Comment on 'Forces on hockey players: vectors, work, energy and angular momentum Nina Nassen et al 2019 Eur. J. Phys. 40 065005'

Nassen et al (2019 Eur. J. Phys. 40 065005) are recommending a different hockey skating technique called 'angular momentum skating'. The authors use examples of physics, and physics equations for work and energy of traditional forward skating strides. However, this information can be interpreted as a disguise for their different skating technique because the physics models and equations do not capitulate any justification for hockey players using their angular momentum skating technique. The authors suggestion to use an angular momentum skating technique is a judgement not founded on proof or certainty. They offer no objective proof, through physics equations or otherwise, that angular momentum skating has any benefits for hockey players to be faster, more efficient skaters.

Automated summary

Nassen et al recommend a different hockey skating technique called 'angular momentum skating', but fail to provide concrete evidence that this technique offers benefits for players. Their suggestion lacks proof or certainty, with no objective support for the idea that angular momentum skating can make hockey players faster or more efficient skaters.