![[Sit-ups] mainly exercises the upper abdominal muscles](/uploadfile/2025/0118/20250118102418376.jpg)
Fifteen training methods and recommended plans (DOC document download)
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The most effective home slimming and fitness plan
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Good abdominal muscle training moves: supine T-bar twist!
What is the most effective way to exercise shoulder muscles?
A complete list of rear deltoid training exercises
