keep up your strength;  chin up!
 brimming with health (vigor, vigour);  full of vitality;  full of health
 to feel uplifted;  to be cheered up;  to hearten;  to be inspired;  to be energized
 putting on a brave face;  put-on cheeriness;  pretending one is fine;  show of courage;  bravado;  Dutch courage
 to encourage;  to give courage to
 putting on a brave face;  put-on cheeriness;  pretending one is fine;  show of courage;  bravado;  Dutch courage
 to get encouraged;  to become heightened in spirits;  to recover one's strength
 cheerfully;  spiritedly;  vigorously;  lively
 take care;  take good care of yourself
 full of energy;  full of liveliness;  full of pep
 pep-up;  reassurance;  pick-me-up;  restorative;  energizer
 extremely healthy;  lively;  in good spirits
 full of energy;  full of liveliness;  full of pep
 full of energy;  full of liveliness;  full of pep
 brimming with vitality;  full of vigor;  full of life
 recovering one's spirits;  rejuvenation;  refection