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I hear a crackling sound under my knee cap when i walk up/down the stairs but without any pain.

Can i do situps and cycling with this problem?

Also is there any remedial exercises for knee related problems?

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closed as off-topic by Baarn, JohnP, Freakyuser, FredrikD, Greg Oct 20 '13 at 21:20

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Questions on general health and medical advice are off-topic here; you should contact a qualified medical professional instead." – Baarn, JohnP, Freakyuser, FredrikD, Greg
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