Bursts of high intensity interval training (HIIT) may be more effective for weight loss than longer less intense workouts, a study suggests.
The research, published in the British Journal of Sports Medicine, analysed results from 36 earlier studies.
Although all the participants lost weight, those doing HIIT saw a 28.5% greater weight loss.
The researchers cautioned that HIIT may not be suitable for everyone.
"Hiit might increase the risk of injury and impose higher cardiovascular stress," they said.