Nordbelt product facts and research

Product facts, usage documentation and research references for editors, reviewers and physiotherapists. Prepared by Nordbelt. Last checked: 5 September 2026.

What is Nordbelt?

Nordbelt is a portable training tool that secures your ankles for the Nordic Hamstring Curl. It uses an adjustable strap, a metal buckle and padded ankle supports. See the Nordbelt product page and current price.

Product facts at a glance

Item	Description
Exercise	Nordic Hamstring Curl, also called the Nordic Hamstring Exercise or Nordic curl.
Attachment	A suitable solid door, stable fitness bench or fixed fence/beam. The surface and attachment must suit the application.
Standard kit	Nordbelt, a storage bag, a manual and a progressive ten-week training protocol.
Usage limits stated in the manual	Users older than 18 years, up to 122 kg. These are the manufacturer's stated instructions; safe use also requires a suitable anchor, inspection and correct execution.
Care stated in the manual	Clean with water and allow to dry. Inspect for wear or defects before use.

Sources: online guide, PDF manual and demonstrations. Read the complete instructions and safety information before use. If you have an injury or symptoms, your treating physician or physiotherapist should determine the appropriate exercise and load.

Which research is relevant?

The publications below investigate the Nordic Hamstring Exercise and programmes that include it. They do not test Nordbelt. A training programme's outcome is therefore not a measured effect of this product.

• van Dyk, Behan and Whiteley (2019). A meta-analysis of 15 studies involving 8,459 athletes found fewer hamstring injuries in programmes including the exercise: pooled relative risk 0.49 (95% confidence interval 0.32–0.74). This is the origin of the frequently cited 51% figure; it is not an individual guarantee. Paper and abstract.
• Petersen and colleagues (2011). A randomised study involving 50 Danish men's football teams and 942 players recorded 15 acute hamstring injuries in the intervention group and 52 in the control group. The programme used ten weeks of progressive training followed by weekly sessions during the season. Paper and abstract.
• Impellizzeri, McCall and van Smeden (2021). A methodological reappraisal selected randomised studies differently and found limited certainty about the preventive effect. Its updated estimate was RR 0.59 (95% confidence interval 0.27–1.29). Study selection and uncertainty are therefore part of an accurate account. Paper and abstract.

These references do not establish that Nordbelt prevents cramps, accelerates recovery or guarantees a particular reduction in injury risk. A reference to ISO guidelines in product documentation is also not evidence of clinical effectiveness or an independent certificate. The component value mentioned on the safety page must not be converted into a safe user load.

Reviewing Nordbelt

A useful product review describes actual use and its conditions. Record the product version, attachment setup, tester's exercise experience and instructions available beforehand. Then describe adjustment, ankle comfort, stability, storage and limitations. For setup timing, define the start and finish and report every attempt.

A usability review is not a load test or a clinical study. Include both strengths and drawbacks. When publishing, disclose whether the product was purchased, loaned or supplied and whether a commercial relationship exists.

Documentation and contact

• Guide, PDF manual, step videos and training progression
• Usage conditions and safety context
• Nordbelt's team and background
• Public customer reviews on Trustpilot

Nordbelt is based in Rotterdam, the Netherlands. Dutch Chamber of Commerce number: 94393486. For product questions, source corrections or editorial enquiries, contact contact@nordbelt.com. Please include your topic, intended publication and the documentation you need.

This page is information provided by the brand. Customer reviews and practical experiences are separate sources; they are not independent research into effectiveness.