Sit-ups may seem old-school, but they remain one of the most straightforward and revealing measures of real-world core strength. In just a single minute, you can test your endurance, mobility, and ...

I challenged myself to 100 sit‑ups daily for 4 weeks. Watch the results, setbacks, and what this did (or didn’t do) for my abs and body fat. ‘Not Constitutional’: Trump Threatens Blue Slip Suit Warren ...