title: Maximal strength training improves running economy in distance runners.
abstract: OBJECTIVE
  The present study investigated the effect of maximal strength training on running economy (RE) at 70% of maximal oxygen consumption (V[spacing dot above]O2max) and time to exhaustion at maximal aerobic speed (MAS). Responses in one repetition maximum (1RM) and rate of force development (RFD) in half-squats, maximal oxygen consumption, RE, and time to exhaustion at MAS were examined.
  
  
  METHODS
  Seventeen well-trained (nine male and eight female) runners were randomly assigned into either an intervention or a control group. The intervention group (four males and four females) performed half-squats, four sets of four repetitions maximum, three times per week for 8 wk, as a supplement to their normal endurance training. The control group continued their normal endurance training during the same period.
  
  
  RESULTS
  The intervention manifested significant improvements in 1RM (33.2%), RFD (26.0%), RE (5.0%), and time to exhaustion at MAS (21.3%). No changes were found in V[spacing dot above]O2max or body weight. The control group exhibited no changes from pre to post values in any of the parameters.
  
  
  CONCLUSIONS
  Maximal strength training for 8 wk improved RE and increased time to exhaustion at MAS among well-trained, long-distance runners, without change in maximal oxygen uptake or body weight.
authors.affiliation: Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway. oyvind.storen@hit.no
authors.forename: Oyvind
authors.initials: O
authors.lastname: Støren
authors.forename: Jan
authors.initials: J
authors.lastname: Helgerud
authors.forename: Eva Maria
authors.initials: EM
authors.lastname: Støa
authors.forename: Jan
authors.initials: J
authors.lastname: Hoff
mesh_terms: D000293:Adolescent; D000328:Adult; D015444:Exercise; D005260:Female; D006801:Humans; D008297:Male; D053580:Muscle Strength / Q000502:physiology; D010806:Physical Education and Training; D010807:Physical Endurance / Q000502:physiology*; D012420:Running / Q000502:physiology*