Fitness: 166 sit-ups for 31 days – this is how my body changed

DThe classic sit-ups train the straight abdominal muscles. A muscle group that, if exercisers stick with it, will quickly notice and see progress.

Same with me. I soon increased my workload to four sets – two 42s, two 41s. With each passing day the sit-ups become more natural, they don’t feel like a burden but a gain. And: I notice how my posture changes.