Terms and Conditions

1. Who these terms are between

Jiu Jitsu Science ("the Platform", "we", "us", "our") is owned and operated by a sole trader established in the Hong Kong Special Administrative Region, referred to throughout these terms as the Operator. "You" means the person accepting these terms.

The Operator's full legal name and service address are available on request from [email protected] and will be provided without charge to any person who asks — including anyone bringing or defending a legal claim, and any consumer who is entitled to that information under the law of their own country. Nothing in this section is intended to make the Operator harder to identify or to serve.

By creating an account, subscribing, or using the Platform, you agree to these terms. If you do not agree, do not use the Platform.

We may transfer these terms, and our rights and obligations under them, to a company we later incorporate to operate the Platform. Your rights are not reduced by that transfer and no further acceptance is required.

2. Eligibility

You must be at least 18 years old to hold an account. If you are under 18, you may only view the Platform's content under the direct supervision of a parent, guardian, or qualified instructor who accepts these terms on your behalf and takes responsibility for your safety.

3. What the Platform is — and is not

The Platform publishes instructional material about Brazilian jiu-jitsu and grappling: video, written analysis, and interactive maps showing how positions and techniques connect.

It is a reference work, not instruction. Specifically:

• We are not your coach. Using the Platform creates no coach-student, professional, or supervisory relationship of any kind.
• Nothing on the Platform is medical, physiotherapeutic, or health advice. It is not a substitute for assessment by a qualified medical professional.
• No content is tailored to your body, injury history, skill level, age, or physical condition. We cannot see you and we do not know your limits.
• We make no promise that any technique will work for you, is appropriate for you, or is safe for you or your training partner.

4. Assumption of risk, and release of liability

Read this section carefully. It affects your legal rights.

4.1 Grappling is dangerous

Brazilian jiu-jitsu, submission grappling, and related activities are inherently and unavoidably dangerous. They involve joint manipulation, choking, throws, takedowns, sweeps, body weight compression, and sudden violent movement. Risks include, without limitation:

• sprains, strains, dislocations, and torn ligaments, tendons or cartilage;
• broken bones;
• damage to joints, particularly the knee, elbow, shoulder, spine and neck;
• concussion, other head injury, and spinal injury;
• loss of consciousness from strangulation, and the risks that follow from it;
• cuts, bruising, infection and skin conditions;
• cardiac events;
• permanent disability, paralysis, and death.

These risks exist even under expert supervision and even when a technique is performed correctly. They are materially increased when a technique is attempted without qualified in-person supervision, on an unsuitable surface, without an appropriate training partner, or by a person who is not physically prepared for it.

4.2 You accept those risks

You voluntarily and knowingly assume all risk of injury, death, disability, and property damage arising from attempting, practising, teaching, or applying any technique, movement, drill, concept or idea shown on or derived from the Platform, whether or not that risk arises from an error, omission, or incompleteness in our content.

You confirm that:

• you will train only in a suitable environment with appropriate matting and space, with a consenting and capable partner;
• you will seek qualified in-person instruction before attempting anything you have not been taught in person;
• you are responsible for judging your own physical fitness to train, and you have consulted a medical professional to the extent a reasonable person in your position would;
• you will stop immediately if you feel pain, dizziness, or distress, and you will respect a partner's tap or verbal signal without exception;
• you are responsible for the safety of anyone you train with or teach.

4.3 Release

To the fullest extent permitted by law, you release, waive, and agree not to sue the Operator, the Platform, and any future operating entity, together with our respective employees, contractors, contributors and instructors appearing in our content, from any and all claims, demands, damages, costs, or causes of action of any kind arising out of or connected with injury, death, disability, or property damage resulting from your use of the Platform or from any technique shown on it — including claims arising from our own ordinary negligence, and including claims brought by your training partner or by anyone claiming through you.

4.4 What this section does not do

Nothing in these terms excludes or limits liability that cannot lawfully be excluded or limited, including liability for death or personal injury caused by gross negligence, for fraud or fraudulent misrepresentation, or any liability under mandatory consumer protection law in your country of residence.

5. Accounts

You are responsible for everything that happens under your account.

• Provide accurate registration details and keep them current.
• Keep your password confidential. Do not reuse it from another service.
• Tell us promptly at [email protected] if you believe your account has been accessed without your permission.

Accounts are personal to one named individual. See section 7.

6. Subscriptions, payment and refunds

Paid access is sold as a recurring subscription, currently USD 20 per month, charged through our payment provider. Prices may be shown in your local currency at the prevailing rate.

• Subscriptions renew automatically until cancelled.
• Cancel any time from your account page. Cancellation takes effect at the end of the current billing period; you keep access until then.
• Except where a refund is required by law, fees already paid are non-refundable, including for partial periods and for periods in which you did not use the Platform.
• We may change prices on at least 30 days' notice to the email address on your account. Continuing after the change takes effect means accepting the new price.
• We do not receive or store your full card details. Payment is handled by our payment provider under its own terms.

7. Your licence, and what you may not do

Subject to these terms and to your subscription being current, we grant you a personal, limited, non-exclusive, non-transferable, revocable licence to stream and view the content for your own private, non-commercial training.

That is the entire licence. You are not granted any right to copy, distribute, or make the content available to anyone else.

7.1 Account sharing

Your account is for you alone.

• Do not share your password, login link, or any access credential with any other person, including training partners, teammates, coaches, or family members.
• Do not sell, rent, lend, or transfer your account.
• Concurrent streams are limited to two. This exists so you can watch on your phone and your laptop, not so two people can share one subscription. We may block additional streams.
• A gym, academy, team, or business may not use an individual account to provide access to its members or staff. Contact us for licensing if that is what you need.

7.2 Copying and redistribution

You must not:

• download, record, screen-capture, rip, scrape, or otherwise make a copy of any video or other content, except for the automatic temporary caching your browser performs to play it;
• circumvent, disable, or attempt to defeat any access control, geographic restriction, watermark, signed URL, encryption, or other technical protection measure;
• re-upload, mirror, stream, publish or distribute our content in whole or in part on any other platform, including social media, messaging groups, file hosts, torrents, or private servers;
• show our content publicly, at a gym, seminar, class, or commercial event;
• use our content or our system maps to build, train, or fine-tune any machine learning or artificial intelligence model, or to create a competing product;
• use automated means to access the Platform, including bots, crawlers, or scripted downloaders;
• remove or alter any copyright notice, watermark, or attribution.

7.3 Enforcement

We monitor for the conduct described above. We may, at our discretion and without refund:

• limit or block concurrent streams;
• require you to re-authenticate or reset your password;
• suspend or terminate your account;
• pursue any legal remedy available to us, including claims for damages and for our costs of enforcement.

Where we suspend an account for suspected sharing and you tell us it was a mistake, we will look at it again in good faith.

8. Intellectual property

All content on the Platform — video, text, diagrams, system maps, the arrangement and structure of the maps, branding and code — is owned by us or licensed to us, and is protected by copyright and other laws. The system maps and the relationships they express are original works and are protected as such.

Nothing in these terms transfers any ownership to you.

If you believe content on the Platform infringes your copyright, write to [email protected] with enough detail to identify the work and your claim.

9. Availability

We aim to keep the Platform available but do not guarantee it. Access may be interrupted for maintenance, upgrades, or reasons outside our control, including the acts of our hosting, video, payment and network providers, and including network filtering or blocking in your country. We are not liable for such interruptions.

We may change, add to, or withdraw content and features. Where we withdraw a substantial part of the paid content, you may cancel.

10. Disclaimers

To the fullest extent permitted by law, the Platform and all content are provided "as is" and "as available", without warranty of any kind, express or implied, including implied warranties of merchantability, fitness for a particular purpose, accuracy, and non-infringement.

We do not warrant that the content is accurate, complete, current, or suitable for you, nor that the Platform will be uninterrupted, secure, or error-free.

11. Limitation of liability

To the fullest extent permitted by law:

• We are not liable for any indirect, incidental, special, consequential, or punitive loss, nor for loss of profit, revenue, data, goodwill, or opportunity, however arising.
• Our total aggregate liability to you for all claims arising out of or connected with the Platform, whether in contract, tort (including negligence), statute or otherwise, is limited to the greater of (a) the total subscription fees you paid us in the twelve months before the event giving rise to the claim, and (b) USD 100.

Section 4.4 applies to this section.

12. Indemnity

You will indemnify and hold us harmless against any claim, liability, loss, or cost (including reasonable legal fees) arising from your breach of these terms, your misuse of the Platform, your infringement of any third party's rights, or any injury to a person you trained with, taught, or applied a technique to.

13. Suspension and termination

You may close your account at any time from your account page.

We may suspend or terminate your access immediately if you breach these terms, if we reasonably suspect fraud or unauthorised sharing, or if required by law. On termination your licence ends immediately. Sections 4, 7, 8, 10, 11, 12 and 14 survive termination.

14. Governing law and disputes

These terms, and any dispute or claim arising out of or in connection with them or with your use of the Platform (including non-contractual disputes), are governed by the laws of the Hong Kong Special Administrative Region.

You and we submit to the exclusive jurisdiction of the courts of Hong Kong SAR.

If you are a consumer resident outside Hong Kong, you keep the benefit of any mandatory protections and any right to bring proceedings in the courts of your country of residence where local law gives you that right regardless of this clause.

Before starting proceedings, please write to [email protected]. Most disputes are cheaper and faster to resolve by email.

15. General

• Changes. We may update these terms. Material changes will be notified to the email address on your account at least 14 days before they take effect, and the "last updated" date above will change. Continuing to use the Platform after that means accepting the updated terms.
• Severability. If any provision is held unenforceable, it is severed and the rest continues in force.
• No waiver. If we do not enforce a right, we do not waive it.
• Entire agreement. These terms and the Privacy Policy are the whole agreement between us about the Platform.
• Third parties. A person who is not a party to these terms has no right to enforce them under the Contracts (Rights of Third Parties) Ordinance (Cap. 623), except that the persons released under section 4.3 may enforce that section.

16. Contact

General and legal: [email protected] Account security: [email protected]