﻿Exercise 
  and 
  Humid 
  Heat 
  upon 
  Pulse 
  Rate, 
  etc. 
  11^ 
  

  

  In 
  this 
  connection 
  it 
  has 
  been 
  noticed 
  by 
  Boycott 
  and 
  Haldane 
  (1908) 
  that 
  

   outer 
  temperatures 
  influence 
  the 
  carbon 
  dioxide 
  in 
  the 
  alveolar 
  air, 
  and 
  that 
  

   there 
  existed 
  in 
  fact 
  a 
  seasonal 
  variation, 
  higher 
  percentages 
  being 
  found 
  in 
  

   cold 
  and 
  lower 
  in 
  warm 
  weather. 
  They 
  do 
  not 
  believe, 
  however, 
  that 
  these 
  

   changes 
  are 
  caused 
  by 
  variations 
  in 
  the 
  body 
  temperature, 
  but 
  are 
  solely 
  due 
  

   to 
  the 
  effect 
  of 
  contact 
  of 
  the 
  face 
  and 
  hands 
  with 
  cold 
  or 
  warm 
  air. 
  Lower 
  

   averages 
  than 
  the 
  European 
  figures 
  were 
  obtained 
  by 
  Chapman 
  and 
  

   Wardlaw 
  (1916) 
  working 
  in 
  Sydney, 
  and 
  Chapman 
  has 
  stated 
  that 
  he 
  has 
  

   never 
  obtained 
  a 
  maximum 
  higher 
  than 
  6 
  per 
  cent., 
  which 
  in 
  his 
  opinion 
  is 
  

   due 
  to 
  the 
  higher 
  average 
  outer 
  temperatures 
  in 
  Sydney. 
  

  

  Table 
  VI 
  contains 
  the 
  details 
  of 
  analyses 
  of 
  alveolar 
  air 
  after 
  various 
  forms 
  

   of 
  exercise. 
  The 
  percentage 
  of 
  carbon 
  dioxide 
  in 
  general 
  was 
  greatly 
  

   increased. 
  After 
  prolonged 
  exercise 
  the 
  increase 
  was 
  much 
  less 
  marked 
  than 
  

   after 
  vigorous 
  exercise, 
  and 
  in 
  experiments 
  where 
  an 
  analysis 
  was 
  made 
  

   halfway 
  through 
  the 
  experiment 
  the 
  increase 
  was 
  more 
  marked 
  in 
  the 
  first 
  

   than 
  in 
  the 
  second 
  half. 
  In 
  several 
  experiments 
  the 
  analysis 
  after 
  exercise 
  

   showed 
  an 
  actual 
  decrease 
  when 
  compared 
  with 
  the 
  figure 
  at 
  rest, 
  which 
  

   decrease 
  may 
  be 
  attributed, 
  as 
  previously 
  explained 
  by 
  Cook 
  and 
  Pembrey 
  

  

  Table 
  VI. 
  

  

  

  

  

  CO; 
  per 
  cent, 
  in 
  alveolar 
  air. 
  

  

  No. 
  

  

  Subject. 
  

  

  Nature 
  of 
  exercise. 
  

  

  

  

  Before. 
  

  

  After. 
  

  

  1 
  

  

  I. 
  

  

  Short 
  vigorous 
  121 
  sees 
  

  

  4 
  56 
  

  

  7 
  -16 
  

  

  2 
  

  

  

  „ 
  125 
  „ 
  

  

  4 
  39 
  

  

  7 
  -28 
  

  

  3 
  

  

  

  127 
  „ 
  

  

  4-86 
  

  

  6 
  -93 
  

  

  4 
  

  

  if. 
  

  

  „ 
  133 
  „ 
  

  

  4 
  82 
  

  

  6 
  03 
  

  

  5 
  

  

  •; 
  gi* 
  138 
  „ 
  

  

  5-02 
  

  

  5 
  63 
  

  

  6 
  

  

  

  „ 
  133 
  „ 
  

  

  4-83 
  

  

  5 
  -43 
  

  

  7 
  

  

  in. 
  

  

  „ 
  105 
  „ 
  

  

  4-62 
  

  

  5 
  33 
  

  

  8 
  

  

  „ 
  120 
  „ 
  

  

  4 
  -60 
  

  

  5 
  40 
  

  

  9 
  

  

  

  „ 
  141 
  „ 
  

  

  4-82 
  

  

  6 
  15 
  

  

  10 
  

  

  IV. 
  ' 
  

  

  „- 
  151 
  „ 
  

  

  5 
  -12 
  

  

  7 
  -12 
  

  

  11 
  

  

  

  „ 
  149 
  „ 
  

  

  5 
  -01 
  

  

  6-96 
  

  

  12 
  

  

  v. 
  

  

  „ 
  148 
  „ 
  

  

  4-48 
  

  

  8-32 
  

  

  13 
  

  

  

  „ 
  135 
  „ 
  

  

  5 
  53 
  

  

  8-16 
  

  

  14 
  

  

  VI. 
  

  

  „ 
  117 
  „ 
  

  

  5 
  "25 
  

  

  9-05 
  

  

  15 
  

   16 
  

  

  i. 
  

  

  V 
  diking 
  36 
  rnins 
  

  

  4-66 
  

  

  5 
  38 
  

  

  ,. 
  37 
  „ 
  

  

  4-82 
  

  

  5 
  -27 
  

  

  { 
  

  

  

  

  5 
  "44 
  

  

  17 
  

   18 
  

  

  

  

  4-40 
  

  

  4-15 
  

  

  - 
  { 
  

  

  Walking 
  30 
  rnins 
  

  

  5-03 
  

  

  4-26 
  

  

  

  

  4 
  -65 
  

  

  19 
  

  

  

  

  5 
  -01 
  

  

  4-08 
  

  

  20 
  

   21 
  

  

  in. 
  

  

  

  5-0 
  

  

  3 
  50 
  

  

  { 
  

  

  

  5-86 
  

  

  6 
  "58 
  

  

  

  

  5 
  95 
  

  

  22 
  

  

  - 
  { 
  

  

  

  5-23 
  

  

  6-52 
  

  

  

  

  6-62 
  

  

  

  

  

  

  

  