Acute aerobic exercise has been shown to improve mood and affect in active adults. Lower body positive pressure treadmills (LBPPT) have been utilized to reduce loading on the musculoskeletal system and to provide an alternative to running and cross-training. While the biomechanical and physiological responses to the LBPPTs have been well-researched, little is known about psychological responses and how this compares to other forms of exercise. PURPOSE: To investigate mood, affect, and self-efficacy, following an acute, hard-intensity exercise session and compare these responses between three modalities: cycling, LBPPT running and treadmill running (NT). METHODS: 10 active adults (average age = 30 years, SD = 10.4 years) completed a 30min, high-intensity exercise session on each of three modalities in a randomized order: bike, LBPPT, and NT. Intensity was determined as 85% age-predicted maximum heart rate. Before and after each session, feeling, arousal, affect and self-efficacy were determined using the Feeling and Arousal scale (FAS), Activation-Deactivation Adjective Checklist (ADACL), and Generalized Self-efficacy survey (GSE). RESULTS: From baseline to post-exercise, there was a significant increase in feeling (2.4 ± 0.31 vs. 3.33 ± 0.29, p=0.021), arousal (3.23 ± 0.23 vs. 4.07 ± 0.31, p=0.006), and self-efficacy (31.83± 0.83 vs. 33.97± 1.16, p= 0.013) across all three modalities. However, when compared among the three modalities, there was no observed significant change in self-efficacy values from baseline to post-exercise (p=0.708). For affect (ADACL), there was an observed significant increase in energetic arousal (25.9 ± 1.12 vs. 29.43 ± 1.36, p= 0.023) and a decrease in state anxiety (20.93± 1.73 vs. 17.367± 1.08, p= 0.041) from baseline to post-exercise across all modalities, however, this did not significantly differ among the modalities. There were no other significant changes in affect observed. CONCLUSION: Self-efficacy, feeling, energetic arousal, and anxiety improves following acute, hard intensity exercise sessions; however, these changes do not differ based on exercise modality. Psychological responses to acute exercise differs between runners and non-runners. Future research should investigate how these responses may differ between the two groups based on modality.
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