Can a prison officer be held liable under the Eighth Amendment for failing to provide exercise for long periods of time?

503 U.S. 1, 9 (1992). Lack of outdoor exercise for extended periods of time can be sufficiently serious to amount to a deprivation of the "minimal civilized measure of life's necessities." LeMaire v. Maass, 12 F.3d 1444, 1457 (9th Cir. 1993).

Negligence does not amount to a violation of a federal constitutional or statutory right. See Farmer v. Brennan, 511 U.S. 825, 837 (1994) ("[A] prison official cannot be found liable under the Eighth Amendment . . . unless the official knows of and disregards an excessive risk to inmate health or safety[.]"); see also id. at 835 ("[D]eliberate indifference describes a state of mind more blameworthy than negligence.").