Effects of physical training on stuttering.
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Adaptation, Physiological↗
Biomedical subjects
B D Franks
Publications and source records attributed to B D Franks.
Orthogonal factors of cardiac intervals and their response to stress.
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Blood Pressure↗
Athletics and cardiovascular health.
The heart includes systolic and diastolic components. The immediate effects of physical activity include increased sympathetic nervous and related hormonal activity; increased heart rate, contractility, stroke volume, and cardiac output. The time for systole and diastole are reduced, with relatively more work per beat. Light activity prior to the following strenuous exertion enhances performance, safety, and recovery. Children, women, and men show similar responses to activity: acute stress, with long-term improvements in cardiovsacular function. There is no cardiovascular reason for restricting activity for children or women. Mental and/or emotional stressors cause similar stress reactions, without the potential long-range benefits of regular physical activity. Athletics is viewed as an optional part of a lifetime of regular, vigorous activity, and as such can make a contribution to one's cardiovascular fitness. From this viewpoint, there is no need to put one in the stressful athletic situation until adequate pre-conditioning has taken place. Neither is there a place for inactive promoters of athletics for its own sake.
Age Factors↗
Physical activity and blood pressure responsiveness to the cold pressor test in normotensive young adult African-American males.
The aim of our study was to examine whether there is an association between blood pressure reactivity to the cold pressor test in African Americans who engaged in different levels of physical activity. We examined the systolic pressure, diastolic pressure, mean arterial blood pressure, heart rate, cardiac index, total peripheral resistance, and forearm blood flow during a two-minute cold pressor test in 15 aerobic, physically active and 15 physically inactive, normotensive young adult African-American males. Peak oxygen consumption varied as a function of physical activity, and was significantly higher in the physically active than in the physically inactive subjects (54.5 +/- 1.5 vs 36.8 +/- 0.7 ml kg(-1) min(-1)) (P<.05). During the cold pressor test, consisting of immersing the foot in ice water, the change in cardiovascular responses were similar between the physically active and the physically inactive groups. These results suggest that regular physical activity may not contribute to an attenuated blood pressure response to behavioral stress of the cold pressor test in normotensive young adult African-American males.
Adolescent↗