"...discipline yourself for the purpose of godliness; 8for bodily discipline is only of little profit, but godliness is profitable for all things, since it holds promise for the present life and also for the life to come." (1 Timothy 4:7-8).
You should note that scripture doesn't say that bodily discipline has no value, just 'little' value. That is because the same lessons found in godliness can be found there, only limited to displaying its value in this current life among physical realities. So if the lessons are not transferred and applied to more meaningful pursuits, they are lost to this life alone and have no ongoing value.
I am reminded of Samson who displayed the Spirit and power of GOD through 'weight lifting' and other physical displays of power. His last act on earth was a feat of weight lifting actually, when he lifted the support structure of a temple off of its foundation and brought it down on the heads of his enemies and the enemies of GOD.
John the Baptist was a 'Nazarite' like Samson who had similar physicality, surviving and thriving in the most extreme desert conditions in order to step away from all of society's corruption and call others to leave it behind in preparation for Christ. Jesus described him as being the 'greatest man born unto women,' yet immediately afterwards described the 'least' member of the kingdom of heaven as 'greater than he,' (Luke 7:28).
John, (and all who know GOD primarily as a 'superior physical force'), have learned only the lessons of GOD that prepare us for the true spiritual power and wisdom GOD represents. GOD offers us more than a mastery of physical realities. He invites into new worlds where physical things themselves are subject to greater expressions and higher laws. The physical things are mere shadows by comparison.