41 – 0.55%. Test-retest reliability studies performed with this DXA machine have previously yielded mean coefficients of variation for total bone mineral content and total fat free/soft tissue mass of 0.31 – 0.45% with a mean intra-class correlation of 0.985 [31]. Resting energy expenditure Resting energy expenditure (REE) was assessed using a ParvoMedics TrueMax 2400 Metabolic Measurement System (ParvoMedics, Inc., Sandy, UT). This test was a non-exertional test performed in a fasted state with the participants lying supine on an exam table. A

clear, hard plastic hood and soft, clear plastic drape was placed over the participants’ neck and head in order to determine resting AZD6244 price oxygen uptake and energy expenditure. All participants remained motionless without falling Fosbretabulin nmr asleep for approximately 20 minutes. Data were recorded after the first ten minutes of testing during a five minute Selleckchem LGX818 period of time in which criterion variables (e.g., VO2 L/min) changed less than 5%. Test-retest measurements on 14 participants from a study previously reported [20] revealed that test-retest correlations (r) of collected VO2 in l/min ranged

from 0.315 – 0.901 and coefficient of variation ranged from 8.2% – 12.0% with a mean intra-class coefficient of 0.942, p < 0.001. Anthropometrics Active range of motion for right/left knee extension and flexion was measured with a standard 12"" goniometer to determine knee range of motion. The participant was made to lie supine with one leg extended and the other leg bent with the heel resting on table. The extended leg was measured for knee extension. Next, the measurement of the same leg was measured for flexion range of motion by having the participant raise the extended leg slightly off the table and bring the heel toward the gluteus maximus. These procedures were repeated on the opposite leg. Test to test reliability of performing these tests were 0.75-0.98. Knee circumference was measured as a general indicator of knee inflammation/swelling. The participant lied supine with one leg extended and the other leg bent

with the heel resting on table. The circumference of the extended leg was measured Megestrol Acetate and then repeated on the opposite leg. Measurements were performed utilizing a Gulick anthropometric tape (Model J00305, Lafayette Instruments, Lafayette, IN) at the joint line of both knees. Test to test reliability of performing these tests were 0.86-0.92. Exercise capacity Resting heart rate was determined by palpitation of the radial artery using standard procedures [32]. Blood pressure was assessed by auscultation of the brachial artery using a mercurial sphygmomanometer using standard clinical procedures [32]. Resting heart rate and blood pressure measurements were taken on the participant in the supine position after resting for 5-min.