﻿116 
  

  

  Mr. 
  W. 
  J. 
  Young 
  and 
  others. 
  Effect 
  of 
  

  

  recorded 
  in 
  Table 
  II. 
  The 
  figures 
  indicate 
  that 
  the 
  blood 
  pressure 
  was 
  raised 
  

   to 
  a 
  greater 
  extent 
  by 
  violent 
  exercise 
  of 
  short 
  duration 
  than 
  by 
  a 
  prolonged 
  

   and 
  less 
  strenuous 
  effort. 
  In 
  the 
  former 
  series 
  of 
  experiments 
  the 
  blood 
  

   pressure 
  began 
  to 
  fall 
  immediately 
  after 
  the 
  cessation 
  of 
  exercise, 
  and 
  

   returned 
  within 
  a 
  comparatively 
  short 
  time 
  (about 
  ten 
  minutes) 
  to 
  the 
  

   original. 
  In 
  the 
  case 
  of 
  prolonged 
  exercise 
  the 
  blood 
  pressure 
  rose 
  at 
  first 
  

   considerably, 
  and 
  afterwards 
  continued 
  to 
  rise 
  very 
  gradually 
  or 
  even 
  

   remained 
  stationary. 
  In 
  some 
  instances 
  the 
  initial 
  rise 
  was 
  followed 
  by 
  a 
  

   fall 
  to 
  the 
  normal, 
  or 
  sometimes 
  even 
  to 
  a 
  sub-normal 
  figure. 
  The 
  curves 
  in 
  

   the 
  chart 
  illustrate 
  this 
  fact 
  clearly. 
  This 
  fall 
  in 
  pressure 
  is 
  probably 
  due 
  to 
  

   the 
  dilatation 
  of 
  the 
  cutaneous 
  blood 
  vessels 
  brought 
  about 
  by 
  the 
  high 
  

   temperature 
  of 
  the 
  skin. 
  

  

  Table 
  II. 
  

  

  No. 
  

  

  Subject. 
  

  

  Nature 
  of 
  exercise. 
  

  

  Blood-pressure 
  (mm.). 
  

  

  Before. 
  

  

  Immediately 
  

   after 
  

  

  After 
  n 
  minutes. 
  

  

  1 
  

  

  2 
  

   3 
  

   4 
  

   5 
  

   6 
  

   7 
  

   8 
  

  

  9 
  

   10 
  

   11 
  

   12 
  

   13 
  

   14 
  

   15 
  

   16 
  

   17 
  

   18 
  

  

  19 
  

  

  20 
  

  

  21 
  

  

  22 
  

  

  23 
  

   24 
  

  

  25 
  

  

  II 
  

   III 
  

  

  IV 
  

  

  V 
  

   YI 
  

   I 
  

  

  II 
  

   IV 
  

  

  v 
  

  

  I 
  

  

  II 
  

  

  III 
  

  

  Bunning 
  up 
  and 
  down 
  stairs- 
  

   10 
  times 
  in 
  129 
  sees 
  

  

  10 
  

   10 
  

   10 
  

   10 
  

   10 
  

  

  10 
  

   10 
  

   10 
  

   10 
  

   10 
  

   10 
  

   10 
  

   10 
  

  

  123 
  

   118 
  

   152 
  

   132 
  

   118 
  

   90 
  

   125 
  

  

  118 
  

   130 
  

   150 
  

   155 
  

   142 
  

   135 
  

   130 
  

   117 
  

   110 
  

  

  Walking 
  36 
  mins 
  

  

  „ 
  37 
  „ 
  

  

  Second 
  walk 
  in 
  33 
  mins. 
  

  

  Walking 
  30 
  mins 
  

  

  Second 
  walk 
  in 
  32 
  mins. 
  

  

  Walking 
  34 
  mins 
  

  

  Second 
  walk 
  in 
  36 
  mins. 
  

  

  Walking 
  38 
  mins 
  

  

  Second 
  walk 
  in 
  38 
  mins. 
  

   Climbing 
  hill 
  (1000 
  feet) 
  

  

  Descending 
  same 
  

  

  Ditto 
  

  

  Ditto 
  

  

  109 
  

  

  152 
  

  

  5 
  mins. 
  139 
  : 
  13 
  mins. 
  115. 
  

  

  105 
  

  

  162 
  

  

  5 
  »> 
  

  

  126. 
  

  

  108 
  

  

  140 
  

  

  5 
  „ 
  

  

  125. 
  

  

  1]2 
  

  

  172 
  

  

  8 
  „ 
  

  

  122. 
  

  

  106 
  

  

  140 
  

  

  5 
  » 
  

  

  114. 
  

  

  110 
  

  

  145 
  

  

  5 
  » 
  

  

  123. 
  

  

  119 
  

  

  143 
  

  

  5 
  „ 
  

  

  122. 
  

  

  112 
  

  

  162 
  

  

  3 
  „ 
  

  

  146 
  ; 
  5 
  mins. 
  130. 
  

   8 
  mins. 
  108. 
  

  

  110 
  

  

  148 
  

  

  5 
  „ 
  

  

  126. 
  

  

  137 
  

  

  186 
  

  

  5 
  „ 
  

  

  172 
  ; 
  8 
  mins. 
  140. 
  

  

  147 
  

  

  178 
  

  

  2 
  „ 
  

  

  157 
  ; 
  5 
  mins. 
  142. 
  

  

  129 
  

  

  192 
  

  

  5 
  „ 
  

  

  128. 
  

  

  132 
  

  

  162 
  

  

  5 
  „ 
  

  

  130. 
  

  

  124 
  

  

  148 
  

  

  5 
  „ 
  

  

  130. 
  

  

  122 
  

  

  .170 
  

  

  5 
  „ 
  

  

  135 
  ; 
  10 
  mins. 
  128. 
  

  

  126 
  

  

  185 
  

  

  5 
  

  

  152. 
  

  

  141 
  

  

  176 
  

  

  5 
  „ 
  

  

  132. 
  

  

  109 
  

  

  129 
  

  

  15 
  „ 
  

  

  110; 
  45 
  mins. 
  109. 
  

  

  119 
  

  

  130 
  

  

  

  

  148 
  

  

  20 
  „ 
  

  

  118. 
  

  

  113 
  

  

  137 
  

  

  

  

  

  130 
  

  

  5 
  „ 
  

  

  112. 
  

  

  139 
  

  

  153 
  

   130 
  

  

  

  

  112 
  

  

  132 
  

  

  

  

  

  128 
  

  

  

  

  109 
  

  

  134 
  

  

  

  

  

  118 
  

  

  

  

  110 
  

  

  135 
  

  

  

  

  

  123 
  

  

  

  

  112 
  

  

  102 
  

  

  

  

  

  102 
  

  

  

  

  