Maybe you will find these references useful:

Steinhardt, M., & Dishman, R. (1989). Reliability and validity of Expected Outcomes and Barriers for Habitual Physical Activity. Journal Of Occupational Medicine, 31(6), 536-546.

Brown, S. (2005). Measuring perceived benefits and perceived barriers for physical activity. American Journal of Health Behavior, 29(2), 107-116.

Brown, S., Huber, D., & Bergman, A. (2006). A perceived benefits and barriers scale for strenuous physical activity in college students. American Journal of Health Promotion, 21(2), 137-140.

Sechrist, K., Walker, S., & Pender, N. (1987). Development and psychometric evaluation of the exercise benefits/barriers scale. Research in Nursing & Health, 10(6), 357-365.

Best regards,

Zeljko

This might also be useful Siefken K, Schofield G, Schulenkorf N. Laefstael jenses: An investigation of barriers and facilitators for healthy lifestyles of women in an urban Pacific island context. Journal of Physical Activity and Health. 2014;11(1):30-37

The work by Jule Kunkel, titled "A healthy lifestyle campaign by youth-for-youth: the challenge of empowerment and the potential of collaboration" might be relevant too. (online available)

best

Katja

This systematic review may also be helpful.

In addition to the recommendations above of specific articles and a systematic review, I would recommend qualitative methods. Qualitative methods are especially appropriate if you are interested in understanding the barriers to physical activity in a particular community or unique population (e.g., youth living in a specific reservation in Illinois).