Circadian rhythms in exercise performance: Implications for hormonal and muscular adaptation. the width is 5 Effects of Plyometric Training on Components of Physical Fitness in Prepuberal Male Soccer Athletes: The Role of Surface Instability. Teo, W., Newton, M.J., & McGuigan, M.R. var months = new Array ("January","February","March","April","May","June","July","August","September","October","November","December")