U.S. patent application number 13/559505 was filed with the patent office on 2013-05-16 for cadence detection system and cadence sensor therefor.
This patent application is currently assigned to RACER-MATE, INC.. The applicant listed for this patent is Wilfried Baatz. Invention is credited to Wilfried Baatz.
Application Number | 20130123070 13/559505 |
Document ID | / |
Family ID | 48281172 |
Filed Date | 2013-05-16 |
United States Patent
Application |
20130123070 |
Kind Code |
A1 |
Baatz; Wilfried |
May 16, 2013 |
CADENCE DETECTION SYSTEM AND CADENCE SENSOR THEREFOR
Abstract
A cadence detection system may include a cadence sensor and an
exercise device, such as a stationary bike, an indoor cycle
trainer, a bicycle trainer, a rowing machine, a stair stepping
machine, or the like. In operation, the cadence sensor detects
movement of at least one component of the drive train of the
exercise device during operation thereof, which in turn, may be
utilized for calculating the cadence of the exercise device.
Inventors: |
Baatz; Wilfried; (Seattle,
WA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Baatz; Wilfried |
Seattle |
WA |
US |
|
|
Assignee: |
RACER-MATE, INC.
Seattle
WA
|
Family ID: |
48281172 |
Appl. No.: |
13/559505 |
Filed: |
July 26, 2012 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
61512858 |
Jul 28, 2011 |
|
|
|
Current U.S.
Class: |
482/8 |
Current CPC
Class: |
A63B 22/0605 20130101;
A63B 22/0012 20130101; A63B 2069/165 20130101; A63B 21/225
20130101; A63B 69/0057 20130101; A63B 69/16 20130101; A63B 2069/168
20130101; A63B 21/0051 20130101; A63B 21/4034 20151001; A63B 22/203
20130101; A63B 21/0088 20130101; A63B 2220/17 20130101; A63B
71/0622 20130101; A63B 2220/805 20130101; A63B 21/008 20130101;
A63B 24/0087 20130101; A63B 2210/50 20130101; A63B 2024/009
20130101; A63B 24/0062 20130101 |
Class at
Publication: |
482/8 |
International
Class: |
A63B 24/00 20060101
A63B024/00 |
Claims
1. A cadence detection system for use during exercise, comprising:
an exercise device having a moveable drivetrain configured to
provide a cadence, the moveable drivetrain including a target
surface; an optical sensor placed on a surface separate from the
exercise device and positioned in optical view of the target
surface of the moveable drivetrain, the optical sensor including an
emitter configured to generate an optical signal for output and a
detector configured to detect the optical signal after reflection
off of the target surface, wherein the optical sensor is configured
to generate an electrical signal based on the detected optical
signal; and a computing device configured to receive the electrical
signal from the optical sensor and to calculate at least detected
optical sensor signal instances received per unit of time.
2. The cadence detection system of claim 1, wherein: the emitter
has a nominal range; the drivetrain includes a pedal with the
target surface thereon and having a pedal stroke; and the target
surface of the pedal enters the nominal range at the maximum
position of the pedal stroke.
3. The cadence detection system of claim 2, wherein the maximum
position of the pedal stoke occurs at a position closest to the
optical sensor.
4. The cadence detection system of claim 1, wherein the emitter of
the optical sensor uses an LED light source, wherein the LED light
source emits one of infrared and visible light.
5. The cadence detection system of claim 1, wherein the surface
separate from the exercise device is a substantially horizontal
surface that supports the exercise device.
6. The cadence detection system of claim 1, wherein the computing
device includes a display to convey information to a user during
operation of the exercise device.
7. The cadence detection system of claim 1, wherein the computing
device is mounted to the exercise device.
8. The cadence detection system of claim 1, wherein the computing
device is capable of simultaneously supporting two or more optical
sensors, each optical sensor associated with a discrete exercise
device.
9. The cadence detection system of claim 1, wherein the exercise
device includes one of an upright stationary bike, an indoor cycle
trainer, a bicycle trainer, a recumbent stationary bike, an
elliptical trainer, and a cross country skiing trainer.
10. The cadence detection system of claim 1, wherein the target
surface is at least a part of a pedal or a crankset.
11. A cadence detection system for use during exercise, comprising:
at least two exercise devices having moveable drivetrains, each
configured to generate a unique cadence, the moveable drivetrains
each including a target surface; an optical sensor associated with
each exercise device and placed on a surface separate from the
associated exercise device, each optical sensor positioned in
optical view of the target surface of the respective moveable
drivetrain, wherein each of the optical sensors includes an emitter
configured to generate optical signals for output and a detector
configured to detect the optical signals after reflection off of
the respective target surface, wherein each of the optical sensors
are configured to generate electrical signals based on the detected
optical signals; and a computing device configured to receive the
electrical signals from the optical sensors and to calculate at
least detected optical sensor signal instances received per unit
time.
12. The cadence detection system of claim 11, further comprising a
display associated with each exercise device, wherein each display
is configured to convey information to a user during operation of
the exercise device.
13. The cadence detection system of claim 12, wherein the
information conveyed to the user by the display corresponds to one
or more operational parameters of the exercise device associated
with the display.
14. The cadence detection system of claim 13, wherein the
information conveyed to the user by the display corresponds to one
or more operational parameters of an exercise device associated
with a different display and at least one additional user.
15. The cadence detection system of claim 12, wherein the at least
two exercise devices are substantially similar and selected from
the group consisting of an upright stationary bike, an indoor cycle
trainer, a bicycle trainer, a recumbent stationary bike, an
elliptical trainer, and a cross country skiing trainer.
16. A method of detecting cadence during stationary exercise,
comprising: continuously emitting light from a light source having
a nominal range; moving a component of a drivetrain into and out of
the nominal range; detecting reflected light off of the component;
and calculating cadence of the drivetrain.
17. The method of claim 16, wherein the component of the drivetrain
enters the nominal range at the maximum stroke position of the
drivetrain.
18. The method of claim 17, wherein the optical sensor is
configured to send the signal to the computing device each time the
component is detected.
19. The method of claim 17, wherein the optical sensor is
configured to send the signal to the computing device at a
determined time interval, the signal transmitting the number of
instances the component is detected during said time interval.
20. The method of claim 17, wherein the computing device displays
information associated with operation of the exercise device to a
user.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims the benefit of Provisional
Application No. 61/512,858, filed Jul. 28, 2011, which is hereby
incorporated by reference.
BACKGROUND
[0002] Cycling is a very popular activity for both recreational
riders and racing enthusiasts alike. Professional cyclists and
triathletes are earning large sums of money through races,
sponsorships, and advertisements. Moreover, cycling provides many
health benefits for average riders in that it strengthens various
muscle groups along with providing aerobic and anaerobic exercise
to the user. Furthermore, physicians and physical therapists are
turning to stationary cycle devices to rehabilitate patients from
automobile, athletic, or work-related injuries. Because of this,
there is a demand for indoor, stationary exercise trainers that
simulate actual outdoor riding so that professional and
recreational cyclists may train or exercise regardless of the
weather, and that patients can rehabilitate injuries in the
presence of their physicians and physical therapists.
[0003] Various stationary cycle trainers have been presented to
address this need. Conventional stationary cycle trainers simulate
the characteristics of outdoor training by applying a variable
resistance device to provide resistance against the pedaling of the
rider. The variable resistance device mimics the resistances a
rider would face during actual outdoor training such as wind
resistance, rolling resistance, and resistances due to riding over
varying terrain. The variable resistance devices may be of the
wind, fluid, or roller type. Recently, the use of "eddy current"
trainers has achieved widespread use due to their ability to
simulate the resistance (loads) felt by riders during actual
riding.
[0004] Further advancements in "eddy current" trainers have allowed
for the monitoring and evaluation of the rider's or patient's
performance during the exercise session. These trainers generally
use a microprocessor/sensor arrangement to calculate several
session parameters, such as heart rate, energy exertion, time
elapsed, distance and cadence. Currently available sensors for
sensing cadence include a reed switch or hall effect sensor mounted
directly to the cycle frame, and a magnet base mounted for rotation
with one of the cycle crank arms or chain rings. Such cadence
sensors generate a pulse signal to be transmitted to the
microprocessor each time the magnet base passes the reed switch or
hall effect sensor.
[0005] The microprocessor of the eddy current trainer is also
connected to an electric drive circuit that energizes the
electromagnets of the variable resistance device at predetermined
times and power levels in order to simulate changes in terrain. An
eddy current trainer that uses electromagnets to simulate real life
bicycling road conditions, and that uses a microprocessor to
evaluate the user's performance as stated above, is currently sold
under the trademark COMPUTRAINER by Racermate, Inc., Seattle,
Wash.
SUMMARY
[0006] This summary is provided to introduce a selection of
concepts in a simplified form that are further described below in
the Detailed Description. This summary is not intended to identify
key features of the claimed subject matter, nor is it intended to
be used as an aid in determining the scope of the claimed subject
matter.
[0007] In accordance with aspects of the present disclosure, a
cadence detection system is provided for use during exercise. The
system comprises an exercise device having a moveable drivetrain
configured to provide a cadence. The moveable drivetrain includes a
target surface. The system also includes an optical sensor placed
on a surface separate from the exercise device and positioned in
optical view of the target surface of the moveable drivetrain. In
some embodiments, the optical sensor includes an emitter configured
to generate an optical signal for output and a detector configured
to detect the optical signal after reflection off of the target
surface, wherein the optical sensor is configured to generate an
electrical signal based on the detected optical signal. The system
also includes a computing device configured to receive the
electrical signal from the optical sensor and to calculate at least
detected optical sensor signal instances received per unit of
time.
[0008] In accordance with another aspect of the present disclosure,
a cadence detection system is provided for use during exercise. The
system includes at least two exercise devices having moveable
drivetrains. Each device is configured to generate a unique cadence
and the moveable drivetrains each includes a target surface. The
system also includes an optical sensor associated with each
exercise device and placed on a surface separate from the
associated exercise device. Each optical sensor is positioned in
optical view of the target surface of the respective moveable
drivetrain. In some embodiments, each of the optical sensors
includes an emitter configured to generate optical signals for
output and a detector configured to detect the optical signals
after reflection off of the respective target surface, and are
configured to generate electrical signals based on the detected
optical signals. The system also includes a computing device
configured to receive the electrical signals from the optical
sensors and to calculate at least detected optical sensor signal
instances received per unit time.
[0009] In accordance with another aspect of the present disclosure,
a method is provided for detecting cadence during stationary
exercise. The method includes continuously emitting light from a
light source having a nominal range, moving a component of a
drivetrain into and out of the nominal range, detecting reflected
light off of the component, and calculating cadence of the
drivetrain.
DESCRIPTION OF THE DRAWINGS
[0010] The foregoing aspects and many of the attendant advantages
of this invention will become more readily appreciated as the same
become better understood by reference to the following detailed
description, when taken in conjunction with the accompanying
drawings, wherein:
[0011] FIG. 1 is a perspective view of one example of a cadence
detection system formed in accordance with aspects of the present
disclosure;
[0012] FIG. 2A is a partial elevational view of the cadence
detection system of FIG. 1 depicting one example of a cadence
sensor in cross section and a pedal of an associated stationary
bike, indoor cycle trainer, bicycle trainer, or the like,
positioned along a portion of its down stroke;
[0013] FIG. 2B is a partial elevational view of the cadence
detection system of FIG. 1 depicting one example of a cadence
sensor in cross section and a pedal of an associated stationary
bike, indoor cycle trainer, bicycle trainer, or the like,
positioned at the bottom of its down stroke;
[0014] FIG. 3 is a block diagram of one example of a sensor
suitable for use in the cadence detection system of FIG. 1;
[0015] FIG. 4 is a block diagram of one example of a multi rider
environment employing a centralized computing device;
[0016] FIG. 5 is a side elevational view of another example of a
cadence detection system formed in accordance with aspects of the
present disclosure;
[0017] FIG. 6 is a side elevational view of yet another example of
a cadence detection system formed in accordance with aspects of the
present disclosure;
[0018] FIG. 7 is a perspective view of still another example of a
cadence detection system formed in accordance with aspects of the
present disclosure.
DETAILED DESCRIPTION
[0019] The detailed description set forth below in connection with
the appended drawings where like numerals reference like elements
is intended as a description of various embodiments of the
disclosed subject matter and is not intended to represent the only
embodiments. Each embodiment described in this disclosure is
provided merely as an example or illustration and should not be
construed as preferred or advantageous over other embodiments. The
illustrative examples provided herein are not intended to be
exhaustive or to limit the claimed subject matter to the precise
forms disclosed. Similarly, any steps described herein may be
interchangeable with other steps, or combinations of steps, in
order to achieve the same or substantially similar result.
[0020] In the following description, numerous specific details are
set forth in order to provide a thorough understanding of exemplary
embodiments of the present disclosure. It will be apparent to one
skilled in the art, however, that many embodiments of the present
disclosure may be practiced without some or all of the specific
details. In some instances, well-known process steps have not been
described in detail in order not to unnecessarily obscure various
aspects of the present disclosure. Further, it will be appreciated
that embodiments of the present disclosure may employ any
combination of features described herein.
[0021] Referring now to FIG. 1, there is shown an exemplary
embodiment of a cadence detection system, generally designated 20,
formed in accordance with aspects of the present disclosure.
Generally, the system 20 includes a cadence sensor 22 and an
exercise device 24, such as a stationary bike, indoor cycle
trainer, bicycle trainer, or the like. In the example depicted in
FIG. 1, the exercise device 24 includes a pedal powered exercise
device in the form of a bicycle 26 having pedal driven drivetrain
28 suitably mounted to an exercise apparatus or trainer 30. As will
be described in more detail below, the cadence sensor 22 detects
movement of at least one component of the drive train 28 during
operation of the exercise device 24, which in turn, may be utilized
for calculating the cadence of the exercise device 24.
[0022] Still referring to FIG. 1, the components of the cadence
detection system 20 will now be described in more detail. As best
shown in the embodiment of FIG. 1, the exercise device 24 may
include a bicycle 26 operatively mounted to a trainer 30. The
bicycle 26 in one embodiment includes a frame 34, a front fork 36
mounted to the front of the frame 34, and handlebars 38 mounted to
an upper end of front fork 36. A front wheel 40 is mounted for
rotation on front fork 36 in a conventional manner. Alternatively,
the front wheel 40 may be omitted and the front fork 36 may be
mounted onto a stationary mount. The bicycle 26 also includes a
seat 42 and a driven rear wheel 46, which are mounted to the frame
34 rearwardly of the handlebars 38 and the front wheel 40.
[0023] The bicycle 26 further includes a drivetrain 28 to transmit
power from the rider to the driven rear wheel 46. In that regard,
the frame 34 further supports a crank set 50. The crank set 50 is
operatively connected to the frame 34 via a spindle/bearing
combination known as a bottom bracket (hidden in FIG. 1). The crank
set 50 generally includes one or more chain rings 54 or front
sprockets, a left hand crank arm 56 and a right hand crank arm
(hidden in FIG. 1), a left hand pedal 58 mounted on a left-hand
crank arm 56, and a right-hand pedal (hidden in FIG. 1) mounted on
a right-hand crank arm. Rotation of the left-hand and right-hand
pedals imparts rotation to a hub 60 of the rear wheel 46 via a
chain and cogwheel or rear sprocket arrangement 64. The rotational
speed, in revolutions per minute, of the crank set 50 or parts
thereof, is typically referred to as "cadence."
[0024] Still referring to FIG. 1, the training device 30, on which
the bicycle 26 is mounted, may include a frame 70, a resistance
generator 74, such as an eddy current brake, wind brake, fluid
brake, etc., a shaft 76 and a flywheel 78. The frame 70 is formed
of a U-shaped forward frame member 80 and a U-shaped rear frame
member 82. The ends of the frame members 80 and 82 are pivotally
joined at a pivot 84. The forward and rear U-shaped frame members
80 and 82 rotate with respect to each other around pivot 84. This
rotational movement allows the frame 70 to be moved between a
collapsed position (not shown) and an extended position (FIG. 1).
In the collapsed position, the forward and rear frame members 80
and 82 lie adjacent to each other while in the extended position or
the forward and rear members form an upside-down V, as illustrated
in FIG. 1.
[0025] The rear end of the frame 34 of the bicycle 26 is mounted
within the frame 70 of the training device 30 at the pivot point
84. When placed in the frame 70, the rotational axis of the rear
wheel 46 as defined by the hub 60 is aligned with the pivot 84. The
resistance generator 74 is mounted on the lower crossbar of the
rear U-shaped frame member 82. In the embodiment shown, the
resistance generator 74 is in the form of an eddy current brake
that includes a housing in which the mechanics and electronics for
the eddy current brake are located. A shaft 76 extends from the
resistance generator 74 and is operatively coupled thereto. The
shaft 76 is rotatably mounted within opposing bearings (hidden in
FIG. 1) in the arms of a support bracket 88. The support bracket 88
is, in turn, attached to the rear U-shaped frame member 82 so that
the rear wheel 46 contacts the shaft 76 and causes the shaft to
rotate as the rear wheel 146 rotates.
[0026] Still referring to FIG. 1, a computing device 90, which may
be in the form of a bicycle computer, a microprocessor, a
programmable circuitry, or the like, may be secured to or otherwise
associated with the bicycle 26. In one embodiment, the computing
device 90 is secured to the bicycle in a suitable location, such as
to the handlebar 38. The computing device 90 may include a memory
for storing information pertaining to one or more operating
characteristics of the bicycle 26, such as elapsed time, speed,
distance, etc., and an optional display for conveying relevant
information to the user during operation of the bicycle 26. In the
embodiment shown, the computing device 90 may also be connected to
an electric drive circuit of the eddy current brake for energizing
the electromagnets of the eddy current brake at predetermined times
and power levels in order to simulate changes in terrain.
Alternatively, the computing device 90 can be centralized and/or
located remote from the exercise device 24, and in one embodiment
shown in FIG. 4, is capable of supporting a multi-rider environment
via suitable software, such as those commercially available from
Racermate, Inc., Seattle, Wash. In such an embodiment, a display 92
may be associated with each exercise device for conveying
operational information of the associated exercise device and/or
operational information from one or more of the other exercise
devices in the multi-rider environment.
[0027] FIG. 1 further illustrates a cadence sensor 22 that is
positioned on a support surface, such as the floor, below one of
the bicycle pedals, such as left pedal 58. The cadence sensor 22 is
configured to sense each revolution of the pedal 58, and generate
signals indicative thereof. The generated signals can be outputted
to the computing device 90 for processing, display, etc. The
signals generated by the cadence sensor 22 can be subsequently
utilized by the computing device 90 to calculate the number of
pedal strokes per minute or revolutions per minute (RPMs) of the
pedals. It will be appreciated that the revolutions per minute
(RPMs) of the pedals can be calculated by known techniques in the
art. In that regard, in one embodiment, the computing device 90 may
include a timer for keeping time, and a counter for tracking the
number of signals generated by the cadence sensor 22 over a period
of time. The computing device 90 may then calculate the pedal
revolutions per minute (RPMs) by taking the number of signals
generated by the cadence sensor 22 and dividing that by the period
of time over which the signals where counted. The period of time,
for example, can be a minute (i.e., 60 seconds) or any fraction of
a minute (e.g., 1/4, 1/10, 1/20, 1/30, 1/60, etc.).
[0028] In other embodiments, the cadence sensor 22 may be
configured to accumulate the number of instances the component of
the drivetrain is detected over a predetermined period of time. The
cadence sensor 22 may be further configured to transmit the
accumulated signals to the computing device at a determined time
interval for further processing. In some embodiments, the cadence
sensor 22 may also include circuitry to process the signals
indicative of each revolution of the pedal 58, and to calculate the
current cadence associated with the exercise device.
[0029] Turning now to FIGS. 2A-2B, there is shown a cross sectional
view of one example of the cadence sensor 22 formed in accordance
with aspects of the present disclosure. As best shown in FIG. 2A,
the cadence sensor 22 generally includes a sensor 96 mounted, for
example, within a protective enclosure 98. Generally described, the
cadence sensor 22 acts as a proximity sensor or switch that
generates a signal upon detection of a target, such as the pedal
58, and as such, generates a signal for each revolution of the
pedal.
[0030] In the embodiment shown in FIG. 3, the sensor 96 comprises
an emitter 102, a detector 104, and associated device circuitry
106. The emitter 102, such as an LED, emits a beam of light 110
(See FIGS. 2A and 2B), such as infrared light, at a high speed,
under control of the device circuitry 106. On the other hand, the
detector 104, such as a photodiode or the like, senses any of the
emitted beams of light 110 that was reflected off the target, such
as the bicycle pedal 58, referred herein as "reflected light 114."
In response to the reception of reflected light 114 (See FIG. 2B),
the detector 104 and/or device circuitry 106 generates a signal for
output via a communication link, such as signal cable 116, to the
computing device 90 or the like. In the embodiment shown in FIGS.
2A and 2B, the enclosure 98 includes a base 124 detachably
connected to a lid or cover 128 via any fastening technique that
provides a secure coupling between the base and the cover 128 when
connected thereto but also provides selective decoupling for
separating the base and the cover. One such fastening technique
that may be practiced with embodiments of the present invention is
a threaded connection, as shown in FIGS. 2A and 2B. The sensor 96
is mounted on a planar surface of the base 124, such as upon boss
130, and aligned below a centralized opening or window 132 in the
cover 128. A protective lens 138 is positioned over the sensor 96
and aligned with the opening 132 of the cover 128 between the base
124 and the cover 128. In the embodiment shown, the lens 138 and
the boss 130 of the base 124 cooperate to ensconce the sensor 96.
The lens 138 can be made of glass, plastic, etc., and is
translucent or transparent such that the beam of light emitted from
the sensor 96 (via emitter 102) can pass through the window portion
140 of the lens 138 to the exterior of the enclosure 98 a
predetermined distance, thereby defining the nominal range of the
cadence sensor 22 and shown as by the arrow 144 in FIG. 2B, and
similarly, reflected light 114 of a suitable intensity, which has
been reflected by the target, can pass back through the lens 138
and be detected by the sensor 96 (via detector 104). A seal 146 may
be provided between the cover 128 and the protective lens 138 in
order to keep dirt and other debris from the sensor 96.
[0031] In one embodiment, the lens 138 is dome shaped and is
constructed out of transparent glass. In this embodiment, the lens
138 is of suitable thickness to provide compression strength to
withstand the force of a rider's foot stepping or falling onto the
sensor 22.
[0032] The operation of one embodiment of the cadence detection
system 20 in accordance with aspects of the present disclosure will
now be described in detail. In operation, the rider rotates the
pedals of the bicycle 26, which in turn, drives the rear wheel 46
against the shaft 76, which in turn, rotates against the resistance
generated by the resistance generator 74. In some embodiments, as
the rider turns the pedals, the computing device 90 outputs
commands to the resistance generator. These commands can, for
example, instruct the resistance generator to energize the load
generator, such as an eddy brake, at predetermined times and power
levels in order to simulate changes in terrain.
[0033] During use of the exercise device 24, the cadence sensor 22
detects the rotation of the drivetrain 28, and if desired,
calculates the cadence of the rider in real-time or near real-time
(e.g., rolling increment of 1 second, 5 seconds, etc.). In that
regard, the device circuitry 106 drives the emitter 102 to emit a
beam of light 110, such as infrared light, at high speed. The beam
of light 114 emitted from the emitter 102 passes through the lens
138 and out through the opening 132 of the cover 128 to the nominal
range 144 of the cadence sensor 22. With every revolution of, for
example, the left pedal 58, the pedal passes through the nominal
range 144 of the cadence sensor 22. As it passes through the
nominal range of the cadence sensor 22, the beam of light 110
emitted from the emitter 102 reflects off of the pedal 58 as
reflected light 114 back toward the detector 104. The detector 104
then detects the reflected light 114, and in response to the
detection of the reflected light 114, the device circuitry 106
and/or the detector 104 generates a signal for output via a
communication link, such as signal cable 116. In this way, the
cadence sensor 22 generates a signal for each revolution of the
pedal 58. The generated signals can be transmitted to computing
device 90 or the like and utilized thereby for calculating the
number of pedal strokes per minute or revolutions per minute (RPMs)
of the pedals. In one embodiment, the cadence sensor 22 is arranged
and configured such that a signal is generated when the pedal 58 is
positioned at its maximum or lowest position during its down
stroke.
[0034] While the system 20 has be shown herein and described above
with a bicycle/trainer combination as the exercise device, other
pedal powered exercise devices and non-pedal powered exercise
devices may also be employed. For example, a cadence detection
system 220, 320 may be comprised of an upright type or recumbent
style stationary bicycle 224, 324, respectively, and the cadence
sensor 22, as best shown in FIGS. 5 and 6. Additionally, a cadence
detection system 420 may be comprised of a cross country skiing
trainer 424 and the cadence sensor 22, as best shown in FIG. 7.
Other non-pedal powered exercise devices may also be employed in
embodiments of the present disclosure, such as stair stepping
machines, rowing machines etc.
[0035] Various principles, representative embodiments, and modes of
operation of the present disclosure have been described in the
foregoing description. However, aspects of the present disclosure
which are intended to be protected are not to be construed as
limited to the particular embodiments disclosed. Further, the
embodiments described herein are to be regarded as illustrative
rather than restrictive. It will be appreciated that variations and
changes may be made by others, and equivalents employed, without
departing from the spirit of the present disclosure. Accordingly,
it is expressly intended that all such variations, changes, and
equivalents fall within the spirit and scope of the claimed subject
matter.
* * * * *