Fitness No, not sit-ups — I tried this 10-minute standing dumbbell ab workout and it torched my core . ... Standing alternating V-ups x 10-20 reps. Twisted chair pose x 10-20 reps.

Crystalline 'artificial muscle' makes paper doll do sit-ups. ScienceDaily . Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2019 / 07 / 190717105309.htm ...