The Consumer Council has not received complaints about yoga-related injuries this year, but that doesn't mean people aren't getting hurt. Donald Lui Po-ying, a Central physiotherapist, says he saw a handful of yoga students this summer. Mr Lui attended to two patients with yoga-related injuries in July, including a middle-aged woman who suffered knee pain after completing a yoga posture. Last month he saw three more patients, including a woman in her 40s who hurt her ankle and knee while doing yoga at home. Mr Lui said there should be a governing body to upgrade the knowledge of instructors. 'They need a lot of training. They must know a lot about anatomy and the biomechanics of the human body ... but it may be too hard for them.' The Consumer Council published recommendations in its Choice magazine this year to protect people from harmful instructors and bad sales practices. They suggested that people interested in yoga check their teacher's qualifications beforehand. The group also advised readers to ask for trial sessions beforehand.