Questions, answered.

Blood Flow Restriction partially restricts blood flow out of a working limb while you move. Applied before exercise it primes muscles and tendons; during exercise it makes light loads work like heavy ones; after exercise it accelerates recovery. It is one of the most researched interventions in performance sport.

The straps are built into every Hytro product - one per limb, fastened in a single sweep to a patch on the outside of the limb. No pumps, no wires, no extra equipment. Full fitting instructions are in the User Guide.

Used as designed, yes - Hytro is the only BFR product validated as safe to use without supervision (Neal et al., 2023). Follow the fit and release cues in the Safety Guide, and if you have a cardiovascular, circulatory or clotting-related condition, are pregnant, or are recovering from surgery or injury, speak to a clinician first.

A firm squeeze, never pain - and consult the protocol guides for the appropriate settings for each modality. If you feel pins and needles, numbness or your limb changes colour beyond a normal training flush, release immediately and refasten looser.

No - that is the point. Strap in during the warm-up you already do, drop the load on exercises you already know, or wear it while you cool down. The User Guide covers when and how long for all three.

Yes - the Performance BFR Certification: 8 modules of video-led, applied learning, NSCA approved for 0.7 CEUs (Category C). Details and enrolment at the certification page.

Yes, we ship all over the world. Shipping costs will apply, and will be added at checkout.

UK: 1-2 days | Europe: 3-5 days | United States: 5-10 days | Asia: 5-10 days | Oceania: 7-21 days.

International shipping times will range depending on the country we are shipping to. We cannot guarantee the delivery times above once your order lands in the country of receipt, due to local couriers.

A tracking link is provided in your order confirmation email. Follow that link for status updates and tracking details during delivery.

We will gladly accept returns within 30 days of your order arriving for a full money back guarantee. If proven to be the case, we will also accept returns of faulty items thereafter.

Note: we will only accept returns on items if they are sent back unopened, in their original packaging and with the tags still attached.

To make a return, email customersupport@hytro.com and we will assist you.

Machine wash cold with the strap tabs fastened to their patches, no softener, hang dry. The full instructions - including the core recommendations - are on the Product Care page.

Hytro fits like your usual training kit - check your measurements against the Size Guide. The fit should be snug but not restrictive before the straps are fastened.