 Logo of jathtrainLink to Publisher's site J Athl Train. 2003
Oct-Dec; 38(4): 311–314. PMCID: PMC314389  Ground Reaction
Forces Among Gymnasts and Recreational Athletes in Drop Landings
To compare vertical ground reaction forces among gymnasts and
recreational athletes during drop landings from 30-, 60-, and
90-cm heights.  Design and Setting:  Two subject groups,
intercollegiate gymnasts and college-aged recreational athletes,
participated in this study. Subjects completed 10 landing trials
onto a force platform at each height.   Ten female competitive
gymnasts (height = 1.57 ± 0.02 m, mass = 55.4 ± 7.3 kg) and 10
female recreational athletes (height = 1.63 ± 0.06 m, mass =
59.6 ± 4.9 kg) volunteered for this study.   Measurements of
first peak-force magnitude (F1), time to F1 (T1), impulse to F1,
second peak-force magnitude (F2), time to F2 (T2), and impulse
to F2 were compiled to describe the ground reaction force
profile for each trial at 30-, 60-, and 90-cm platform heights.
A 2 × 3 (group × height) m