Table 1. Magnitude (kg), percentage of body mass (%) and time-scale of body weight reduction in Senior England international amateur boxers (n = 82) from 13 weight categories. Data are means (±SD).
Weight category (kg) Number of boxers Days prior to Official weigh-in
21 7 3 1
48 6 3.1 (.7)
(6.5%)		 2.4 (1.0)
(5.0%)		 1.5 (.7)
(3.1%)		 .9 (.5)
(1.9%)
51 5 3.8 (.9)
(7.5%)		 2.8 (.5)
(5.5%)		 2.2 (.2)
(4.3%)		 1.2 (.2)
(2.4%)
54 8 3.6 (.8)
(6.7%)		 2.6 (.8)
(5.1%)		 1.5 (.6)
(2.9%)		 .9 (.3)
(1.7%)
57 7 3.4 (.5)
(6.0%)		 2.5 (.5)
(4.4%)		 1.9 (.5)
(3.3%)		 1.0 (.3)
(1.8%)
60 5 3.8 (1.1)
(6.3%)		 2.8 (.9)
(4.7%)		 2.0 (.7)
(3.4%)		 1.2 (.7)
(2.0%)
*63.5 9 4.8 (.6)
(7.6%)		 3.6 (.6)
(5.7%)		 2.6 (.6)
(4.1%)		 1.4 (.3)
(2.2%)
♦64 4 4.0 (.6)
(6.3%)		 3.3 (.6)
(5.2%)		 2.4 (.4)
(3.8%)		 1.4 (.4)
(2.2%)
*67 6 4.5 (.7)
(6.7%)		 3.7 (.7)
(5.5%)		 2.6 (.5)
(3.9%)		 1.8 (.5)
(2.7%)
♦69 5 4.3 (.7)
(6.2%)		 3.4 (.5)
(4.9%)		 2.4 (.7)
(3.5%)		 1.6 (.5)
(2.3%)
*71 7 4.4 (.5)
(6.2%)		 3.6 (.5)
(5.1%)		 2.7 (.3)
(3.8%)		 1.7 (.5)
(2.4%)
75 9 6.2 (1.5)
(8.3%)		 4.1 (.9)
(5.5%)		 3.1 (.6)
(4.1%)		 1.8 (.3)
(2.4%)
81 5 6.6 (.9)
(8.1%)		 4.2 (.7)
(5.2%)		 2.9 (.2)
(3.6%)		 1.9 (.2)
(2.4%)
91 6 7.4 (1.2)
(8.1%)		 4.7 (1.2)
(5.2%)		 3.2 (1.0)
(3.5%)		 1.9 (.7)
(2.1%)
average 7.0 (±.8%) 5.2 (±.4%) 3.6 (±.4%) 2.2 (±.3%)
[NB: (a) In 2003 rule changes to the weight classification system for Senior amateur boxers resulted in the 63.5 kg, 67 kg and 71 kg categories (*) being replaced by a 64 kg and 69 kg category (♦). (b) Super-heavyweight (91+ kg category) not included as weight manipulation not practised].