Modern pentathlon and fencing as two different types of sports both have a high demand for energy reserves, so reasonable dietary supplement plays a key role for physical recovery. In the daily diet,
protein as a part of the body is not directly involved in energy sources. Human body needs energy mainly comes from the carbohydrate and fat stored in the body, we call it non-protein energy system.
This study was designed to discover the feature of non-protein dietary intake and energy expenditure of modern pentathlon and fencing athletes.
Study in a total of 17 athletes, of which nine men and eight women. The average age was 24.5±3 . All experiments for 3 days. Testing the resting energy expenditure (REE), and the body shape (height,
weight, body composition) on the first and the third days early in the morning on an empty stomach. Record for three consecutive days to fill in diet (dietary record, DR), using food weighing method
to calculate the dietary energy intake (EI).
There is no significant difference between energy intake (EI) and energy expenditure (EE) in modern pentathlon athletes (P=0.084), but EI is lower than EE from the average . The EI of fencing athletes
is statistically lower than EE（P=0.015）, which means the non-protein energy intake is insufficient. These results indicated that the daily diet of Shanghai modern pentathlon and fencing athletes is
lower than the actual energy consumption. According to the “Recommended Dietary Nutrients and Food Intake for Chinese Athletes ”by Chen Jili etc. The non-protein substance energy intake of modern
pentathlon and fencing athletes were below the recommended value. In the resting state, there is no significant difference between the modern pentathlon and fencing athletes in REE (P = 0.935).There
is no significant difference between the modern pentathlon and fencing athletes in the energy provided by carbohydrate and fat oxidation (P=0.862 and P=0.897, respectively). The proportion of energy
supply from carbohydrate and fat both close to 1.1: 1(1.17：1 and 1.15：1, respectively). Athletes for three consecutive days of dietary survey found that athletes of different events without
significant difference in EI (P=0.929), carbohydrate and fat intake and the proportion of energy supply has no obvious difference, for CHO: FAT=1.77: 1 and 1.92: 1 respectively.
The non-protein substance energy intake of Shanghai modern pentathlon and fencing athletes is insufficient, need to further strengthen in the diet supplement. The proportion of carbohydrate and fat
intake of modern pentathlon athletes needs to be further optimized. There was no significant correlation between REE and sports type.