8 week study. 9 resistance exercises vs. 50 minutes of exercise. Similar results on DM outcomes. Some differences in fitness and physique, but overall, a reasonable alternative for diabetics who can't get in as much aerobic exercise as we would like.
Ng CL, Goh SY, Malhotra R, et al. Minimal difference between aerobic and progressive resistance exercise on metabolic profile and fitness in older adults with diabetes mellitus: a randomised trial. J Physiother. 2010;56(3):163-70. (Original) PMID: 20795922