Topic

Fitness

2 articles

17 August 2026·4 min read

What Muscles the Back Extension on an Exercise Ball Actually Works

Spine, glutes, and hamstrings share the work in a back extension on an exercise ball. Learn how setup and spinal position change what you feel rep to rep.

• fitness
• exercise-ball
• strength-training

9 August 2026·3 min read

What Muscles the Push-Up Actually Works

Push-ups mainly work the chest, triceps, shoulders, and core. Learn how setup and range of motion shift the effort when your form changes.

• fitness
• push-ups
• strength-training

Back to the full journal, or try the free lifting calculators.