The Influence of Physical Activity, Mental Stress and Injury on the Hemostatic Mechanism

摘要: Platelet Numbers. Short periods of strenuous physical activity have been found by most investigators to increase the numbers platelets in peripheral blood (Sarajas et al., 1961; Ikkala 1963; Finkel and Cumming, 1965; Dawson Ogston, 1969; Bennett, 1972; Warlow 1974; Davis etal.,, 1976; Freedman etal., 1977). This finding, however, is not universal: no change platelet count response exercise was reported Prentice associates (1972) or Hyers (1980). Whether alters during prolonged also controversial. Using a semi-quantitative technique for enumeration Isaacs Gordon (1924/25) noted rise men competing marathon race. Mandalaki colleagues (1980) examined effect running on count: comparison between different years they significant when race day extreme heat (25°C), but subjects taking part two run undertaken at temperatures 15 18°C. study demonstrates possible importance exogenous factors points need considerable additional stress induce number circulating platelets. Neither 9.6 km-walk 90 minutes (Bennett, 1972) nor 10-mile march 1961) resulted an count, walk 50 miles over 20 hours did alter (Pegrum 1967).