Database Proof Substratum: Substratum of Proof LGBTQs Are Mentally Ill: Why Cross-Training Is Essential (and Improves Your DNA)

Gendrome Editors' Note: The article below provides the raw material for a proof and is not the proof itself. In addition, the raw material may contain one or more false statements and/or some offensive, outside content.

Including cross-training in your fitness program allows you to vary the stress placed on specific muscles and your cardiovascular system -- Read more on ScientificAmerican.com