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The Ariel Computerized Exercise System (CES), developed by Dr. Gideon Ariel, a renowned authority in biomechanics, represents the state-of-the-art in technology for medical diagnostics, physical therapy and rehabilitation, sports medicine evaluation and treatment, fitness training and research. The CES system automatically monitors, controls and modifies resistance and velocity, in ´┐Żreal-time´┐Ż as the exercise is being performed. It does so safely and efficiently, constantly adjusting itself to each person´┐Żs individual capabilities and limitations, and may be used isotonically, isokinetically, and isometrically. It is uniquely interactive and the only exercise system available with so many capabilities.

The CES also records accurate measurements of movement, strength and endurance with the capacity for storage and subsequent comparison of the individual´┐Żs performance.

Rest assured that the CES is not difficult to use. It has been designed to remove much of the burden of exerciser program selection for the inexperienced user, while at the same time providing advanced training and diagnostic tools to the coach, trainer or clinician.

Regardless of your level of experience, prior knowledge of computers or data processing is not necessary. Performing a personalized training or rehabilitation program is accomplished by following simple directions on the monitor and entering proper selections provided by the menu driven system. Even the most advanced features of the CES can be mastered in a few practice sessions.

Please take some time now to familiarize yourself with this manual, and with the various components that make up the Ariel CES. This manual describes these components and the functions performed by each one. Step-by-step instructions are provided through a sample exercise session as well as descriptions of more of the advanced features of the CES.

Take your time! Experiment! Enjoy yourself! You have just entered a new dimension of human performance...  

What's new in CES 1.0

A few of the new features you will see in Ariel CES version 1.0

1.    Windows Operating System. Operation has been implemented for CES operation from the Microsoft Windows (98SE/2000) operating system.

2.    Audio Instructions. User recordable audio (*.wav) files are used for instructions.

System overview

The ARIEL CES consists of a number of components that work together to perform the functions of resistive training and rehabilitation, data measurement and display, and system control. Each of these components has been designed to perform its associated task reliably and efficiently with a minimum of set-up or adjustment required by the user. A description of each component, as well as a brief explanation of the function or use follows.


There are typically two exercise stations that make up the ARIEL CES; the Multi-Function Exerciser and the Arm/Leg Exerciser. Each of the ARIEL exercisers has been designed to train many different muscle groups. Functional flexibility has been achieved through the use of a computer controlled passive hydraulic resistance mechanism. This mechanism can apply a resistance of any desired magnitude to the bar of the exercise station. Resistance can be applied in both the ´┐Żup´┐Ż and ´┐Żdown´┐Ż directions over the full range of the bar motion. This design permits many different exercises to be performed on each station, and adapts to subjects of differing physical size and strength levels with no user adjustment or set-up of the resistance mechanism.

There are a number of different exercises that are commonly performed on the Multi-Function Exerciser. Notice that the Bench Press/Pull, the Sitting Press/Pull, and the Curl/Triceps are bi-directional exercises - that is, resistance can be applied on the down stroke as well as the up stroke so that more than one muscle group can be trained by a single exercise. Numerous exercises can also be performed on the Arm/Leg Exerciser. These are also bi-directional.

The programmable hydraulic resistance mechanism offers certain advantages over traditional weight training equipment. Weights have inertia. In other words, it takes more effort to get them moving than to keep them moving. In weight training, subjects often use a large initial effort to start the weights moving, and then ´┐Żcoast´┐Ż to the end of the stroke. The ARIEL CES has very low inertia. The hydraulic resistance requires continuous muscular effort throughout the range of motion, resulting in more effective training. Also, the ARIEL exerciser offers exceptional safety and quietness of operation. Since resistance is achieved through passive hydraulics, the bar will immediately stop when released. There are no weight stacks to fall back to their resting position with a resulting rapid and dangerous movement of the bar. When training in a rehabilitation environment, a subject may immediately cease exercising if pain occurs without having to lower heavy weights. The hydraulic mechanism is inherently quiet as well. There is no ´┐Żclang´┐Ż as when weights hit the stack at the end of each repetition.


The System Control Computer contains the ´┐Żbrains´┐Ż of the ARIEL CES. It also contains a CD-ROM and diskette drive for program and data storage, and specialized electronics that allow it to monitor and control the functions of the exercise station. The computer connects to the exercise station with an intermediate junction box. The junction box provides power to the stepper motor and also allows for simultaneous data collection from analog data sources such as EMG electrodes. The computer has a switchable power supply that can be set for either 120 or 240-volt power.

Although the computer console may at first appear complex, it is actually quite simple to operate. A user with a pre-programmed exercise sequence merely has to select the desired program and proceed with the exercise sequence. For the balance of the exercise session the computer will automatically select and set up each exercise and inform the user what function to perform next. When the exercise session has been completed, the user simply logs out until the next scheduled exercise session.

For experienced users, coaches, clinicians, and health club personnel, many advanced features of the ARIEL CES are available through the system computer. These include programming individual exercise sequences, calibrating the exercise station, performing system utilities, and running diagnostics in the event of a malfunction. These powerful features are selected and run through a series of ´┐Żmenus´┐Ż that are displayed on the computer monitor. This menu approach allows simple and rapid access to all of the capabilities of the ARIEL CES without requiring a knowledge of computers or data processing equipment. Subsequent sections will discuss these various advanced functions in detail.

A typical CES computer system consists of 500 MHz computer, CD-ROM (or optional CD-RW), 1.44 MB floppy disk drive, 20 GB hard disk drive, 64 MB RAM, an AGP graphic card and color monitor. Microsoft Windows is used for the operating system.


The computer monitor is a standard high resolution color monitor that is used to display information from the system computer. During the exercise, it continuously reports the user performance both graphically and numerically. The monitor also displays the user´┐Żs cumulative performance at the end of each exercise, and optionally compares it to previous performance levels. The monitor is normally placed next to the system computer, though it may be relocated in any manner desired. Most current monitors use ´┐Żauto-sensing´┐Ż power supplies and support voltages from 100 to 240 volt AC power.


The color graphic printer is an option to the basic ARIEL CES. The printer is used to produce copies of exercise results and reports. Any Microsoft Windows compatible printer can be used with the ARIEL CES.

See also

ACES FAQACES - Frequently asked questions
Exercise ProgramACES - Setting up an exercise program
Exercise ResultsACES - Exercise results
InstallationACES - Installation and calibration
IntroductionACES - Introduction
Sample SessionACES - A sample exercise session
SoftwareACES - How to run the software
TechnicalACES - Technical description: limits and resolution of measurement

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This page was last modified on 12/07/2008 at 22:47 PST. Copyright ´┐Ż 1994 - 2002, all rights reserved, Ariel Dynamics Inc. Please send your comments or feedback to or proceed to our feedback form. This page has been accessed many times since Dec 12, 2002. Our privacy policy is here.