28 CFR 551.115 - Recreation.
(a) When consistent with institution security and good order, pretrial inmates may be allowed the opportunity to participate with convicted inmates in recreational activities. Staff shall ensure that inmates who do not participate in recreational activities with convicted inmates have access to other recreational activities.
(1) One hour daily of outside recreation, weather permitting; or
(2) Two hours daily of indoor recreation.
(d) Staff shall provide the pretrial inmate housed in Administrative Detention or Disciplinary Segregation with exercise as provided by the Bureau of Prisons rules on Inmate Discipline. (See 28 CFR part 541, subpart B.)