Biomedical subjects

Scott Hasson

Publications and source records attributed to Scott Hasson.

7 recordsLinked to original sources

PubMed2006

Peak systolic blood pressure on a graded maximal exercise test and the blood pressure response to an acute bout of submaximal exercise.

Blood pressure (BP) is immediately reduced after aerobic exercise (postexercise hypotension [PEH]). Whether peak systolic BP on a maximal graded exercise stress test (GEST) relates to PEH is not known. This study examined associations between peak systolic BP on a GEST and PEH. Subjects were 50 men (mean +/- SEM age 43.8 +/- 1.3 years) with elevated BP (145.3 +/- 1.5/85.9 +/-1.1 mm Hg). Men completed a GEST and 3 experiments: nonexercise control and 2 cycle bouts at 40% (LIGHT) and 60% (MODERATE) of maximal oxygen consumption. After the experiments, subjects left the laboratory wearing ambulatory BP monitors. Peak systolic BP on a GEST was categorized into tertiles: low (n = 17, 197.4 +/- 2.0 mm Hg), medium (n = 16, 218.4 +/- 1.4 mm Hg), and high (n = 17, 248.9 +/- 2.8 mm Hg). Repeated-measures analysis of variance tested if BP differed over time and among experimental conditions and peak systolic BP groups. In men with high peak systolic BP, systolic BP was reduced by 7.3 +/- 2.6 mm Hg after LIGHT and by 5.0 +/- 2.2 mm Hg after MODERATE compared with nonexercise control over 10 hours, with the more apparent effects seen after LIGHT (p <0.05). In men with low peak systolic BP, systolic BP was reduced by 6.3 +/- 2.3 mm Hg after MODERATE compared with nonexercise control over 10 hours (p <0.05). In men with medium peak systolic BP, systolic BP was not different after exercise compared with nonexercise control over 10 hours (p >or=0.05). Men with high peak systolic BP had decreased systolic BP to the greatest extent after LIGHT, whereas men with low peak systolic BP reduced systolic BP after MODERATE. In conclusion, the findings of this study suggest that peak systolic BP on a GEST may be used to characterize which men with hypertension will have decreased systolic BP after acute submaximal aerobic exercise.

Adolescent↗

PubMed2006

Mobility and perceived function after total knee arthroplasty.

Mobility using the timed up and go (TUG) and perceived pain, stiffness, and physical function (Western Ontario McMaster Universities Osteoarthritis Index) were documented after total knee arthroplasty (TKA). The relationships between mobility and perceived function are limited post-TKA. The first purpose of this study was to determine and compare the TUG test between individuals (n = 11) post-TKA and age-sex-related controls (n = 11). The second purpose of this study was to explore the relationships between mobility and self-reported function post-TKA. The TKA group was 28% (P < .05) slower in completing the TUG compared with controls and reported difficulty in attempting challenging tasks. The TUG was moderately related to the physical function (0.63) dimension of the Western Ontario and McMaster Universities Osteoarthritis Index, as well as the aggregate Western Ontario and McMaster Universities Osteoarthritis Index score (0.59).

Activities of Daily Living↗

PubMed2005

Participation in an Older Adult Heart Health Program affects lifestyle behavior.

The Older Adult Heart Health Program (HHP) was a university-based outreach health screen and education program. The purpose of this study was to determine whether the HHP was associated with lifestyle behavior change among participants. HHP volunteers (n=136) were mostly white (98.5%) women (79.4%) with a mean (+/- SEM) age of 75.1+/-0.6 years. A follow-up survey was sent to the participants' homes 4 months after the HHP inquiring about physician office visitation and adoption of healthy lifestyle behaviors since the HHP. A majority (n=60, 64.5%) of those who completed the survey (n=93, 68.4% response rate) indicated they visited their physician after the HHP. A greater percentage of survey respondents who visited their physician made lifestyle behavior changes than those who did not, 71.1% vs. 45.4%, respectively (p=0.032). These findings suggest participating in programs such as the HHP prompt physician visitation and behavior change among older adults residing in the community.

Aged↗

PubMed2005

Time spent moving is related to systolic blood pressure among older women.

Isolated systolic hypertension is present in the majority of older women. Exercise is an attractive antihypertensive lifestyle therapy for older women with isolated systolic hypertension, but the amount of exercise needed to reduce blood pressure (BP) is not clear. Evidence is accumulating that lower levels of physical exertion are associated with decreased BP. The authors sought to determine if BP was related to daily time spent moving. Participants were 109 women (mean +/- SD, 75.2+/-7.2 yr). A majority (63.3%) had hypertension, and 48.6% had isolated systolic hypertension. Systolic BP was lower among women moving > or =5 h/d (142.2+/-18.7 mm Hg) than those moving <5 h/d (149.8+/-19.0 mm Hg) (p=0.038). Multiple regression analysis indicated that the potentially strong confounding effects of antihypertensive medication use, adiposity, and age did not eliminate these favorable associations between daily time spent moving and systolic BP. Older women should be encouraged to regularly engage in physical activities typical of everyday life such as walking because of its BP benefits.

Aged↗

PubMed2005

Adiposity of elderly women and its relationship with self-reported and observed physical performance.

BACKGROUND AND PURPOSE: There is a societal trend toward increasing obesity and a natural tendency for physical performance to decrease with age. Our purpose was to describe the adiposity of elderly women participating in a health screening and to determine the relationship between their adiposity and both observed and self-reported physical performance. METHODS: Subjects were 104 communitydwelling elderly women (74.9+/-7.5 years). Their adiposity was described using body mass index (BMI), waist circumference, and waist to hip ratio. Physical performance was characterized using timed sit-to-stand, unilateral standing, 25-foot walk and the Physical Functioning subscale of the SF-36. Habitual activity was summarized as the number of daily hours patients estimated they spent moving about on their feet. RESULTS: The majority of women had excessive adiposity. Greater adiposity was associated with worse physical performance. Both Pearson correlations and multiple regression revealed BMI to be significantly predictive of all physical performance measures. Age added to the explanation of walking time and unilateral stance time. Time moving about contributed to the explanation of self-reported physical functioning. CONCLUSIONS: Adiposity should be documented as part of the physical therapist examination of elderly women. It may be an appropriate target of intervention if physical performance is limited.

Adipose Tissue↗

PubMed2004

Lower-limb force production in individuals after unilateral total knee arthroplasty.

OBJECTIVE: To determine and compare lower-limb force production during a single-leg horizontal press in involved and uninvolved limbs in people with unilateral total knee arthroplasty (TKA) and the limb of age- and gender-matched subjects. DESIGN: Quasi-experimental, posttest only control group design. SETTING: Subjects living in the community and were tested at a university facility. PARTICIPANTS: Nine people with unilateral TKA and 9 subjects without TKA volunteered. The mean postsurgery time for the TKA group was 15.89+/-6.62 months. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURE: Force production in kilograms during a single-leg press. RESULTS: Lower-limb force production differed significantly between involved and uninvolved limbs (P=.007) for the unilateral TKA group. Lower-limb force production of the involved limb in persons with unilateral TKA was significantly lower than the limb of the age- and gender-matched controls (P=.0001). CONCLUSIONS: Lower-limb force production on the involved side was significantly lower than the uninvolved side. When compared with an age-matched control group, subjects with unilateral TKA produced less force during a single-leg horizontal press.

Activities of Daily Living↗

PubMed2004

Grip strength norms for elderly women.

As part of community health screenings, the grip strength of 113 independently ambulatory women (M age=75.2 +/- 7.3 yr.) was measured. Norms derived from the measurements are presented and compared with (a) norms reported for similar procedures about 20 years ago and (b) values for disabled women.

Aged↗