He's on Prevention of Injury watch in a Supermax prison. I'm not familiar with US rules, but on suicide watch in a high security UK prison you're not usually al

He's on Prevention of Injury watch in a Supermax prison. I'm not familiar with US rules, but on suicide watch in a high security UK prison you're not usually allowed to exercise. This is partly because there's a risk you may be able to overpower guards, but also because you can injure yourself if you over-exercise. Whatever the reason in Manning's case, it'll be more to do with bureaucratic rules than any particular desire to torture. If they wanted to torture him they'd submit him to the treatment signed off by the Bush administration.