Friday, August 5, 2016

TI-84 Plus CE: Calories Burned While Walking

TI-84 Plus CE: Calories Burned While Walking

Introduction

Caution:  These programs give an estimate on the number of total calories burned.  Other factors such as the intensity of the walk may be needed to taken into consideration.  This blog entry should not be considered professional medical advice.

There are two programs that estimate the number of calories burned during a single walking session.  WALKCAL uses your stride and the number of steps as inputs.  If your stride isn’t known, an average stride is estimated based on your height.  WALKDIST uses distance traveled and time it took to travel such distance as input.  WALKDIST is the more simple program of the two.

All units are entered in U.S. units.  Since the formulas use SI units, some conversions are necessary.  The programs will perform all necessary conversions upon execution.

1 ft = 30.48 cm
1 mi = 5,280 ft
1 m/min = 26.82 mph
1 lb = 0.453592 kg
3.5 V02 = 1 MET

WALKCAL

WALKCAL:  Calories burned by inputting your stride (in feet), weight (in pounds), number of steps walked, and the time of the walk (in hours).

TI-84 Plus Program WALKCAL
Lbl 1
Disp "HEIGHT: (FT/IN)"
Input "FEET:",F
Input "INCHES:",I
F+I/12→H
Lbl 2
0→G
Goto 4
Lbl 3
1→G
Lbl 4
iPart(30.48H*(.413+.002G))/30.48→X
Disp "STRIDE (FT):",X
Goto 5
Lbl 0
Input "STRIDE (FT):",X
Lbl 5
Input "NO. STEPS:",S
SX/5280→D
Input "TIME (HRS):",T
D/T→V
3.5+(26.82V*.1+26.82V*E*1.8)→Y
Input "WEIGHT (LB):",W
Y/3.5*W*.453592→B
Disp "DIST (MI):",D
Disp "AVG SPEED:",V
Disp "CALORIES BURNED:",BT

Example:
5’3” female (stride unknown), walks 7500 steps in 1 hour.  She weighs 108 pounds.  Grade averages to be about 1% (0.01).
Results:
DIST (MI):  3.075787402
AVG SPEED:  3.075787402
CALORIES BURNED:  185.232189

WALKDIST

WALKDIST:  Calories burned by inputting your weight (in pounds), the distance walked (in miles), the time of walk (in hours).

TI-84 Plus Program WALKDIST
Input "DIST (MI):",D
Input "TIME (HRS):",T
D/T→V
3.5+(26.82V*.1+26.82V*E*1.8)→Y
Input "WEIGHT (LB):",W
Y/3.5*W*.453592→B
Disp "AVG SPEED:",V
Disp "CALORIES BURNED:",BT

Example:
Walk 5.2 miles in 1.8 hours, and the person weighs 150 pounds.  Use average grade of 1% (0.01).
Results:
AVG SPEED: 2.888888889
CALORIES BURNED:  442.3834566

Sources:

American College of Sports Medicine.  “Metabolic Equations for Gross V02 in Metric Units” http://certification.acsm.org/metabolic-calcs   2015.   Retrieved July 24, 2016.

“Accurate Formulas To Determine Calories Burned Jogging”  http://community.myfitnesspal.com/en/discussion/134478/accruate-formula-to-determine-calories-burned-jogging   November 14, 2010.   Retrieved July 24, 2016

Hope you find this useful!  Have a great day,

Eddie

This blog is property of Edward Shore, 2016.