A new study suggests that a small amount of exercise, possibly as little as 30 minutes per week, may have significant health benefits. The research appears to indicate that short periods of intense exercise or strength training can reduce the risk of certain diseases, although some reports mention a catch or caveat to these findings. The exact nature and duration of the exercise required to achieve these benefits is not entirely clear, with some outlets emphasizing the importance of intensity and others suggesting that even mild exercise can be beneficial.