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  • Author: Michael J. Pavol x
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Adrienne J. McNamara, Michael J. Pavol and Katherine B. Gunter

Objective:

Community-based exercise programs are popular for achieving physical activity among older adults, but the amount of physical activity obtained through such programs is unknown. This study quantified the bone-loading forces and levels of cardiovascular activity associated with participation in “Better Bones and Balance” (BBB), a community-based fall- and fracture-prevention program for older adults.

Methods:

Thirty-six postmenopausal women age 73.2 ± 7.6 yr engages in BBB participated in this study. Ground-reaction forces (GRFs) associated with BBB exercises were evaluated using a force platform. Session and weekly totals of minutes of moderate to vigorous physical activity (MVPA) and total time spent above 55% maximum heart rate (HR) were measured using accelerometers and HR monitors, respectively.

Results:

BBB exercises produced mean 1-leg GRFs of 1.4–2.2 units body weight. Weekly BBB participation was associated with 126 ± 31 min of MVPA.

Conclusion:

Activity obtained by BBB participation meets recommended guidelines for skeletal and cardiovascular health.

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Stamatis Agiovlasitis, Jeffrey A. McCubbin, Joonkoo Yun, Michael J. Pavol and Jeffrey J. Widrick

This study examined whether the net rate of oxygen uptake (VO2net) and the net oxygen uptake per kilometer (VO2net/km) are affected during walking in adults with Down syndrome (DS) and whether their preferred walking speed (PWS) minimizes the VO2net/km. Respiratory gases were collected as 14 adults with DS and 15 adults without DS completed a series of treadmill walking trials. PWS was measured over 15 meters in a hallway. The VO2net and the VO2net/km were higher in adults with DS than adults without DS. The overground PWS normalized for leg length was the same for both groups and did not appear to minimize the VO2net/km. Thus, adults with DS are less economical during walking than adults without DS. The overground PWS does not minimize the metabolic cost during treadmill walking.

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Tammy M. Owings, Michael J. Pavol, Kevin T. Foley, Penny C. Grabiner and Mark D. Grabiner