Exercise Physiology (EXS 397)

SUNY Cortland

LAB # 10

 

                                                                                                                       

Measurement of Body Temperature During Exercise

 

Purpose – This laboratory experience is designed to expose the student to responses of core and skin temperature to an incremental cycling exercise and exercise with plastic covering.

 

Methods – The following steps will be used to measure core and skin temperature during exercise. This lab experience will require one subject and a recorder.

1.      Materials needed:

a.      Cycle ergometer

b.      Ear thermometer

c.      Tele-thermometer and associated cables

d.      Stopwatch or Clock for timing

e.      Plastic tape

f.       Plastic sheet or bags

 

2.      Preparation of Subject:

a.      Weigh subject with amount of clothing that they will be riding the cycle with

b.      Situate subject properly on the cycle ergometer

c.      Attach temp. sensors to appropriate sites:

                                                                             i.      Over biceps muscle on right arm

                                                                              ii.      Over biceps muscle on left arm

d.      Wrap plastic covering over left arm and sensor

e.      Place a thermometer in ear for core temp.

 

3.      Rest and Exercise measurements

a.      Record both skin and core temp. measurements at rest:

                                                                             i.      For skin temp. readings, record right and left arm temps

                                                                              ii.      For core temp. reading, record ear temp

b.      Exercise subject at:

               Stage 1 = 1.5 kp and pedal at 50 rpm’s for 3 min

               Stage 2 = 2.0 kp and pedal at 50 rpm’s for 3 min

               Stage 3 = 2.5 kp and pedal at 50 rpm’s for 3 min

               Stage 4 = 3.0 kp and pedal at 50 rpm’s for 3 min

               Stage 5 = 3.5 kp and pedal at 50 rpm’s for 3 min

c.      Record skin and core temps during the last 15 sec of each stage

d.      Once all skin and core temps are recorded, subject may cool down for 2-3 min. at 0.5 kp

e.      Obtain a body weight on the subject.

 

Results – Utilizing the equations listed below, calculate the following for subject : skin temp at last stage for both right and left arms, total body temp, body heat storage (kcal), sweat loss, evaporative water loss and evaporative heat loss.

 

1. Record skin temperatures for both arms at rest and last exercise stage:

 

a.)   Resting Skin temp for right arm = __________ ^oC

b.) Resting Skin temp for left arm = __________ ^oC

c.) Last stage Skin temp for right arm = __________^oC

d.) Last stage Skin temp for left arm = __________^oC

 

2. Calculate total body temperature for both arms + core using the following equation for

rest and last exercise stage:

 

               Total body temp ^oC = (0.33 Tskin) + (0.67 Tcore)

 

               a. Resting Total body temp using right arm + core = ________^oC

               b. Resting Total body temp using left arm + core =    ________^oC

               c. Last stage Total body temp using right arm + core = ________^oC

               d. Last stage Total body temp using left arm + core =             ________^oC

                             

3. Calculate body heat storage (Kcal) = Body wt (kg) x (.83 total body temp) for rest

and last exercise stage:

 

               a. Resting Kcals (based upon right arm) = ________

               b. Resting Kcals (based upon left arm) = ________

               c. Last stage Kcals (based upon right arm) = ________

               d. Last stage Kcals (based upon left arm) = ________

 

4. Calculate sweat loss (ml) = [(prewt – post wt) x 1000] – (0.11 x Last stage Kcals) –

(0.12 x Last stage Kcals)

 

a.      Last stage Sweat loss (based upon right arm) = __________ mls of water

b.      Last stage Sweat loss (based upon left arm) = __________ mls of water

 

5. Calculate evaporative water loss (ml) = [(prewt – post wt) x 1000] – (0.11 x Last stage

Kcal)

               a. Last stage Evaporated water loss (based upon right arm) = __________ mls of water

               b. Last stage Evaporated water loss (based upon left arm) = __________ mls of water

 

6. Calculate evaporative heat loss (Kcal) = evaporative water loss (in liters) x 580

 

a.      Last stage Evaporative heat loss (based upon right arm) = __________ Kcals

b.      Last stage Evaporative heat loss (based upon left arm) = __________ Kcals

 

 

DISCUSSION

 

1. Describe the ways by which the body loses heat at rest?

 

 

 

 

2. Explain the principle means by which we lose heat during exercise?

 

 

 

 

3. What happens to the difference between core temp and skin temperature during exercise and why?

 

 

 

 

4. What did you observe between the noncovered (right) upper arm skin temp and the covered (left) upper arm skin temp during exercise relative to: i.e. what change or difference was observed (one higher than another?
1. exercise intensity _________________________________
2. from calculations of:

1.)   total body temp _____________________________________

2.)   body heat storage _____________________________________

3.)   sweat loss ___________________________________________

4.)   evaporative water loss _________________________________

5.)   evaporative heat loss ___________________________________

 

5. What effect would wearing a rubberized suit have on your cardiovascular system?

 

 

 

 

Recording Sheet

 

                                                                                                                                       Name ____________

                                                                                                                                       Date ____________

Resting Temperatures:

 

               Core Temperature = ___________^oC

               Right arm Skin Temperature __________ ^oC

               Left arm Skin Temperature _________ ^oC

 

Body Weight (at rest) ______________ kg.

Body Weight (at completion of exercise) _____________ kg.

 

Exercise Stage    Core Temp Skin Temp (Rt Arm) Skin Temp (Left Arm)

1
2
3
4
5