Weight and body-composition change during the college freshman year in male general-population students and Army Reserve Officer Training Corps (ROTC) cadets.
OBJECTIVE
To examine relationships between changes in body weight, body composition, and fitness level in male students of the general population and those in the Army Reserve Officer Training Corps (ROTC) program during the freshman year of college.


METHODS
Thirty-seven (18.4 ± 0.7 yr) healthy, nonsmoking, first-semester-resident male students were divided into 3 groups: low active (LA), high active (HA), and ROTC. Baseline (beginning of freshman year) and 6-month follow-up measurements included anthropometry, body composition (by DXA), 3-day food records, and physical activity (PA) assessment.


RESULTS
Weight and body-mass index did not change significantly within or among groups. HA participants compared with LA and ROTC had a significant decrease in body fat (-1.6% ± 2.5% vs. 1.9% ± 1.2% and 0.8% ± 2.2%, respectively). They also had a significant increase in lean mass compared with LA and ROTC (1.8 ± 1.1 kg vs. -0.2 ± 2.0 kg and 0.2 ± 1.7 kg, respectively). All p values were <.05. ROTC and LA participants were similar in all measures of body composition and PA and had significantly lower PA levels than the HA group. No significant relationships were observed between dietary variables and body-composition changes.


CONCLUSIONS
These results suggest that higher PA was the most powerful determinant in achieving favorable body-composition outcomes. In addition, current physical training conducted by ROTC at Florida State University (which seems to be a practice nationwide) might not be sufficient to offset gains in body fat.
US Army Research Institute of Environmental Medicine, Military Nutrition Division, Natick, MA, USA.
Aaron P
AP
Crombie
Pei-Yang
PY
Liu
Michael J
MJ
Ormsbee
Jasminka Z
JZ
Ilich
D015502:Absorptiometry, Photon; D050154:Adiposity; D000293:Adolescent; D000328:Adult; D001823:Body Composition; D015992:Body Mass Index; D015930:Diet Records; D002149:Energy Intake; D015444:Exercise; D005431:Florida / Q000453:epidemiology; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008889:Military Personnel / Q000193:education; D050177:Overweight / Q000453:epidemiology / Q000517:prevention & control*; D010809:Physical Fitness; D012306:Risk; D064133:Sports Nutritional Physiological Phenomena; D014495:Universities; D015430:Weight Gain; D015431:Weight Loss; D055815:Young Adult