This study examined the effectiveness of a tailored text-messaging intervention on physical activity (PA), physical fitness (PF), and physical activity self-efficacy among five purposively-selected baccalaureate nursing students. No scale was located that was specifically designed to measure PA self-efficacy in the late adolescent and young adult (LAYA) college population. Therefore, the Physical Activity Appraisal Inventory--Adolescence and Young Adult Version (PAAI-AYA) was developed by modifying an existing scale to fit the LAYA college population. Though the PAAI-AYA needs further testing and confirmatory factor analysis, psychometric evaluation of the scale showed it was reliable and had good concurrent validity with an established scale and with self-reported PA levels. The PAAI-AYA was used to measure PA self-efficacy changes in this single-casestudywith concurrent multiple baselines across subjects and with four predetermined baseline periods. A prescreening survey was used to select one male and four female students who demonstrated either high PA level and high PA self-efficacy or low PA level and low PA self-efficacy, and those students were randomized to four baselines. All dependent variables were measured multiple times throughout the study. Four participants’ self-reported PA increased compared with baseline. Three participants had statistically significant cardiorespiratory fitness improvements, and two participants had significant waist-hip ratio decreases. Four participants’ PA self-efficacy increased compared with baseline. The results provided evidence that text-messaging may be effectively used with nursing students to increase physical activity, physical fitness, and physical activity self-efficacy.

Date of publication

Fall 12-22-2016

Document Type

Dissertation (Local Only Access)



Persistent identifier


Committee members

Belinda Deal, Barbara K. Haas, Zhaomin He, Dennis O’Connell


Doctor of Philosophy in Nursing

Available for download on Saturday, January 05, 2019