The exer station concept
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The EXER-STATION “Concept”. Group members: Tarafa M. Al-Awaj Bichar Myrtil Project advisor: Dr. Marshall Summar. Concept?. Project 100% operational… Project meets 100% of criteria… Project not yet ready for market production. Why did this happen? 1 st Project. Lack of resources: Time

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The EXER-STATION “Concept”

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The exer station concept

TheEXER-STATION“Concept”

Group members:

Tarafa M. Al-Awaj

Bichar Myrtil

Project advisor:

Dr. Marshall Summar


Concept

Concept?

  • Project 100% operational…

  • Project meets 100% of criteria…

  • Project not yet ready for market production.

    Why did this happen?

  • 1st Project.

  • Lack of resources:

    • Time

    • Money

  • More detailed explanation will be given later...


Dr marshall summar

Dr. Marshall Summar

  • Associate Professor of Pediatrics at Vanderbilt.

  • Associate Professor of Molecular Physiology & Biophysics at Vanderbilt.

  • Met in November of 2003.

  • Interested in helping children (ages 8-18) with the genetic disease PKU.

  • We gladly joined him on this mission.


Phenylketonuria pku

Phenylketonuria (PKU)

  • Genetic disorder characterized by he absence or deficiency of an enzyme that is responsible for processing the essential amino acid phenylalanine.

  • Abnormal phenylalanine accumulation in the blood is toxic to brain tissue.


Phenylketonuria pku1

Phenylketonuria (PKU)

  • It is estimated that PKU occurs in one in 20,000 newborns in the United States.

  • Equally frequent in males and females.

  • ≈ 27,200 individuals in the USA.


Pku effects

PKU Effects

Without treatment, most infants with PKU develop:

  • Mental retardation (IQ < 80), and additional neurological symptoms…

    • which lead to introverted children.

  • A low metabolism…

    • which leads to overweight, even obese children.


Pku children

PKU Children

  • Spend almost all and any time available playing video games.

  • Get little or no exercise, day in day out.

Compound problems and lead to deterioration of their general health and quality of life.


Other pertinent factors

Other Pertinent Factors

A large portion of PKU children share these factors in common:

  • Some physical limitations.

  • Lower socio-economic background (limited financial resources).

  • Parents low in motivation.

  • Other limited resources (e.g. education).


The bigger issue

The Bigger Issue

"We have noticed that children in America are tending more toward obesity [& less general fitness] than in decades past; Part of it is due to sedentary lifestyles that kids are getting into. Rather than run in the woods, they've got Game Boy, Nintendo and television."

- Discovery_Channel.com/Health

Dec 2003


Alternate solutions

Alternate Solutions

  • DRUG ADMINSTRATION (e.g., Amphetamines)

    • Adverse Psychological Effect/Damage.

    • Possibly Addictive (dependency).

  • PERSONAL TRAINER/THERAPIST

    • Expensive (cost factor).

    • Lack of Independent Motivation.


Ideal solution

Ideal Solution

From the IWB ideation process:

Find an alternative way to obtain (exercise) that offers the following: eliminates, reduces, or prevents (weak muscles), (obesity) and (health problems), and is not influenced by (Addiction to video games) and (PKU).


Solution

Solution

  • Motivate to independently exercise.

  • Incorporate aerobic physical activity into video game play.

  • Substitute some “finger-activated” commands with “leg-activated” ones.

  • Allow patient to remain seated.

  • Aid in improving patient health and morale.

    _______________________________________

EXER-STATION


The exer station concept

Aims

1 hour of Exer-Station =

20 minute Brisk Walk

OR

4 minute Sprint

OR

Approximately 86 Calories!


Design of exer station

Design of EXER-STATION

Consists of 3 main components:

  • Device:

    • Wheel

    • Trainer:

      • Structure

      • Resistance

    • Generator

  • Circuit

  • Controller


  • The exer station concept

    Controller

    • Up/Down commands of the Left analog stick will be replaced by pedal motion.

    • All other commands will remain intact and function through hand controller.

    • Each analog stick controlled by two 10K pots.

    • 3 pins of pot are: i) Ground, ii) Signal, iii) 3.44V source.

    • At Center, signal = 1.72V, (range 1.35V - 2.05V)

    • At max Up, signal = 3.15V

    • At max Down, signal = .5V


    Device wheel

    Device: Wheel

    • United 24-inch Adult Trainer, Item # UNU24AT-27.

    • diameter = 24”

    • crank arm length = 6”


    The exer station concept

    Device: Trainer & Resistance

    • Volare Mag Trainer w/Elastogel and Remote.

    • Magnetic resistance unit with 5 different levels of adjustment.

    • Resistance shaft diameter = 1.25”

    • w = 27 lbs

    • d1 = 14”

    • d2 = 17”

    • h = 30”

    • l1 = 2”

    • l2 = 8”

    • h = 30”

    • c = 17.5”


    The exer station concept

    Device: DC Generator

    • RadioShack hobby motor, model# 273-255.

    • 12V DC motor.

    • 1.3A @ 11,500 rpm.

    • Produces 350mV per 100 rpm.

    • Coupled with shaft of resistance.

    Output from generator will be smoothed, summed, and scaled via the circuit to produce a DC current from 0.5V to 3.15V for maximum down/up motion of left analog stick, respectively.


    The exer station concept

    Circuit


    The exer station concept

    The final setup will look something like this.


    Additional parameters

    Additional Parameters

    • Pedaling speed Range: 40rpm – 120rpm

      • Below 40:- Strains joints

      • Above 120:- Efficiency falls off

    • Ratio of wheel to resistance shaft rpm :

      π * dwheel : π * drs

      24 : 1.25

      20 : 1

    • Actual ratio 18-14:1 (due to frictional slips).


    Results

    Results

    • Kids play ≈ 6 hours/day

    • Use ≈ 100 Calories/hour

    • Expend ≈ 600 Calories/day!!!


    Game play

    Game Play

    • Design and Tested To Work Best w/ Motion Games such as 007 Agent under fire.

    • Or Simple Maneuver such as Pac-Man


    Time chart

    TIME CHART


    Work remaining

    Work Remaining

    • Safety Issues

    • Aesthetics

    • Perf-boarding

    • Hardwiring

    • Playing, playing, and more playing.


    Budget

    BUDGET

    • $400 Initial Budget (from Dr. Summar)

      • Playstation II Console ($200)

      • Multiple Controllers ($75)

      • Three Games ($150)

    • Additional $350 Requested (from Dr. King’s Grant)

      • Leg Activated Elements

        • Unicycle ($125)

        • Mag. Trainer ($150)

        • DC Generator ($25)

        • Wires

        • LEDs

        • Chips

        • Circuit Board

    • Decorative Design/ Aesthetics

    • Miscellaneous


    Concept to market

    Concept to Market

    Issues to be addressed first:

    • Size

    • Adjustability

    • Power source

    • Price


    Market potential

    MARKET POTENTIAL

    • Ages 8+

    • Hospital Patients

    • Obese Individuals

    • Individuals concerned about fitness

    • General Video Game Audience


    The exer station concept

    RESOURCES

    ADVISORS

    • Paul H. King, PhD., P.E.:

      -Associate Professor of Biomedical Engineering at Vanderbilt.

      -Associate Professor of Mechanical Engineering at Vanderbilt.

      -Associate Professor of Anesthesiology at Vanderbilt.

      -Instructor of the senior Biomedical Engineering design course at Vanderbilt.

    • Marshall Summar, M.D.:

      -Associate Professor of Pediatrics at Vanderbilt.

      -Associate Professor of Molecular Physiology & Biophysics at Vanderbilt.

    VANDERBILT UNIVERSITY

    -lab space

    -machine shop

    -research facilities

    -software

    -help purchase necessary tools/equipment

    SECOND BASE

    -back-up location when primary lab not available


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