Do I have it?

  I am a 21 year old male. Within the last couple of months I have noticed a
  tightening of the underside of my forearms. It almost feels
  like my forearms are completely exhausted after activity such as throwing
  the football around with my roommate. My hands slightly tremble when I
  outstretch my fingers. My hands tremble slightly while eating. The trembles
  are more noticeable after physical activity. I am righthanded. The
  tightening seems worse in my right forearm. I used to lift weights off and
  on for the past 5 years. I havn't done any weight lifting for the past
  few months due to a lack of time. I have remained active by playing
  football and basketball. I do not have a drooling or balance problem.
  My dads 67 year old brother's hands tremble slightly when doing
  something like stuffing an envelope.I am concerned.Do I have the symptoms?
  If so,what are my chances of leading a normal life? The underside of
  my forearms have tightened up some while typing this. However, I am not the
  best typist. If it doesn't seem like Parkinson's, what else could it be?
  Please help me out. Thank you.
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I think it is highly unlikely that you have Parkinson