|The Effects of Warm-Up Stretching in the Golf Swing|
R E S U L T S
Parameters were chosen to represent both biomechanics skill in performing the golf swing as well as power production. The parameters that were chosen included the peak rotation of each of the body segments (hips, shoulders, arms). It was defined as maximum angular displacement and marked transition between clockwise rotation (backswing) and counter-clockwise rotation (downswing). Maximum angular separation between the hip segment and the shoulder segment was also chosen. To represent segment coodination and the amount of power production during the downswing, peak angular speeds were chosen for the body segmentes and the club shaft (lag release). Club shaft angular speed at impact was also recorded.
For the two stretching groups, values for each of the measurement parameters were recorded for both the stretching test trials and the non-stretching test trials. Comparisons were made between the non-stretching and stretching tests using the first swing of the five trials collected for each test. The control group measurement parameters were recorded for both non-stretching tests. Comparisons were made randomly between the first and second non-stretching tests. Comparisons were made randomly between the first and second non-stretching tests using the first swing of the five trials collected for each test. Table 1 shows the absolute changes in the parameters.
A positive value indicates an increase from the non-stretch test to the stretch test. A negative value indicates a decrease in the parameter from non-stretch to stretch test. Table 2 shows the relative (percent) changes in the parameters. The absolute change in each parameter for each subject from the non-stretch to stretch test was divided by the value of the non-stretch test.