• Sit-ups target your abdominal muscles, back muscles, and hip flexors, while crunches only target your abdominal muscles. • Neither sit-ups nor crunches alone burn abdominal fat. Overall activity and ...
A CSCS trainer's 5 bed exercises rebuild core strength after 65, gentler than sit-ups on your neck and back.
A 60-second self-test scores your core endurance against your age group.
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