A meta-analysis described MBSR as "a group program that focuses upon the progressive acquisition of mindful awareness, of mindfulness".[15] The MBSR program is an eight-week workshop taught by certified trainers that entails weekly group meetings (2.5 hour classes) and a one-day retreat (seven-hour mindfulness practice) between sessions six and seven, homework (45 minutes daily), and instruction in three formal techniques: mindfulness meditation, body scanning and simple yoga postures.[2] Group discussions and exploration - of experience of the meditation practice and its application to life - is a central part of the program.