Haroy J, Thorborg K, Serner A, Bjorkheim A, Rolstad LE, Holmich P, Bahr R, Andersen TE Including the Copenhagen Adduction Exercise in the FIFA 11+ Provides Missing Eccentric Hip Adduction Strength Effect in Male Soccer Players: A Randomized Controlled Trial. Am J Sports Med. 2017 Nov;45(13):3052-3059. doi: 10.1177/0363546517720194. Epub 2017 Aug 14.
Ishoi L, Sorensen CN, Kaae NM, Jorgensen LB, Holmich P, Serner A Large eccentric strength increase using the Copenhagen Adduction exercise in football: A randomized controlled trial. Scand J Med Sci Sports. 2016 Nov;26(11):1334-1342. doi: 10.1111/sms.12585. Epub 2015 Nov 21.
Jansen JA, Mens JM, Backx FJ, Kolfschoten N, Stam HJ Treatment of longstanding groin pain in athletes: a systematic review. Scand J Med Sci Sports. 2008 Jun;18(3):263-74. doi: 10.1111/j.1600-0838.2008.00790.x. Epub 2008 Apr 6.
Serner A, Jakobsen MD, Andersen LL, Holmich P, Sundstrup E, Thorborg K EMG evaluation of hip adduction exercises for soccer players: implications for exercise selection in prevention and treatment of groin injuries. Br J Sports Med. 2014 Jul;48(14):1108-14. doi: 10.1136/bjsports-2012-091746. Epub 2013 Mar 19.
Thorborg K, Holmich P, Christensen R, Petersen J, Roos EM The Copenhagen Hip and Groin Outcome Score (HAGOS): development and validation according to the COSMIN checklist. Br J Sports Med. 2011 May;45(6):478-91. doi: 10.1136/bjsm.2010.080937. Erratum In: Br J Sports Med. 2011 Jul;45(9):742.
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
