Supine Beginner/Intermediate Pull-up March 28, 2008 by Cathe Friedrich Patent Pending Brenda demonstrates a beginner/intermediate supine Pull-Up. Categories: Blog, Fitness Accessories, Push-Pull TowerTags: cathe, STS, STS Tower Leave a Comment Related PostsWhat Are the Short and Long-Term Effects of Exercise on the Immune System?March 29, 2020Are Dumbbells an Effective Substitute When You Don’t Have Barbells?March 25, 2018How the Way You Chew Impacts Your WeightJanuary 13, 2013