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For two years work has been in vrogress at Stanford to deter-
mine the time required for an individual's pulse and pulse pressure to
return to the resting state after the completion of a specified exercise.
It is an established fact as shown by the work of Bainbridge in his book
and the accompanying bibliography vn the Physiology of Muscular Activity
that there is a definite relationship between the strenuousness of the
activity and the time required for the pulse and pulse pressure to re-
turn to its ele | state. With this statement to suffice as authority
for the »rocedure in this paver, the following rather interesting dis-
covery was stunbled onto.

Fatigue tests were being run on basketball players. As a part
of this program their pulse and pulse pressure during rest prior to a
practice game were recorded, and then after the game, and while the
player was resting under the same condition as before the game, readings
of pulse and vulse pressure were taken at regular five minute intervals
until his pulse and pulse pressure returned to its normal resting state
as recorded before the game was played.

Two basketball courts are available at Stanford; the regular
basketball pavilion and a court in the gymnasiun. Due to students' ac-
tivities which were scheduled for the ovavilion it became necessary to
move some of the tests to the gymnasium court.

AS a result a wide discrepancy in recovery times for games
played in the gym from the games in the pavilion was observed. At first
it was thought that this variation was due to the difference in reaction
of an individual from one test to another, so several were repeated .
Always the variation was in the same direction and consistent for the
same individual.

A considerably greater time was reauired for recovery from
the games played in the gym than for games played in the pavilion. The
amount was from 5 to 10 minutes for one individual, which is insignifi-
cant, to 80 minutes for another, which is quite marked. The following
Table shows the results for eleven tests, The figures indicate the time
requirec for the recovery of the pulse to normal resting state after a
regulation game of basketball. 4s is noted, eleven of the tests were
for games played in the pavilion,and eleven for games played in the gym.

Tine of Pulse Recovery to Resting State after
Basketbal] Games en Two Different Tynes of Floors

 

 

 

 

 

 

Subject | Minutes to recover Minutes to recover Differences in
after game in gym | after game in navilion recovery time |
7 80 75 5
2 80 55 25
3 110 100 10
4 80 35 45
es 180 50 80
6 100 80 20
7 110 80 30
8 140 90 50
9 120 90 30
10 90 40 50
Ly 100 70 50