 baseline temperature at time 0

• B30 baseline temperature 30 seconds after start

• B100 baseline temperature 1 minute after start

• B1930 baseline temperature 19 minutes 30 seconds start

• T0 treatment temperature at beginning of treatment

• T30 treatment temperature 30 seconds after start of treatment

• T100 treatment temperature 1 minute after start of treatment

• T1930 treatment temperature 19 minutes 30 seconds after start of treatment

• R0 recovery temperature at start of recovery

• R30 recovery temperature 30 seconds after start of recovery

• R100 recovery temperature 1 minute after start of recovery

• R12000 recovery temperature 120 minutes after start of recovery

Source

Dykstra, J. H., Hill, H. M., Miller, M. G., Michael T. J., Cheatham, C. C., and Baker, R.J., Comparisons of cubed ice, crushed ice, and wetted ice on intramuscular and surface temperature changes, Journal of Athletic Training 44 (2009), no. 2, 136–141.

Examples

data(ice)
xyplot(Weight ~ Skinfold, groups=Sex, data=ice, auto.key=TRUE)

fastR documentation built on May 1, 2019, 11:18 p.m.