Strong's #1129: gumnasia (pronounced goom-nas-ee'-ah)
 from 1128; training, i.e. (figuratively) asceticism:--exercise.
Thayer's Greek Lexicon:
 ́ 
 
  gumnasia 
 
 1) the exercise of the body in a palaestra or school of athletics
 2) any exercise whatever
 
 2a) the exercise of conscientiousness relative to the body such as is characteristic of ascetics and consists in abstinence from matrimony and certain kinds of food
 
  Part of Speech: noun feminine
Relation: from G1128
  Citing in TDNT: 1:775, 133
 
Usage:
This word is used 1 times:
1 Timothy 4:8: "For bodily  exercise profiteth little: but godliness"