Physical Activity — A Trial of an Affect-Guided Physical Activity Prescription
Citation(s)
Ekkekakis P, Lind E, Vazou S Affective responses to increasing levels of exercise intensity in normal-weight, overweight, and obese middle-aged women. Obesity (Silver Spring). 2010 Jan;18(1):79-85. doi: 10.1038/oby.2009.204. Epub 2009 Jun 25.
Ekkekakis P, Lind E Exercise does not feel the same when you are overweight: the impact of self-selected and imposed intensity on affect and exertion. Int J Obes (Lond). 2006 Apr;30(4):652-60.
Ekkekakis P, Parfitt G, Petruzzello SJ The pleasure and displeasure people feel when they exercise at different intensities: decennial update and progress towards a tripartite rationale for exercise intensity prescription. Sports Med. 2011 Aug 1;41(8):641-71. doi: 10.2165/11590680-000000000-00000. Review.
Parfitt G, Alrumh A, Rowlands AV Affect-regulated exercise intensity: does training at an intensity that feels 'good' improve physical health? J Sci Med Sport. 2012 Nov;15(6):548-53. doi: 10.1016/j.jsams.2012.01.005. Epub 2012 May 31.
Williams DM, Dunsiger S, Jennings EG, Marcus BH Does affective valence during and immediately following a 10-min walk predict concurrent and future physical activity? Ann Behav Med. 2012 Aug;44(1):43-51. doi: 10.1007/s12160-012-9362-9.
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.
