Historical clue formulations

• It hurts how much we’re overcharging for this detergent! — 2026-04-05
• Rhyming advice to a gym rat — 2026-01-12
• Adage for getting through tough times — 2023-08-25
• Macho credo — 2008-10-10
• Saw in a gym — 2004-10-29
• Bodybuilder's credo? — 1998-08-11