ENS 304
Physiology of Exercise
(section 2)
Fred W. Kolkhorst, Ph.D.
ENS 311; 594-1924
fred.kolkhorst@sdsu.edu
office hours: MWF 9:00-11:00
http://wwwrohan.sdsu.edu/course/ens304/public_html/section2/index
.html
Exercise Physiology
 A biological study of physical
activity stresses, both acute effects
and training adaptations
 Typical ergometers used to study
exercise effects
– cycle
– treadmill
Course Prerequisites
 classified as a major in kinesiology or
nutrition
 grade of C (not C-) or better in BIOL 336
(Human Physiology) or equivalent course
 ENS 210 or equivalent course
 If WebPortal indicates that you have NOT
met these prerequisites, you MUST
provide documentation to me.
How to be Successful in
Physiology of Exercise
 Class will begin at 8:00, everyone is to be on time. If
you are late, enter the back door of the classroom so
as not to disturb others
 Cell phones are to be turned off during class
 YOU determine your success through your consistent
effort
 Take an active part in your learning; don’t hesitate to
ask questions or visit me, that’s what I’m here for
 Attempt to understand rather than memorize
 Study with classmates on a regular basis
 Sit in the front, don’t miss class
e-book available from McGraw Hill
1. Go to http://ebooks.primisonline.com
2. Click on the “McGraw-Hill e-book” icon (the big yellow
”e”).
3. Review the 5 steps listed on the screen then click
“Next”.
4. On “Step 1” Click “Social Sciences and Humanities”.
5. Select the appropriate discipline, and then select text
title. (Be sure to select correct edition.)
Powers & Howley, Exercise Physiology: Theory and Application to
Fintess and Performance, 2007.
6. Follow the screen prompts.
eInstruction Personal Response Pads
(clickers)
 We will use the CPS Personal
Response Pads (i.e., “clickers”)
 Purchase clicker from Aztec Shops
 Before you can use clicker, must
register through Blackboard
– Instructions found in Blackboard
(Tools/CPS Connection)
– Must first create an account and
register your clicker
 Register clicker for class by Tue,
Sep 4
What is a Clicker?
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Classroom Performance System
Each student has a clicker
Clickers send wireless signals
Computer has a receiver
Displays responses from class
Why Clickers?
 Questions will be posed during each class
that require your response
 Enhances student learning
 Encourages interaction
 Provides feedback
 Increase active learning
 Quizzes will be given periodically using the
clickers
 Exams will be administered with paper/pencil
Course Grading
 Four exams 40-60 points each (200
points)
 Eight unannounced quizzes 5 points each
– will throw out two lowest scores (60 points)
 Plusses and minuses will be used for
course grades
Review of Physiological Principles
atoms, molecules, and ions
substrates  products
ATP  ADP + Pi + energy
glucose  2 pyruvic acid  2 lactic acid
Review of Physiological Principles
Enzymes speed up reaction rates
ATPase
ATP <———> ADP + Pi + energy
carbonic anhydrase
H+ + HCO3- <——————> H2CO3 <——> H2O + CO2
Review of Physiological Principles
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pH
buffer
homeostasis
steady-state
Absolute and Relative Comparisons
A 100-lb woman can bench press 50 lb and a
200-lb man can bench press 75 lb. Who is
the strongest? Explain.
A. 100-lb woman
B. 200-lb man
 Absolute strength – man can lift 25 lb more than
woman
 Relative strength – woman can lift 0.5 lb / lb
body weight whereas man can lift only 0.375 lb /
lb body weight
Absolute and Relative Comparisons
Question
Would you prescribe an absolute or relative
target HR in a fitness class of 20- and 80-yr old
clients? Explain.
Interpreting Graphs
Relationship between Variables
 Independent variable – one that is
manipulated/controlled by investigator
 Dependent variable – one that is
measured to determine response from
varying independent variable
Relationship of Variables
Curvilinear
Linear
Blood
[La]
HR
Running Velocity
Running Velocity
Identify the dependent and independent variables
Interpreting Graphs
Figure 1
Figure 2