Introduktion: Hastighetsbaserad styrketräning är en metod där rörelsehastighet används för att styra träning, samt monitorera träningsintensitet och volym. Metoden har vuxit fram som ett komplement till traditionellt procentbaserad styrketräning. Syfte: Syftet med litteraturstudien var att undersöka effekterna mellan olika metoder av hastighetsbaserad styrketräning och dess förhållande till traditionell procentbaserad styrketräning. Metod: En strukturerad litteratursökning genomfördes i de vetenskapliga databaserna PubMed och SPORTDiscus med de primära sökorden; velocity-based training, percentage based training och training effect. En ytterligare sökning genomfördes i referenslistorna bland de artiklar som uppfyllde inklusionskriterierna. Resultat: Litteraturstudien visade att hastighetsbaserad styrketräning medförde liknande styrkeökningar som traditionell procentbaserad styrketräning. Hastighetsbaserad styrketräning medförde större ökningar i hopphöjd jämfört med traditionell procentbaserad styrketräning. Ingen av interventionerna medförde träningseffekter på sprintförmåga. Konklusion: Hastighetsbaserad styrketräning verkar vara lika effektivt för att utveckla maximal styrka men effektivare för att utveckla hoppförmåga jämfört med traditionellt procentbaserad styrketräning. Hastighetsbaserad styrketräning med lägre procentuell hastighetsförlust verkar vara fördelaktigt för att utveckla hoppförmåga medan högre procentuell hastighetsförlust verkar vara fördelaktigt för att utveckla muskelhypertrofi. / Introduction: Velocity based training refers to a method where movement velocity is used to regulate strength training and monitor training intensity and volume. In addition, velocity based training could be considered as a complementary method to traditional percentage based training. Purpose: The aim of the literature review was to investigate the effects of different velocity based training methods and their relationship to traditional percentage based training. Method: A structured literature search was conducted in the scientific databases PubMed and SPORTDiscus with the following search terms; velocity-based training, percentage based training and training effect. A further search was conducted in the reference list among articles that met the inclusion criteria. Results: The literature review shows that velocity based training leads to similar gains in maximal strength as traditional percentage based training. However, velocity based training leads to greater gains in jump height compared to traditional percentage based training. Sprint ability showed no clear outcome following any of the interventions. Conclusion: Velocity based training seems to be just as efficient in developing maximal strength but more efficient in developing explosive strength such as jump height compared to traditional percentage based training. In addition, velocity based training with lower velocity loss thresholds may be more beneficial to improve jump height, whilst higher velocity loss threshold may be more beneficial to develop muscle hypertrophy.

Background: A crucial part of rehabilitation of cardiovascular disease is to increase aerobic capacity. High intensity intervals are an emerging field in cardiac rehabilitation. Adhering to physical training has been shown to be quite hard for these patients. There is no systematic review of different training intensities for these patients that also include interventions towards changing and adhering to new training behaviors. Objective: Map out changes in VO2peak from high intensity intervals or moderate continuous training in cardiac rehabilitation and to see if theories or techniques for behavioral change was applied to maintain and increase adherence to physical activity. Method: This systematic review was done with the databases of PubMed and PEDro. The studies could only include patients with heart failure or coronary artery diseases. Articles were assessed for quality and given a preliminary level of evidence. Results: 11 articles were included; ten studies showed a significant increase in VO2peak. Three studies showed a significant increase in VO2peak between groups in favor of high intensity intervals. Some behavior change techniques could be interpreted by the authors, but no theories were used. Conclusion: This review could not conclude that one specific modality of training is superior in cardiac rehabilitation.