All-Time Best Norwegian Track and Field Athletes: to What Extent Did They Achieve Outstanding Results at the Ages of 15 and 18 Years?

by Leif Inge Tjelta, Ola Tjensvoll
Published 2020-09-01

From inactive to half-marathon runner in 20 weeks

by Leif Inge Tjelta, Iselin Brandal Berge
Published 2015-08-01

Relationship between level of performance and training characteristics of runners competing in the Oslo Marathon

by Leif Inge Tjelta, Shaher A. I. Shalfawi, Vienna Søyland Dahle
Published 2019-02-01

Norwegian primary health care: Evaluation of a lifestyle intervention program

by Silje Stangeland Lie, Cecilie Hagland Sevild, Leif Inge Tjelta, Sindre Mikal Dyrstad
Published 2013-12-01