We conceptually replicated the one previous study (see record 2009-13549-001) revealing that individuals who practice a motor skill under psychological pressure (anxiety training-AT) avoid performance deterioration when exposed to higher levels of pressure. We used a >3× larger sample size than the original study and attempted to shed light on mechanisms whereby AT may promote performance under pressure by measuring variables related to three theories of choking under pressure: attentional control theory (ACT), reinvestment theory, and the biopsychosocial model (BPSM) of challenge and threat. Eighty-four participants practiced 300 golf putts over 2 days with mild psychological pressure manipulations (AT group) or no pressure manipulations (control group). On the third day, all participants completed putting posttests with no pressure manipulations, mild pressure manipulations, or high-pressure manipulations. We had participants report their mental effort, movement reinvestment, and perceived challenge/threat after each posttest to investigate ACT, reinvestment theory, and the BPSM of challenge and threat, respectively. Results showed the AT group maintained their performance across posttests, whereas the control group performed worse under pressure. Additionally, results indicated that AT moderated changes in mental effort and movement reinvestment during pressure, although neither mechanism mediated the relationship between AT and performance under pressure. (PsycInfo Database Record (c) 2024 APA, all rights reserved).