Most meal plans that emphasize self-control do not include necessary feasting. You may be allowed a cheat day, or you may take one anyway, but the emphasis is usually on limited rather than unlimited portions.
When Christ gives Himself to us, He gives all of Himself. We have a portion in Christ, but we do not get only a portion of Him. We do not have to “cheat” to get more of Him.
Both during training and during the actual run, it is important to get the proper fuel for your body. You need energy stores for immediate effort and for down the road. I’ve seen odd things offered to runners along a marathon route, from bananas to bagels to beer, from marijuana to Monster drinks. Some of these will keep a runner going for a moments, some of them will keep a runner going for miles.
In the stadium of the Christian life, the same is true. If every week was like a lap, there is a full table at the first corner set for sake of soul gratitude and gas.
The communion table is not separate from our self-control, it is part of it. This meal feeds our faith in the imperishable reward, and reminds us that we all run in body as a Body. We run to win, but we run together, to win together, which is not the typical way to think of a race.
We all have Christ, and we have all of Christ. He is the one who qualifies us to share in the inheritance of the saints in light (Colossians 1:12), and He Himself is our refreshment and our provision for the race.