About 8 months ago..my left knee began to complain rather loudly that he had done enough... the Dr called it 'arthritis' and his only advice was to 'man up'.
It got really bad for a while- I was having an 8 or 9 pain level at the end of each work day. But with some therapy, changing to walking, new shoes, taking anti-inflammatories I now go through a day and not notice it much. I also took the synvisc shot in December and it seems to have helped.
There are great benefits for walking. I have sought out some Biblical motivation to help me adjust.
 Finally, then, brothers, we ask and urge you in the Lord Jesus, that as you received from us how you ought to walk and to please God, just as you are doing, that you do so more and more.  For you know what instructions we gave you through the Lord Jesus.  For this is the will of God, your sanctification: that you abstain from sexual immorality;  that each one of you know how to control his own body in holiness and honor,  not in the passion of lust like the Gentiles who do not know God;
(1 Thessalonians 4:1-5 ESV)
 Therefore, as you received Christ Jesus the Lord, so walk in him,  rooted and built up in him and established in the faith, just as you were taught, abounding in thanksgiving.
(Colossians 2:6-7 ESV)
I DO MISS MY RUNNING.. but this is God's way for me right now...
They tell me that a brisk walk and a run for the same distance… burns VERY CLOSE to the same calories? The variable is time. I average about 9:30 a mile when I am jogging and I hike a mile in around 20 minutes- but both of those burn about the SAME number of calories.
But in many ways- WALKING IS the better exercise. It is good on the joints and it allows an opportunity to OBSERVE and ENJOY the beauty of the journey.
And ‘walking’ is the preferred analogy in the Scriptures to define the Christian life. The verses at the beginning of this post show an example of this. In fact, the walk we are in is the BEST indicator of whether we actually know Christ.
Look at what the apostle John wrote:
 This is the message we have heard from him and proclaim to you, that God is light, and in him is no darkness at all.  If we say we have fellowship with him while we walk in darkness, we lie and do not practice the truth. (1 John 1:5-6 ESV)
Walking is a continued path… a habit… a trend… it makes a worn path or trail. If we look back at the recent ‘trail’ of our life and it is always ‘darkness’, what fruit do we have that supports what our lips may proclaim?
John gives us the positive picture of this as well:
But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus his Son cleanses us from all sin. (1 John 1:7 ESV)
What does the pattern of our ‘walk’ say about the condition of our heart?
To be clear- (And John balances this out BEAUTIFULLY in 1 John)- this does not mean we walk WITHOUT SINNING- but it is referring to the PATTERN or TREND.
And we can walk LONGER. Are you tired from running? Take a few days and change the routine. Go on a brisk walk… or ride a bicycle.. or swim… just keep moving!
So what does a HOLY WALK… look like?
It is a path illuminated by God’s word- ‘a lamp unto our feet and a light unto our path’’ (Psalm 119:105)
It is a walk characterized by HOLY choices- putting off sin and putting on righteousness
It is a humble walk- not in our will and power- but according to HIS will and power
It is a loving and serving walk where we love God BY loving others
It is a walk under the yoke of Christ- who is gentle and easy for us
It is an upward climb with joy toward the heavenly Mount Zion and the New Jerusalem
It is a walk of change- progress- when we look back we are not what we used to be
It is a walk forward- we still have room to get better- we are not what we ought to be
It is slow enough to enjoy the journey and steady enough to keep going in the storms
It is a walk on our knees in prayer
It is a walk with our hands lifted in praise and thanksgiving
It is a walk in the full armor of God (Eph. 6)
It is a walk through the valley of the shadow of death with peace and comfort
It is a walk of glorious light
It is a walk that PLEASES GOD, we can feel His smile and delight