Possible Clues:

• Like some exercise
• Kind of muscle contraction
• Type of exercise
• (Of muscle action) taking place with normal contraction
• One drunk on one cold type of drink
• Kind of drink I really drink
• Type of drink is old gin mixer
• One thus shot in the arm is equally tense
• Is nothing added to cordial at the same pressure?
• Having the same concentration of salt as mammalian blood