This research aims to identify the effect of the use of oranges on:

Biochemical variables (Vitamin C or Acid Ascorbic- glutathione GSH- Vit B2- MDA) of swimming specialized students.
Improving the skill level of crawl stroke, backstroke and breaststroke swims (50 m timing- 50 m performance) and enduring swimming for 3 min for swimming specialized students.
From the results that the researchers reached and within the limits of the research sample they concluded the following:

There are statistically significant differences between the post measurements of the experimental and control groups in the level of some biochemical variables (vitamin C or ascorbic acid - glutathione GSH - Vit B2 – MDA) in favor of the experimental group.
There are statistically significant differences between the post measurements of the experimental and control groups in the digital level of crawl stroke, backstroke and breaststroke swims (50 m timing- 50 m performance) and enduring swimming for 3 min in favor of the experimental group.

Recommendations:
In light of the research results and the limits of the sample, the researcher recommends the following:

The use of oranges before training delays the fatigue appearance and improves the skill level of swimming specialized students.
The trainers' attention to the swimmers nutrition side, especially eating orange before the starting of the training to contribute in improving the skill level.
Conduct other studies on nutrition that delay fatigue appearance and improve the skill level of swimmers.
Conduct other studies on oranges for other sports.