Learn More
Activity patterns were recorded from 51 motoneurons in the fifth lumbar ventral root of cats walking on a motorized treadmill at a range of speeds between 0.1 and 1.3 m/s. The muscle of destination of recorded motoneurons was identified by spike-triggered averaging of EMG recordings from each of the anterior thigh muscles. Forty-three motoneurons projected(More)
The cat hindlimb contains several long, biarticular strap muscles composed of parallel muscle fascicles that attach to short tendons. Three of these muscles--sartorius, tenuissimus, and semitendinosus--were studied by dissecting individual gold-stained fibers and determining the surface distribution of acetylcholinesterase-stained end-plate zones. In each(More)
BACKGROUND Physical activity is important for weight control and good health; however, activity levels decline in the adolescent years, particularly in girls. DESIGN Group randomized controlled trial. SETTING/PARTICIPANTS Middle school girls with English-speaking skills and no conditions to prevent participation in physical activity in 36 schools in six(More)
OBJECTIVES To describe the objectively measured physical activity characteristics of a diverse sample of sixth-grade girls, to examine influences on physical activity, and to report compliance with physical activity guidelines. DESIGN Cross-sectional study. SETTING Six locations across the United States. PARTICIPANTS A total of 1578 sixth-grade girls.(More)
BACKGROUND Research on the metabolic syndrome and its association with lifestyle behaviors in adolescents is important for identifying subgroups of youth at whom interventions should be targeted. OBJECTIVE To examine the relationship of metabolic syndrome with diet and physical activity in US adolescents. DESIGN A sample of 4,450 12- to 19-year-olds was(More)
W ith Ͼ130 million Americans employed across the United States, workplaces provide a large audience for cardiovascular disease (CVD) and stroke prevention activities. Experience has shown that workplace wellness programs are an important strategy to prevent the major shared risk factors for CVD and stroke, including cigarette smoking, obesity, hypertension,(More)
Fine flexible wire microelectrodes chronically implanted in the fifth lumbar ventral root (L5 VR) of 17 cats rendered stable records of the natural discharge patterns of 164 individual axons during locomotion on a treadmill. Fifty-one out of 164 axons were identified as motoneurons projecting to the anterior thigh muscle group. For these axons, the(More)
PURPOSE To assess girls' physical activity (PA) in middle school physical education (PE) as it relates to field site, lesson context and location, teacher gender, and class composition. METHODS We observed girls' PA levels, lesson contexts, and activity promotion by teachers in 431 lessons in 36 schools from six field sites participating in the Trial of(More)
Several cat hindlimb muscles that exhibit differential activation (activity that is restricted to a specific region of muscle) during natural movements were studied to determine the possible roles of 1) non-uniform distribution of histochemically-identified muscle fiber-types (semitendinosus, ST; tibialis anterior, TA) or 2) mechanical heterogeneity (biceps(More)
This study was undertaken to identify nutrition interventions that could provide a basis for designing effective and measurable nutrition education programs for older adults. The authors conducted a literature search of articles published from 1990-2003 using Medline and Agricola. Key words were "elderly," "older adults," "nutrition intervention," and(More)