ACL Anterior cruciate ligament
ANOVA Analysis of variance
AUG augmentation mode
BMC Bone Mineral Content
BMD Bone Mineral Density
CKC closed kinetic chain
CON control group
CRES Contingency Resistance Exercise System mode
CSA cross-sectional area
DCRE Dynamic Constant Resistive Exercise
DESC Dutch Experiment Support Center
DEXA Dual Energy X-ray Absorptiometry
DL deadlift
ECG Electro Cardiograph
EMG Electromyography
EVA extravehicular activity
EXL Exercise Physiology Laboratory
FW free weight
g gravitational acceleration
GE General Electric
HR heel raise
HRB heel raise block
HTSF Human Test Subject Facility
ID subject identification number
IRB Institutional Review Board
IRED interim Resistance Exercise Device
iRED3 iRED training group, 3 sets
iRED6 iRED training group, 6 sets
ISS International Space Station
JSC Lyndon B Johnson Space Center
L Lumbar vertebrae
Mid- mid-training
MRI Magnetic Resonance Imaging
n number of subjects
NASA National Aeronautics and Space Administration
OHPR Hydroxyproline
OKC Open kinetic chain
1RM one repetition maximum
Post- post-training
Pre- pre-training
RED Resistance Exercise Device
REPS repetitions
RM repetition maximum
ROM range of motion, deflection
SE standard error
SQ squat
STS Space Transportation System, Space Shuttle
TVIS Treadmill vibration isolation system
USRA Universities Space Research Association
m g microgravity
VU Vrije Universiteit
WB whole body