Brown G E, Davis E, Johnson A
Department of Psychology, University of Tennessee, Martin 38238, USA.
Psychol Rep. 1999 Feb;84(1):155-6. doi: 10.2466/pr0.1999.84.1.155.
For three consecutive days, two groups of adult female cockroaches (Periplaneta americana) (ns = 10) received inescapable shock. 24 hr. later one group was exposed to 10 min. of forced exercise on a treadmill while the other group received no exercise. Both groups were then run in a shuttlebox escape task. The cockroaches exposed to forced exercise did not become helpless in the shuttlebox escape task.