﻿Exercise 
  and 
  Humid 
  Heat 
  upon 
  Pulse 
  Rate, 
  etc. 
  117 
  

  

  The 
  observations 
  upon 
  the 
  effect 
  of 
  humid 
  heat 
  alone 
  upon 
  the 
  blood 
  

   pressure 
  were 
  only 
  carried 
  out 
  on 
  two 
  subjects, 
  and 
  gave 
  inconsistent 
  results. 
  

   In 
  some 
  instances 
  the 
  blood 
  pressure 
  of 
  one 
  of 
  the 
  subjects 
  rose, 
  whereas 
  it 
  

   fell 
  to 
  a 
  slight 
  extent 
  with 
  the 
  other. 
  Hill 
  and 
  Flack 
  (1909) 
  on 
  the 
  other 
  

   hand, 
  observed 
  a 
  constant 
  and 
  considerable 
  fall 
  in 
  ^the 
  blood 
  pressure 
  after 
  a 
  

   stay 
  of 
  fifteen 
  minutes 
  in 
  a 
  hot 
  bath 
  of 
  100° 
  to 
  112° 
  F. 
  

  

  Body 
  Temperature. 
  — 
  Previous 
  observers 
  have 
  proved 
  that 
  the 
  rectal 
  

   temperature 
  may 
  rise 
  to 
  as 
  much 
  as 
  102° 
  F. 
  in 
  perfectly 
  healthy 
  individuals 
  

   as 
  the 
  result 
  of 
  moderate 
  exercise 
  in 
  a 
  -temperate 
  climate, 
  and 
  Sill 
  and 
  Flack 
  

   have 
  recorded 
  even 
  much 
  higher 
  temperatures 
  in 
  athletes. 
  In 
  one 
  individual, 
  

   for 
  example, 
  a 
  temperature 
  of 
  105° 
  was 
  recorded 
  after 
  a 
  foot-race 
  over 
  a 
  

   course 
  of 
  three 
  miles, 
  and 
  these 
  authors 
  drew 
  attention 
  to 
  the 
  fact 
  that 
  the 
  

   temperature 
  rose 
  with 
  the 
  duration 
  of 
  the 
  effort. 
  

  

  In 
  the 
  present 
  experiments 
  exertion 
  of 
  short 
  duration 
  did 
  not 
  produce 
  any 
  

   rise 
  of 
  any 
  consecpaence 
  ; 
  0'3°-0 
  - 
  8° 
  F. 
  was 
  the 
  usual 
  elevation, 
  and 
  only 
  on 
  

   one 
  occasion 
  (subject 
  VI) 
  a 
  rise 
  of 
  2° 
  was 
  found. 
  

  

  Table 
  III. 
  

  

  No. 
  

  

  Subject. 
  

  

  Mature 
  of 
  exercise. 
  

  

  Air 
  temperature. 
  

  

  Eectal 
  temperature. 
  

  

  Dry 
  bulb. 
  

  

  Wet 
  bulb. 
  

  

  Before 
  

   exercise. 
  

  

  After 
  

   exercise. 
  

  

  1 
  

  

  I 
  

  

  _ 
  

  

  86 
  -6 
  

  

  72 
  -2 
  

  

  99 
  -6 
  

  

  100-9 
  

  

  

  

  37 
  „ 
  

  

  87 
  -3 
  

  

  76 
  -0 
  

  

  99-4 
  

  

  ioi 
  -a 
  

  

  2 
  

  

  { 
  

  

  

  

  

  

  

  102 
  

  

  3 
  

  

  

  

  88-1 
  

  

  79-8 
  

  

  99 
  7 
  

  

  102-7 
  

  

  

  

  

  

  

  

  103 
  

  

  

  

  

  85 
  -0 
  

  

  76 
  -2 
  

  

  99 
  -8 
  

  

  101 
  8 
  

  

  4 
  

  

  

  2nd 
  time 
  in 
  36 
  mins 
  

  

  

  

  

  102-0 
  

  

  

  

  

  84-2 
  

  

  74 
  3 
  

  

  99 
  -9 
  

  

  101 
  3 
  

  

  5 
  

  

  

  

  

  

  

  101 
  6 
  

  

  6 
  

  

  

  Walking 
  2\ 
  hours 
  

  

  80-1 
  

  

  78 
  -2 
  

  

  100 
  -3 
  

  

  101 
  9 
  

  

  7 
  

  

  

  „ 
  H 
  » 
  

  

  85-2 
  

  

  75 
  -3 
  

  

  99 
  -8 
  

  

  101 
  4 
  

  

  8 
  

  

  

  2 
  „ 
  

  

  86 
  4 
  

  

  81 
  -0 
  

  

  100 
  3 
  

  

  103 
  1 
  

  

  9 
  

  

  II 
  

  

  „ 
  2£ 
  „ 
  

  

  80-1 
  

  

  78 
  -2 
  

  

  99 
  -8 
  

  

  101 
  "2 
  

  

  10 
  

  

  

  „ 
  H 
  „ 
  

  

  85 
  -2 
  

  

  75 
  3 
  

  

  99-5 
  

  

  100 
  -6 
  

  

  11 
  

  

  

  2 
  „ 
  

  

  86 
  4 
  

  

  81 
  

  

  99 
  "5 
  

  

  101 
  -4 
  

  

  12 
  

  

  III 
  

  

  „ 
  2 
  „ 
  

  

  86 
  -4 
  

  

  81 
  

  

  98 
  -8 
  

  

  101 
  -3 
  

  

  13 
  

  

  VII 
  

  

  H 
  , 
  

  

  80-1 
  

  

  78 
  -2 
  

  

  100 
  

  

  100 
  -9 
  

  

  14 
  

  

  

  3* 
  „ 
  

  

  85 
  -2 
  

  

  75 
  3 
  

  

  99 
  -6 
  

  

  101 
  -o 
  

  

  15 
  

  

  I 
  

  

  Climbing 
  hill 
  (1000 
  feet) 
  

  

  86 
  -2 
  

  

  78 
  -1 
  

  

  99 
  6 
  

  

  102 
  

  

  16 
  

  

  II 
  

  

  86 
  -2 
  

  

  78-1 
  

  

  99 
  -7 
  

  

  102 
  -0 
  

  

  17 
  

  

  

  

  85 
  -0 
  

  

  75 
  "5 
  

  

  99 
  -5 
  

  

  101 
  -4 
  

  

  18 
  

  

  III 
  

  

  

  86-2 
  

  

  78-1 
  

  

  99 
  -2 
  

  

  103 
  -3 
  

  

  Prolonged 
  and 
  less 
  vigorous 
  exertion 
  — 
  such 
  as 
  walking 
  or 
  hill-climbing 
  

   during 
  the 
  hot 
  hours 
  of 
  the 
  day 
  — 
  caused 
  much 
  higher 
  rectal 
  temperatures, 
  

   and 
  the 
  increase 
  was 
  more 
  marked 
  during 
  the 
  first 
  part 
  of 
  the 
  exercise 
  than 
  

  

  