Biomedical subjects

P Lasko-McCarthey

Publications and source records attributed to P Lasko-McCarthey.

4 recordsLinked to original sources

PubMed1991

Effect of work rate increment on peak oxygen uptake during wheelchair ergometry in men with quadriplegia.

The purpose of this study was to determine the effect of work rate increment on peak oxygen uptake (VO2 peak) during wheelchair ergometry (WCE) in men with quadriplegia due to cervical spinal cord injuries (CSCI). Twenty-two non-ambulatory subjects (aged 20-38 years) with CSCI were divided into two groups based on wheelchair sports classification (n = 12 for IA group and n = 10 for IB/IC group). Subjects underwent three different, continuous graded exercise tests (spaced at least 1 week apart) on an electronically braked wheelchair ergometer. Following a 3-min warmup, the work rate was increased 2, 4, or 6 W.min-1 for the IA group and 4, 6, or 8 W.min-1 for the IB/IC group. Ventilation and gas exchange were measured breath-by-breath with a computerized system. Repeated-measures ANOVA showed no significant difference among the three protocols for VO2 peak in the IA group (P greater than 0.05). The mean (SD) VO2 peak values (ml.kg-1.min-1) were 9.3 (2.4), 9.4 (3.2), and 8.4 (2.6) for the 2, 4, and 6 W.min-1 protocols, respectively. In contrast, the IB/IC group showed a significant difference among the protocols for VO2 peak (P less than 0.05). The mean (SD) VO2 peak values (ml.kg-1,min-1) were 15.1 (4.0), 14.1 (4.4), and 12.7 (4.0) for the 4, 6, and 8 W.min-1 protocols, respectively. Post hoc analysis revealed a difference between the 4 and 8 W.min-1 protocols. Our results suggest that graded exercise testing of men with quadriplegia due to CSCI, using WCE, should employ work rate increments between 2 and 6 W.min-1 and that work rate increments of 8 W.min-1 or greater will result in an underestimate of VO2 peak.

Adult↗

PubMed1991

Protocol dependency of VO2max during arm cycle ergometry in males with quadriplegia.

The purpose of this study was to determine whether maximal oxygen uptake (VO2max) is protocol dependent during arm cycle ergometry (ACE) for quadriplegic males with spinal cord injuries (SCI). Twenty-four non-ambulatory subjects (aged 20-38 yr) with cervical SCI were divided into two groups based on wheelchair sports classification (IA group = 14; IB/IC group = 10). They underwent three different, continuous graded exercise tests spaced at least 1 wk apart on an electronically braked arm cycle ergometer. Following a 3-min, unloaded warm-up at 60 rpm, the work rate was increased 2, 4, or 6 W.min-1 for the IA group and 4, 6, or 8 W.min-1 for the IB/IC group. Ventilation and gas exchange were measured breath-by-breath with a SensorMedics 4400 computerized system. Repeated-measures ANOVA showed no significant difference among the three protocols for VO2max in the IA group (P greater than 0.05). The mean (+/- SD) VO2max values (ml.kg-1.min-1) were 10.8 (+/- 3.4), 11.0 (+/- 2.7), and 10.2 (+/- 2.9) for the 2, 4, and 6 W.min-1 protocols, respectively. In contrast, the IB/IC group showed a significant difference among the protocols for VO2max (P less than 0.05). The mean (+/- SD) VO2max values (ml.kg-1.min-1) were 16.8 (+/- 4.5), 15.3 (+/- 4.3), and 14.6 (+/- 4.3) for 4, 6, and 8 W.min-1, respectively. Post hoc analysis revealed a difference between the 4 and 8 W.min-1 protocols. Our results suggest that graded exercise testing of SCI persons with quadriplegia, using ACE, should employ work rate increments between 2-6 W.min-1 and that work rate increments of 8 W.min-1 or greater will underestimate VO2max.

Adult↗

PubMed1990

Kinematic variability and relationships characterizing the development of walking.

The purposes of this study were: (1) to determine the pattern of variability and relationships in joint kinematics characterizing the development of walking and (2) to determine whether controlling for postural stability in new walkers results in less variability. The variability and relationships among hip, knee, and ankle motions were measured during 10 gait cycles of new walkers, supported new walkers, two-year-olds and seven-year-olds. Fourier series were generated for each joint motion and standard deviations were compared across groups. An age-related decline in variability was evident in select portions of the cycle. Stance and swing phase duration correlated with cycle duration for all ages. Postural support did not lessen variability in joint rotations for new walkers. Cross-correlations for hip-knee, knee-ankle, and hip-knee rotations were strong across all groups. These results suggest that a coordinative structure for walking produces strong intralimb coupling early in development, despite variability in select portions of joint motions.

Child↗

PubMedDate not supplied

Exercise options for persons with diabetic complications.

Exercise is a cornerstone in the management of diabetes, yet many persons with diabetes fail to participate in basic physical activity due to secondary diabetic complications. This inactivity can lead to disuse syndrome--a deterioration of functional capacity. Disuse syndrome, coupled with diabetes, can produce significant physiological problems and further disability. This review provides the health educator with information about the pathology and role of exercise for persons with diabetic complications. Examples of exercise to minimize disuse syndrome are given for individuals with peripheral vascular disease, retinopathy, neuropathies, and nephropathy.

Diabetes Complications↗