Does box jumping work? In a research paper published in the Journal of Applied Sport Science Research in 1992, the authors detailed the results of a six-week study on the effects of various combinations of plyometrics and squatting on the vertical jump. The subjects who did just the squat increased their vertical jump by 1.3 inches, and the subjects who did just plyometrics increased their vertical jump by 1.5 inches. However, the subjects who performed both squats and plyometrics increased their vertical jump by 4.2 inches! You might call this a Gestalt training effect, as the whole (plyos and squatting combined) is more than the sum of its parts (plyos and squatting performed separately).
Resources
http://www.charlespoliquin.com/ArticlesMultimedia/Articles/Article/471/Very_Dumb_Training_Recommendations_Part_7.aspx
