prEN ISO 20957-5

SLOVENSKI STANDARD
01-marec-2026
Nepremična oprema za vadbo - 5. del: Nepremična kolesa za vadbo in oprema za
vadbo zgornjega dela telesa, dodatne posebne varnostne zahteve in preskusne
metode (ISO/DIS 20957-5:2026)
Stationary training equipment - Part 5: Stationary exercise bicycles and upper body
crank training equipment, additional specific safety requirements and test methods
(ISO/DIS 20957-5:2026)
Stationäre Trainingsgeräte - Teil 5: Stationäre Trainingsfahrräder und Kurbel-
Trainingsgeräte für den Oberkörper, zusätzliche besondere sicherheitstechnische
Anforderungen und Prüfverfahren (ISO/DIS 20957-5:2026)
Équipement d'entraînement fixe - Partie 5: Bicyclettes fixes d'exercice et équipements
d'entraînement à manivelles de la partie supérieure du corps - Exigences spécifiques de
sécurité et méthodes d'essai supplémentaires (ISO/DIS 20957-5:2026)
Ta slovenski standard je istoveten z: prEN ISO 20957-5
ICS:
97.220.30 Oprema za dvoranske športe Indoor sports equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 20957-5
ISO/TC 83
Stationary training equipment —
Secretariat: DIN
Part 5:
Voting begins on:
Stationary exercise bicycles 2026-01-01
and upper body crank training
Voting terminates on:
2026-03-26
equipment, additional specific
safety requirements and test
methods
Équipement d'entraînement fixe —
Partie 5: Bicyclettes fixes d'exercice et équipements
d'entraînement à manivelles de la partie supérieure du corps
— Exigences spécifiques de sécurité et méthodes d'essai
supplémentaires
ICS: 97.220.30
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 20957-5:2026(en)
DRAFT
ISO/DIS 20957-5:2026(en)
International
Standard
ISO/DIS 20957-5
ISO/TC 83
Stationary training equipment —
Secretariat: DIN
Part 5:
Voting begins on:
Stationary exercise bicycles
and upper body crank training
Voting terminates on:
equipment, additional specific safety
requirements and test methods
Équipement d'entraînement fixe —
Partie 5: Bicyclettes fixes d'exercice et équipements
d'entraînement à manivelles de la partie supérieure du corps
— Exigences spécifiques de sécurité et méthodes d'essai
supplémentaires
ICS: 97.220.30
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2026
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
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TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
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RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 20957-5:2025(en)
ii
ISO/DIS 20957-5:2025(en)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification . 2
5 Safety requirements. 5
5.1 General .5
5.2 Transmission elements and rotating parts .6
5.3 Temperature rise .6
5.4 Loading .6
5.4.1 Seat pillar and frame.6
5.4.2 Handlebar and frame . .6
5.4.3 Pedal and frame .6
5.5 Seat pillar — Seat .7
5.5.1 Insertion depth .7
5.5.2 Seat adjustment .7
5.5.3 Seat tilting .7
5.6 Handlebar stem .7
5.7 Stability .7
5.8 Additional requirements for recumbent stationary exercise bicycles, upper body crank
training equipment and combined crank training equipment .7
5.8.1 Combined crank training equipment .7
5.8.2 Seat system .8
5.9 Additional classified requirements .8
5.10 Endurance .11
5.11 Additional instructions for use . 12
5.12 Additional warnings . 12
6 Test methods .12
6.1 General . 12
6.1.1 Dimensional check . 12
6.1.2 Visual examination . 12
6.1.3 Tactile examination . 12
6.1.4 Performance test . 12
6.2 Testing of temperature rise . 12
6.3 Testing of transmission elements, rotating parts, squeeze and shear points . 13
6.3.1 Crank and stationary parts of the construction . 13
6.3.2 Other moving parts . 13
6.4 Testing of loading . 13
6.4.1 Seat pillar and frame. 13
6.4.2 Handlebar and frame . . 13
6.4.3 Pedal and frame . 13
6.5 Testing of seat tilting . .14
6.6 Testing of seat back rest .14
6.7 Testing of stability .14
6.8 Description of the test device .14
6.9 Testing of constant power mode . 15
6.10 Testing of heart rate control mode . 15
6.11 Testing of power accuracy for class A and class B . 15
6.11.1 General . 15
6.11.2 Crank training equipment with speed independent resistance system . 15
6.11.3 Crank training equipment with speed dependent resistance system .16
6.12 Testing of power repeatability for class B .17

iii
ISO/DIS 20957-5:2025(en)
6.13 Endurance test .17
6.13.1 Crank training equipment with speed independent resistance system .17
6.13.2 Crank training equipment with speed dependent resistance system .17
7 Test report . 17
Annex ZA (informative) Relationship between this European Standard and the safety
requirements of Regulation 2023/988/EU aimed to be covered .18
Bibliography .20

iv
ISO/DIS 20957-5:2025(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 83, "Sports and other recreational facilities and
equipment".
This third edition cancels and replaces the second edition (ISO 20957-5:2016), which has been technically
revised.
The main changes are as follows:
— formulation aligned with EN ISO 20957-1:2024;
— Clause 2 updated;
— Clause 3 modified to remove unused terms and definitions;
— “intrinsic loading” renamed to “loading”;
— “speed independent system” renamed to “speed independent resistance system” for clarity;
— “speed dependent system” renamed to “speed dependent resistance system” for clarity;
— Table 1 modified to allow Class B accuracy class products to display power in Watts;
— Table 2 modified to allow Class B accuracy class products to display power in Watts and to correct the
section on maximum power;
— Annex A removed;
A list of all parts in the ISO 20957 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

v
ISO/DIS 20957-5:2025(en)
Introduction
This document concerns the safety of crank training equipment. It amends and supplements
ISO 20957-1:2024. The requirements of this document take priority over those in ISO 20957-1:2024.

vi
DRAFT International Standard ISO/DIS 20957-5:2025(en)
Stationary training equipment —
Part 5:
Stationary exercise bicycles and upper body crank training
equipment, additional specific safety requirements and
test methods
1 Scope
This document specifies safety requirements for stationary exercise bicycles and upper body crank training
equipment in addition to the general safety requirements of ISO 20957-1.
This document is applicable to stationary training equipment type stationary exercise bicycles and upper
body crank training equipment (type 5) as defined in Clause 3 within the classes S, H, I and A, B, C according
to ISO 20957-1.
Any attachment provided with the stationary exercise bicycles and upper body crank training equipment
for the performance of additional exercises are subject to the requirements of ISO 20957-1.
This document is not applicable to roller stands as they cannot be made safe in a reasonable way.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 4210-8:2023, Cycles — Safety requirements for bicycles — Part 8: Pedal and drive system test methods
ISO 20957-1:2024, Stationary training equipment — Part 1: General safety requirements and test methods
EN 71-1:2014+A1:2018, Safety of toys — Part 1: Mechanical and physical properties
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 20957-1:2024 and the
following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
crank training equipment
stationary apparatus on which work is carried out by turning a crank mechanism either by using the lower
body or the upper body or both
3.2
freewheel
mechanism which is designed to disengage the crank mechanism from the drive system in one direction

ISO/DIS 20957-5:2025(en)
3.3
seat pillar
connection between the frame and the seat provided to adjust the height of the seat
3.4
seat tube
part of the frame where the seat pillar (3.3) is inserted
3.5
handlebar stem
connection between the frame and the handlebar provided to adjust the height of the handlebar
3.6
load adjustment
device to change the level of resistance felt by the user
3.7
constant power mode
programme that adjusts the equipment resistance level, allowing the user to maintain a selected, predetermined
power level during the performance of the exercise, independent of pedalling revolutions per minute
n n
Note 1 to entry: PM=⋅2 ⋅⋅π =⋅2 M⋅⋅
60P 60
where
P is the power, in Watts;
M is the torque at the crank axle, in Newton metre;
n is the crank speed, in revolutions per minute.
3.9
adjustable handlebar
handlebars which can be adjusted for different training positions
3.10
seat system
system that consists of seat, seat back rest, adjustment and mounting components
4 Classification
The classification shall be according to ISO 20957-1:2024.
NOTE Figure 1 to Figure 3 are intended only to give examples and to illustrate the names of the components.

ISO/DIS 20957-5:2025(en)
Key
1 handlebar
2 display
3 hand grip
4 contact heart rate sensor
5 handlebar stem
6 handlebar height adjustment
7 frame
8 protective cover
9 pedal strap
10 transport wheel
11 pedal
12 power supply
13 foot
14 crank
15 flywheel
16 seat tube
17 seat height adjustment
18 seat pillar
19 horizontal seat adjustment
20 seat
21 load adjustment
ISO/DIS 20957-5:2025(en)
22 handlebar adjustment device
23 heart rate belt
Figure 1 — Example of upright stationary exercise bicycle
Key
1 display
2 seat back rest
3 seat
4 seat handlebar
5 seat adjustment
6 frame
7 protective cover
8 crank
9 pedal
10 pedal strap
11 front handlebar
12 heart rate hand sensor
Figure 2 — Example of recumbent stationary exercise bicycle

ISO/DIS 20957-5:2025(en)
Key
1 display
2 crank
3 handle
4 seat back rest
5 seat
6 vertical seat adjustment
7 horizontal seat adjustment
8 foot rest
9 frame
10 flywheel
11 protective cover
Figure 3 — Example of upper body crank training equipment
5 Safety requirements
5.1 General
The following requirements shall apply, depending on the design of the crank training equipment.

ISO/DIS 20957-5:2025(en)
5.2 Transmission elements and rotating parts
The test finger shall not become entrapped and shall not come into contact with moving parts which do not
have a smooth surface.
Where the diameter of the path of motion of the crank extends past the stationary parts of the construction
(e.g. protective cover or frame), the distance between the pedal cranks and the stationary parts of the
construction shall be ≥10 mm.
This requirement does not apply
a) in the area 50 mm from the axis of the crank;
b) if the diameter of the path of motion of the crank does not extend past the stationary parts of the
construction.
If a flywheel is exposed, the exposed edges of the flywheel shall have a radius ≥2,5 mm.
Test in accordance with 6.1.1, 6.3.1 and 6.3.2.
5.3 Temperature rise
Accessible parts of the crank training equipment shall not have a temperature greater than 65 °C.
Test in accordance with 6.2.
5.4 Loading
5.4.1 Seat pillar and frame
The crank training equipment shall withstand a load of 2,5 times the maximum user's body mass ±5 % as
specified in the instructions for use or 2 500 N, whichever is greater. During the test, the crank training
equipment shall not tip over and the slippage of the adjusted seat pillar into the seat tube shall be ≤5 mm.
Test in accordance with 6.4.1.
5.4.2 Handlebar and frame
The handlebars shall withstand a load of 0,3 times the maximum user's body mass ±5 % specified in the
instructions for use or (300 ± 15) N, whichever is greater for class H; for classes S and I, a load of 0,3 times
the maximum user's body mass specified in the instructions for use or (450 ± 15) N, whichever is greater.
For recumbent bikes, the seat handlebars shall withstand a vertical load of 2,5 times the maximum user's
body mass ±5 % specified in the instructions for use or 2 500 N, whichever is greater.
After the test, the training equipment shall not be broken or have visible signs of fracture or cracking and
shall still function as intended.
Test in accordance with 6.4.2.
5.4.3 Pedal and frame
Pedals shall be in accordance with EN ISO 4210-8:2023.
After the test, the training equipment shall not be broken or have visible signs of fracture or cracking and
shall sti
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