Provided herein in some embodiments is a resistance-training system including an upper-body garment having a first section of a single-layered construction and a second section of a multi-layered construction. The single-layered construction can include a first fabric layer. The multi-layered construction can include the first fabric layer, a second fabric layer, and a resistance-providing layer in-between the first fabric layer and the second fabric layer. The resistance-training system also includes a lower-body garment having the multi-layered construction, optionally with a different resistance-providing layer than the upper-body garment. The resistance-providing layer of the upper-body garment and the lower-body garment can be configured to provide resistance to one or more user movements for a user donning the resistance-training system.