those work...
but for an ab exercise i prefer to do pikes on a swiss ball. if you're serious about working your core at home, invest in a swiss ball, you can do tons of work outs at home and they aren't too expensive.
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2002 LC Accent:
2.0 litre Beta II with CVVT. Short ram intake. Custom exhaust. Magnaflow muffler.ZENN lowering springs. KSPEC strut brace. Custom Interior.
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