title: Electromyographic muscle activity in curl-up exercises with different positions of upper and lower extremities.
authors.affiliation: Biomechanical Analysis Laboratory, Department of Biomechanics, University School of Physical Education, Wroclaw, Poland. alicja.rutkowskakucharska@awf.wroc.pl
authors.forename: Alicja
authors.initials: A
authors.lastname: Rutkowska-Kucharska
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Szpala