Dic: feel up to, be up to

• Those patients who were up to it could move to the adjacent pool.     
• His fellow-directors were not up to running the business without him. 
• I don't feel up to jogging today. 
• Aunt Mary didn't feel up to making the visit. 

1. PREP-PHRASE : PREP n/-ing | If you feel up to doing something, you are well enough to do it. 
2. feel up to something:  to feel well enough or prepared enough to do something. (Often in the negative.) 

..... Cobuild, http://idioms.thefreedictionary.com/feel+up+to