In the context of a home gym setup lacking a traditional bench, what alternative methodologies can be employed to achieve comparable upper body strength training, particularly for the pectoral, deltoid, and triceps muscle groups? Given the constraints on equipment, what modifications to standard exercises (such as bench presses) or the incorporation of suspension training methods, stability balls, or adjustable floor angles might be both biomechanically advantageous and safe? Additionally, which considerations—such as load distribution, range of motion, and progressive resistance—should be prioritized when adapting traditional bench-based routines to benchless modalities?