Quote from Kejardon:
Funny, I've tried to improve my reaction time for years, and I've yet to see any improvement.
It may be that you have already reached your limit.
Quote from Blackdrake1:
What do I do after I get the Varia Suit? Is the Speed Booster or Graplling Beam or Power Bombs next?
Return to Norfair and wander around its western part.